CYPRUS AMAX MINERALS CO
SC 14D9/A, 1999-10-01
METAL MINING
Previous: DAVIDSON INCOME REAL ESTATE LP, SC 14D1/A, 1999-10-01
Next: REEBOK INTERNATIONAL LTD, SC 13G/A, 1999-10-01



<PAGE>   1

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                            ------------------------

                                 SCHEDULE 14D-9

                               (AMENDMENT NO. 7)
                     SOLICITATION/RECOMMENDATION STATEMENT
                          PURSUANT TO SECTION 14(d)(4)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                            ------------------------

                          CYPRUS AMAX MINERALS COMPANY
                           (NAME OF SUBJECT COMPANY)

                          CYPRUS AMAX MINERALS COMPANY
                       (NAME OF PERSON FILING STATEMENT)

                           COMMON STOCK, NO PAR VALUE
           (INCLUDING THE ASSOCIATED PREFERRED SHARE PURCHASE RIGHTS)

                         (TITLE OF CLASS OF SECURITIES)

                            ------------------------

                           232809 10 3 (COMMON STOCK)

                     (CUSIP NUMBER OF CLASS OF SECURITIES)

                            ------------------------

                              PHILIP C. WOLF, ESQ.
              SENIOR VICE PRESIDENT, GENERAL COUNSEL AND SECRETARY
                          CYPRUS AMAX MINERALS COMPANY
                            9100 EAST MINERAL CIRCLE
                           ENGLEWOOD, COLORADO 80112
                                 (303) 643-5000
      (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON AUTHORIZED TO RECEIVE
      NOTICE AND COMMUNICATIONS ON BEHALF OF THE PERSON FILING STATEMENT)

                            ------------------------

                                    COPY TO:
                             ELLIOTT V. STEIN, ESQ.
                         WACHTELL, LIPTON, ROSEN & KATZ
                              51 WEST 52ND STREET
                            NEW YORK, NEW YORK 10019
                                 (212) 403-1000

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>   2

     This statement amends and supplements the Solicitation/Recommendation
Statement on Schedule 14D-9 of Cyprus Amax Minerals Company, a Delaware
corporation ("Cyprus Amax"), filed with the Securities and Exchange Commission
(the "Commission") on September 9, 1999, as subsequently amended (the "Schedule
14D-9"), with respect to the exchange offer made by Phelps Dodge Corporation, a
New York corporation ("Phelps Dodge"), to exchange a combination of cash and
Phelps Dodge common stock, par value $6.25 per share ("Phelps Dodge Common
Stock"), for all of the outstanding shares of Cyprus Amax common stock, no par
value ("Cyprus Amax Common Stock"), on the terms and conditions set forth in the
Phelps Dodge Offer.

     Capitalized terms used and not defined herein shall have the meanings
assigned to such terms in the Schedule 14D-9.

ITEM 2.  TENDER OFFER OF THE BIDDER.

     Pursuant to an Agreement and Plan of Merger, dated as of September 30,
1999, among Phelps Dodge, CAV Corporation (the "Purchaser") and Cyprus Amax (the
"Phelps Dodge Merger Agreement"), providing for the merger (the "Phelps Dodge
Merger") of the Company with and into the Purchaser, the Purchaser has amended
the Phelps Dodge Offer (the Phelps Dodge Offer as amended being herein referred
to as the "Amended Offer") to (a) increase the price to be paid pursuant to the
Phelps Dodge Offer and (b) amend the conditions of the Phelps Dodge Offer to
conform to the conditions set forth as Annex A to the Phelps Dodge Merger
Agreement.

ITEM 3.  IDENTITY AND BACKGROUND.

                              THE MERGER AGREEMENT

THE AMENDED OFFER

     Conditions.  Phelps Dodge's obligation to complete the Phelps Dodge Offer
is subject to the following conditions:

     - a majority of the outstanding shares of Cyprus Amax shall have been
       tendered and not withdrawn (the "Minimum Condition");

     - the approval by Phelps Dodge stockholders of the issuance of Phelps Dodge
       Common Stock in the Amended Offer and the Phelps Dodge Merger;

     - such shares of Phelps Dodge Common Stock shall have been authorized for
       listing on the NYSE, subject to official notice of issuance;

     - the effectiveness of the registration statement for such Phelps Dodge
       Common Stock;

     - no legal restraint such as an injunction shall be in effect that would
       prevent consummation of the Amended Offer;

     - no change in tax law that would be inconsistent with the Phelps Dodge
       Merger qualifying as a reorganization under Section 368(a) of the Code;

     - accuracy of representations and warranties of Cyprus Amax, unless failure
       to be accurate would not reasonably be expected to have a material
       adverse effect on Cyprus Amax; and

     - compliance by Cyprus Amax in all material respects with material
       agreements and covenants in the Phelps Dodge Merger Agreement.

     Phelps Dodge has agreed that, without the prior written consent of Cyprus
Amax, no change may be made to the Minimum Condition or which decreases the
price per share of Cyprus Amax Common Stock payable in the Amended Offer, which
changes the form of consideration payable in the Amended Offer, which reduces
the maximum number of shares of Cyprus Amax Common Stock to be acquired in the
Amended Offer, which imposes conditions to the Amended Offer in addition to
those set forth in the Merger Agreement, or which amends any other term of the
Amended Offer in any manner adverse to the holders of the Cyprus Common Stock.
Without the prior written consent of Cyprus, Parent will not waive the Minimum
Condition if, as a result, Purchaser would acquire less than a majority of the
Cyprus Amax Common Stock outstanding.
<PAGE>   3

     Election Procedures.  Each holder of Cyprus Amax Common Stock shall be
entitled, with respect to each share of Cyprus Amax Common Stock held by such
holder, to elect to receive either $20.54 per share (the "Cyprus Cash
Consideration") or 0.3500 of a share of Phelps Dodge Common Stock (the "Cyprus
Stock Consideration"). Cyprus Amax shares that are validly tendered and not
withdrawn and (i) covered by elections to receive the Cyprus Cash Consideration
are "Cyprus Cash Election Shares", (ii) covered by elections to receive the
Cyprus Stock Consideration are "Cyprus Stock Election Shares" and (iii) not
covered by a valid election to receive either the Cyprus Cash Consideration or
the Cyprus Stock Consideration are "Cyprus Non-Electing Shares".

     If the aggregate Cyprus Cash Consideration elected in respect of all Cyprus
Cash Election Shares exceeds $7.61176875 multiplied by the total number of
shares of Cyprus Amax Common Stock outstanding immediately prior to closing of
the Amended Offer (the "Cyprus Maximum Cash Consideration"), the following will
occur:

     - each Cyprus Cash Election Share will be exchanged in the Amended Offer
       for (i) $20.54 multiplied by a fraction (the "Cyprus Cash Proration
       Factor"), the numerator of which is the Cyprus Maximum Cash Consideration
       and the denominator of which is the number of Cyprus Cash Election Shares
       multiplied by $20.54, and (ii) a number of shares of Phelps Dodge Common
       Stock equal to 0.3500 multiplied by 1 minus the Cyprus Cash Proration
       Factor; and

     - each Cyprus Stock Election Share and each Cyprus Non-Electing Share will
       be exchanged for 0.3500 of a share of Phelps Dodge Commons Stock.

     If the aggregate Cyprus Stock Consideration elected in respect of all
Cyprus Stock Election Shares exceeds 0.2203 multiplied by the total number of
shares of Cyprus Amax Common Stock outstanding immediately prior to closing of
the Amended Offer (the "Cyprus Maximum Stock Consideration"), the following will
occur:

     - each Cyprus Stock Election Share will be exchanged in the Amended Offer
       for (i) a number of shares of Phelps Dodge Common Stock equal to 0.3500
       multiplied by a fraction (the "Cyprus Stock Proration Factor"), the
       numerator of which is the Cyprus Maximum Stock Consideration and the
       denominator of which is the number of Cyprus Stock Election Shares
       multiplied by 0.3500, and (ii) cash in an amount equal to $20.54
       multiplied by 1 minus the Cyprus Stock Proration Factor; and

     - each Cyprus Cash Election Share and each Cyprus Non-Electing Share will
       be exchange for $20.54, without interest.

     If there is not an excess in cash or stock election, the following will
occur:

     - each Cyprus Cash Election Share will be exchanged for $20.54 in cash
       without interest; and

     - each Cyprus Stock Election Share will be exchanged for 0.3500 of a share
       of Phelps Dodge Common Stock.

     Each Cyprus Non-Electing Share will be exchanged for (i) an amount in cash
without interest equal to $20.54 multiplied by a fraction (the "Cyprus
Non-Electing Proration Factor"), the numerator of which is the difference
between the Cyprus Cash Number (as hereinafter defined) less the number of
Cyprus Cash Election Shares and the denominator of which is the number of Cyprus
Non-Electing Shares; and (ii) a number of shares of Phelps Dodge Common Stock
equal to 0.3500 multiplied by 1 minus the Cyprus Non-Electing Proration Factor.
The Cyprus Cash Number is determined by dividing the Cyprus Maximum Cash
Consideration by $20.54.

     Expiration or Termination of Amended Offer.  Phelps Dodge has agreed that,
without the prior written consent of Cyprus Amax, it shall not terminate or
withdraw the Amended Offer or extend the expiration date of the Amended Offer
unless at the expiration date of the Amended Offer the conditions to the Amended
Offer shall not have been satisfied or earlier waived. If, at the expiration
date of the Amended Offer, the

                                        2
<PAGE>   4

conditions to the Amended Offer shall not have been satisfied or earlier waived
but there is a reasonable possibility that such conditions may be satisfied
prior to March 31, 2000, Phelps Dodge shall extend the expiration date of the
Amended Offer for an additional period or periods of time, each of which being
no longer than five business days, until the date such conditions are satisfied
or earlier waived and Phelps Dodge becomes obligated to accept for payment and
pay for shares of Cyprus Amax Common Stock tendered pursuant to the Amended
Offer; provided, however, that if the condition to the Amended Offer relating to
a material breach by Cyprus Amax has not been satisfied at the expiration date
and Phelps Dodge has given notice of the breach that has caused such condition
not to be satisfied, Phelps Dodge shall have no further obligation to extend the
expiration date of the Amended Offer if such breach has not been cured within 30
days of such notice.

FORM OF MERGER

     If all the conditions to the merger are satisfied or waived in accordance
with the merger agreement, the Purchaser, a wholly owned subsidiary of Phelps
Dodge, will merge with Cyprus Amax, with the Purchaser surviving (the "Surviving
Corporation"). As a result of the merger, the identity and separate existence of
Cyprus Amax shall cease. The Phelps Dodge Merger will become effective when the
applicable certificate of merger is filed with the Secretary of State of the
State of Delaware. It is currently anticipated that the Phelps Dodge Merger will
become effective during the fourth quarter of 1999.

CONSIDERATION TO BE RECEIVED IN THE MERGER

     At the time the Phelps Dodge Merger becomes effective:

     CONVERSION OF CYPRUS AMAX COMMON STOCK.  Subject to no fractional shares
being issued, each issued and outstanding share of Cyprus Amax Common Stock
(other than shares to be canceled in accordance with the Phelps Dodge Merger
Agreement) shall be converted into the Cyprus Stock Consideration, the Cyprus
Cash Consideration or a combination thereof, determined pursuant to provisions
of the Phelps Dodge Merger Agreement (such consideration is referred to herein
as the "Merger Consideration"). If there is an excess of cash elections with
respect to the Amended Offer, each outstanding share of Cyprus Amax Common Stock
will be converted in the Phelps Dodge Merger into the right to receive the
Cyprus Amax Stock Consideration. If there is an excess of stock elections with
respect to the Amended Offer, each outstanding share of Cyprus Amax Common Stock
will be converted in the Phelps Dodge Merger into the right to receive the
Cyprus Amax Cash Consideration. If there is not an excess in cash or stock
election, each outstanding share of Cyprus Amax Common Stock will be converted
in the Phelps Dodge Merger into (i) an amount of cash equal to the Cyprus Amax
Merger Cash Amount (as hereinafter defined), without interest, and (ii) a number
of shares of Phelps Dodge Common Stock equal to the Cyprus Amax Merger Stock
Amount (as hereinafter defined). The Cyprus Amax Merger Cash Amount and the
Cyprus Amax Merger Stock Amount will be determined as follows:

          1.  The aggregate amount of Cyprus Amax Cash Consideration actually
     paid in the Amended Offer will be subtracted from the Total Cyprus Amax
     Available Cash (as hereinafter defined) to determine the amount of cash
     available to be paid in the Phelps Dodge Merger (the "Aggregate Cyprus Amax
     Merger Cash Consideration"). Total Cyprus Amax Available Cash equals (i)
     the number of shares of Cyprus Amax Common Stock exchanged in the Amended
     Offer plus the number of shares of Cyprus Amax Common Stock to be converted
     in the Phelps Dodge Merger, multiplied by (ii) $7.61176875.

          2.  The Aggregate Cyprus Amax Merger Cash Consideration will be
     divided by the number of shares of Cyprus Amax Common Stock to be converted
     in the Phelps Dodge Merger, to determine the amount of cash consideration
     to be paid in respect of each such share of Cyprus Amax Common Stock in the
     Phelps Dodge Merger (the "Cyprus Amax Merger Cash Amount").

          3.  The aggregate number of shares of Phelps Dodge Common Stock
     actually issued as Cyprus Amax Stock Consideration in the Amended Offer
     will be subtracted from the Total Cyprus Amax Available Stock (as
     hereinafter defined) to determine the number of shares of Phelps Dodge
     Common Stock available to be paid in the Phelps Dodge Merger (the
     "Aggregate Cyprus Amax Merger Stock
                                        3
<PAGE>   5

     Consideration"). Total Cyprus Amax Available Stock equals (i) the number of
     shares of Cyprus Amax Common Stock exchanged in the Amended Offer plus the
     number of shares of Cyprus Amax Common Stock to be converted in the Phelps
     Dodge Merger, multiplied by (ii) 0.2203.

          4.  The Aggregate Cyprus Amax Merger Stock Consideration will be
     divided by the number of shares of Cyprus Amax Common Stock to be converted
     in the Phelps Dodge Merger, to determine the number of shares of Phelps
     Dodge Common Stock to be issued in respect of each such share of Cyprus
     Amax Common Stock in the Phelps Dodge Merger (the "Cyprus Amax Merger Stock
     Amount").

     As of the effective time of the Phelps Dodge Merger, all such shares of
     Cyprus Amax Common Stock shall no longer be outstanding and shall
     automatically be canceled and retired and shall cease to exist, and each
     holder of a certificate or certificates which immediately prior to the
     effective time represented outstanding shares of Cyprus Amax Common Stock
     shall cease to have any rights with respect thereto, except the right to
     receive (x) if the Merger Consideration includes Phelps Dodge Common Stock,
     (i) Phelps Dodge certificates, (ii) certain dividends and other
     distributions in accordance with the Phelps Dodge Merger Agreement, and
     (iii) cash instead of fractional shares of Phelps Dodge Common Stock in
     accordance with the Phelps Dodge Merger Agreement, without interest, and
     (y) if the Merger Consideration includes cash, the appropriate cash
     amounts.

EXCHANGE AGENT; PROCEDURES FOR EXCHANGE OF CERTIFICATES

     EXCHANGE AGENT.  At the time the Phelps Dodge Merger becomes effective,
Phelps Dodge shall enter into an agreement with a bank or trust company that is
satisfactory to Cyprus Amax to act as the exchange agent. Phelps Dodge shall
deposit with the exchange agent cash and certificates representing the number of
whole shares of Phelps Dodge Common Stock issuable or payable pursuant to the
Phelps Dodge Merger Agreement in exchange for outstanding shares of Cyprus Amax
Common Stock. Soon after the completion of the Phelps Dodge Merger, Phelps Dodge
will send a letter to each person who was a Cyprus Amax stockholder at the time
the Phelps Dodge Merger became effective. The letter will contain instructions
on how to surrender Cyprus Amax stock certificates to the exchange agent and
receive shares of Phelps Dodge and cash. See "-- Consideration to Be Received in
the Merger."

     DIVIDENDS.  Holders of Cyprus Amax Common Stock will not be entitled to
receive any dividends or other distributions payable by Phelps Dodge until they
exchange their Cyprus Amax stock certificates for certificates representing
shares of Phelps Dodge Common Stock. Once they deliver their Cyprus Amax stock
certificates to the exchange agent, those stockholders will receive, subject to
applicable laws, accumulated dividends and distributions, without interest.

     FRACTIONAL SHARES.  No fractional shares of Phelps Dodge Common Stock will
be issued upon the surrender of certificates representing shares of Cyprus Amax
Common Stock. No dividend or other distribution of Phelps Dodge will relate to
any such fractional shares and no such fractional shares will entitle the owner
thereof to any voting or other rights of a stockholder of Phelps Dodge.

     Holders of Cyprus Amax Common Stock otherwise entitled to fractional shares
of Phelps Dodge Common Stock will receive a cash payment instead of such
fractional shares. Following the effective time, the exchange agent will
determine the excess of the number of whole shares of Phelps Dodge Common Stock
delivered to the exchange agent by Phelps Dodge for distribution to Cyprus Amax
stockholders over the aggregate number of whole shares of Phelps Dodge Common
Stock to be distributed to Cyprus Amax stockholders. The exchange agent will
then, on behalf of the former stockholders of Cyprus Amax, sell the excess
shares at then prevailing prices on the New York Stock Exchange, all in the
manner provided in the Phelps Dodge Merger Agreement.

     As soon as practicable after the determination of the amount of cash to be
paid to holders of Cyprus Amax Common Stock with respect to any fractional share
interests, the exchange agent will make available such amounts to such holders
of Cyprus Amax stock subject to and in accordance with the terms of the Phelps
Dodge Merger Agreement.

                                        4
<PAGE>   6

     DISSENTING SHARES.  Shares of Cyprus Amax Common Stock that are outstanding
immediately prior to the time the Phelps Dodge Merger becomes effective and
which are held by persons who have properly demanded appraisal for their shares
in accordance with Section 262 of the Delaware General Corporation Law shall not
be converted into the right to receive the Merger Consideration. Such persons
shall be entitled to receive payment of the appraised value of such shares.

SURVIVING CORPORATION FOLLOWING THE MERGER

     NAME OF SURVIVING CORPORATION.  The name of the surviving corporation from
and after the effective time of the Phelps Dodge Merger (the "effective time")
shall be "Cyprus Amax Minerals Company" until changed or amended in accordance
with applicable Law.

     CHARTER DOCUMENTS.  At the effective time, the certificate of incorporation
and the bylaws of the Purchaser, as in effect immediately prior to the effective
time, shall be the certificate of incorporation and bylaws, respectively, of the
Surviving Corporation.

     DIRECTORS AND OFFICERS.  The directors of the Purchaser at the effective
time shall be the directors of the Surviving Corporation until their respective
successors are duly elected and qualified, as the case may be. The officers of
the Purchaser at the effective time shall be the officers of the Surviving
Corporation until their respective successors are duly appointed.

REPRESENTATIONS AND WARRANTIES IN THE PHELPS DODGE MERGER AGREEMENT

     In the Phelps Dodge Merger Agreement both parties make representations and
warranties to each other about their companies with respect to, among other
things:

     - their organization, existence, good standing, corporate power,
       subsidiaries and similar corporate matters;

     - their capitalization;

     - their authorization, execution, delivery and performance and the
       enforceability of the Phelps Dodge Merger Agreement and related matters;

     - the recommendation by their boards of directors to their stockholders of
       the Phelps Dodge Merger Agreement and the transactions contemplated
       thereby;

     - the absence of conflicts, defaults or violations under their certificates
       of incorporation and bylaws, certain other agreements and laws as a
       result of the contemplated transactions, and related matters;

     - filings with the SEC and the accuracy and completeness of the information
       contained in such filings;

     - environmental matters;

     - employee benefit matters;

     - the Phelps Dodge prospectus, the Phelps Dodge proxy statement, the
       registration statement and other SEC filings and the accuracy of the
       information contained therein;

     - the inapplicability of the Cyprus Amax stockholder rights plan to the
       merger;

     - tax matters;

     - the receipt of fairness opinions from each party's financial advisors;

     - required stockholder approvals with respect to the contemplated
       transactions;

     - the absence of certain material changes in each party's respective
       businesses since December 31, 1998;

     - the absence of undisclosed material liabilities;

     - labor relations; and

                                        5
<PAGE>   7

     - no prior activities conducted by Purchaser.

     All representations and warranties of Phelps Dodge and Cyprus Amax expire
at the time the Phelps Dodge Merger becomes effective.

COVENANTS IN THE PHELPS DODGE MERGER AGREEMENT

     The Phelps Dodge Merger Agreement provides that, until the Phelps Dodge
Merger has been completed, neither of Phelps Dodge or Cyprus Amax will take
certain actions without the consent of the other party or as otherwise permitted
by the Phelps Dodge Merger Agreement. More specifically, the parties have agreed
to the following with respect to themselves and, where applicable, their
subsidiaries, except as otherwise permitted by the Phelps Dodge Merger
Agreement:

     - Conduct of Operations.  The parties will conduct their business
       operations according to their ordinary and usual course of business in
       substantially the same manner as conducted prior to the Phelps Dodge
       Merger Agreement.

     - Preserve Organizations.  The parties will use their reasonable best
       efforts to preserve intact their business organizations and goodwill,
       keep available the services of their current officers and other key
       employees, and preserve their business relationships.

     - Parties to Confer.  The parties will confer with each other and report on
       material operational matters and the general status of ongoing
       operations.

     - Notice of Certain Events.  The parties will notify each other of certain
       changes or events which would have a material adverse effect on Phelps
       Dodge or Cyprus Amax, as the case may be.

     - Dividends and Reclassifications.  The parties will not declare or pay any
       dividends on or make any distribution with respect to their outstanding
       shares of stock other than regular quarterly dividends on, in the case of
       Phelps Dodge, its common stock, and, in the case of Cyprus Amax, its
       common stock and preferred stock, and they will not split, combine or
       reclassify any shares of their capital stock.

     - Amendments to Plans.  The parties will not enter into or amend their
       employee benefit plans or employment agreements, except in the ordinary
       course of business consistent with past practice, as otherwise provided
       in the Phelps Dodge Merger Agreement or as required by law.

     - Business Combinations; Assets.  The parties will not enter into any
       business combinations, acquisitions or dispositions of material amounts
       of assets or securities, or release any material contract rights, in each
       case not in the ordinary course of business.

     - Governing Documents.  The parties will not propose or adopt any
       amendments to their corporate charters or bylaws.

     - Issuance of Capital Stock.  The parties will not issue or authorize the
       issuance of any shares of their capital stock of any class, except that
       each is permitted to issue shares of common stock upon the exercise of
       stock options or other rights outstanding on the date of the Phelps Dodge
       Merger Agreement and in accordance with the terms of such options or
       other rights in effect on the date of the Phelps Dodge Merger Agreement.

     - Repurchase of Stock.  The parties will not purchase or redeem any shares
       of their stock or any rights, warrants or options to acquire any such
       shares, except in the ordinary course of business in connection with
       employee incentive and benefit plans or arrangements in existence on the
       date of the Phelps Dodge Merger Agreement.

     - Indebtedness.  The parties will not incur, assume or prepay any
       indebtedness or other material liabilities, other than indebtedness with
       a wholly owned subsidiary or between wholly owned subsidiaries.

                                        6
<PAGE>   8

     - Properties and Assets.  The parties will not sell, lease, mortgage or
       otherwise encumber or subject to any lien or otherwise dispose of any of
       their properties or assets (including securitizations), other than in the
       ordinary course of business consistent with past practice.

     - Tax Treatment.  The parties will not take any actions that would
       reasonably be expected to cause the Phelps Dodge Merger not to constitute
       transactions described in Section 368(a) of the Internal Revenue Code.

     - Tax Election.  The parties will not make any material tax election or
       settle or compromise any material tax liability, other than in the
       ordinary course of business consistent with past practice. Cyprus Amax
       may make an election under Section 338(h)(10) of the tax code relating to
       the completed sale of Cyprus Amax Coal Company.

     - Agree to Take Actions.  The parties agree not to take any of the
       foregoing actions or take any action which would:

      - make any of the representations or warranties contained in the Phelps
        Dodge Merger Agreement untrue or incorrect, or

      - result in any of the conditions to the Phelps Dodge Merger set forth in
        the Phelps Dodge Merger Agreement not being satisfied.

     - Investigation.  The parties have agreed that, subject to applicable laws
       or regulations, prior to the time the Phelps Dodge Merger becomes
       effective the parties will afford one another's authorized
       representatives full and complete access to each party's properties,
       books, contracts, commitments and records and any document filed or
       received by them pursuant to applicable securities laws. Also, the
       parties will each use their reasonable best efforts to cause their
       representatives to furnish promptly to one another any additional
       information about their respective businesses and properties as the other
       or its duly authorized representatives may reasonably request. However,
       neither will be required to disclose information to the other that would
       cause significant competitive harm to the disclosing party or its
       affiliates if the Phelps Dodge Merger is not completed. All confidential
       information obtained by Phelps Dodge or Cyprus Amax will be kept
       confidential. Confidential information will be used only in connection
       with consummating the transactions contemplated by the Phelps Dodge
       Merger Agreement.

STOCKHOLDER APPROVALS AND OTHER COOPERATION

     The parties have agreed to:

     - prepare and file with the SEC, as soon as is reasonably practicable, an
       information statement to be sent to Cyprus Amax after the Amended Offer;

     - use reasonable best efforts to have the information statement cleared by
       the SEC;

     - amend as necessary the registration statement of which this prospectus is
       a part;

     - as soon as is reasonably practicable, take all actions required under
       state blue sky or securities laws in connection with the issuance of
       shares of Phelps Dodge Common Stock in the Phelps Dodge Merger;

     - promptly prepare and file stock exchange listing applications covering
       the shares of Phelps Dodge Common Stock issuable under the Phelps Dodge
       Merger Agreement and use their reasonable best efforts to obtain, prior
       to the time the Phelps Dodge Merger becomes effective, approval for the
       listing of Phelps Dodge Common Stock, subject only to official notice of
       issuance;

     - cooperate with one another in order to lift any injunctions or remove any
       other impediment to the consummation of the contemplated transactions;
       and

     - cooperate with one another in obtaining opinions of Shearman & Sterling,
       special counsel to Phelps Dodge, and Wachtell, Lipton, Rosen & Katz,
       special counsel to Cyprus Amax, concerning certain tax matters.
                                        7
<PAGE>   9

     Each party has also agreed:

     - that Cyprus Amax will cause the information statement to be mailed to its
       stockholders as promptly as practicable after it is cleared by the SEC;

     - as soon as practicable following the date of the Phelps Dodge Merger
       Agreement, to duly call and hold a meeting of its stockholders to obtain
       approval of the Phelps Dodge Merger and the other contemplated
       transactions;

     - subject to its ability to change its recommendation as described under
       "--No Solicitation of Alternative Takeover Proposals" below, through its
       boards of directors, to recommend to its stockholders that it approves
       the Phelps Dodge Merger and the other contemplated transactions;

     - to use its best efforts to hold its stockholders meetings as soon as
       practicable after the date of the Phelps Dodge Merger Agreement;

     - that Phelps Dodge shall vote, or cause to be voted, all of the Cyprus
       Amax Common Stock then owned by it or any of its subsidiaries or over
       which it has direct or indirect voting authority in favor of the approval
       of the Phelps Dodge Merger and of the approval and adoption of the Phelps
       Dodge Merger Agreement;

     - that after Purchaser has purchased shares of Cyprus Amax Common Stock
       through the Amended Offer, Phelps Dodge will be entitled to designate a
       number of directors on the Cyprus Amax Board that will give Phelps Dodge
       a percentage of representation on the Cyprus Amax Board equal to the
       percentage of shares of Cyprus Amax Common Stock that it then owns; and

     - that the obligation of Phelps Dodge to obtain approvals under antitrust
       laws is unconditional and is not qualified by best efforts.

     In addition, the Phelps Dodge Merger Agreement contains general covenants
requiring each party to take any further action necessary or desirable to carry
out the purposes of the Phelps Dodge Merger Agreement and to use reasonable
efforts to take all actions necessary, proper or advisable to consummate the
contemplated transactions. These general requirements are limited so that
neither party will be required to undertake divestitures which would have
material adverse effects on the companies.

NO SOLICITATION OF ALTERNATIVE TAKEOVER PROPOSALS

     Cyprus Amax agreed that it will not, nor will it permit any of its
subsidiaries to, authorize or permit any of its respective directors, officers,
employees or any representative retained by Cyprus Amax or any of its
subsidiaries to, directly or indirectly through another person:

     - solicit, initiate or encourage (whether by furnishing information or
       otherwise), or take any other action designed to facilitate, any
       inquiries or the making of any proposal which constitutes or reasonably
       could be expected to lead to any Takeover Proposal (as defined below), or

     - participate in any discussions or negotiations regarding any Takeover
       Proposal.

     A "Takeover Proposal" means, other than the transactions contemplated by
the Phelps Dodge Merger Agreement,

     - any inquiry, proposal or offer, or any improvement, restatement,
       amendment, renewal or reiteration of any such inquiry, proposal or offer,
       from any person relating to any direct or indirect acquisition of a
       business or equity securities of Cyprus Amax or any of its subsidiaries,

     - any tender offer or exchange offer that if consummated would result in
       any person beneficially owning any class of equity securities of Cyprus
       Amax or any of its subsidiaries, or

     - any merger, consolidation, business combination, recapitalization,
       liquidation, dissolution or similar transaction involving Cyprus Amax or
       any of its subsidiaries.

                                        8
<PAGE>   10

     Except as provided in the next two paragraphs, neither the board of
directors of Cyprus Amax nor any committee of such board will do any of the
following:

     - withdraw or modify, or propose publicly to withdraw or modify, in a
       manner adverse to the other party, the approval or recommendation by the
       board of directors or any committee, of the Phelps Dodge Merger or the
       Phelps Dodge Merger Agreement,

     - approve or recommend, or propose publicly to approve or recommend, any
       Takeover Proposal, or

     - cause Cyprus Amax to enter into any letter of intent, agreement in
       principle, acquisition agreement or other similar agreement related to
       any Takeover Proposal.

     However, if the board of directors of Cyprus Amax receives a Takeover
Proposal and the board of directors of Cyprus Amax determines in good faith,
after consultation with outside counsel and its financial advisor that such
Takeover Proposal is reasonably capable of being completed, taking into account
all legal, financial, regulatory and other aspects of the proposal and would, if
consummated, result in a transaction more favorable to Cyprus Amax shareholders
than the transaction contemplated by the Phelps Dodge Merger Agreement, the
board of directors of Cyprus Amax may (x) take any of the actions described
above or (y) terminate the Phelps Dodge Merger Agreement (and concurrently with
or after such termination, if it so chooses, cause Cyprus Amax to enter into any
Acquisition Agreement with respect to any Takeover Proposal) but only after the
fifth business day following Phelps Dodge's receipt of written notice advising
Phelps Dodge that the board of directors of Cyprus Amax is prepared to accept a
Takeover Proposal, specifying the material terms and conditions of such Takeover
Proposal and identifying the person making such Takeover Proposal.

     Notwithstanding any subsequent determination by the Board of Directors of
Cyprus Amax to change such recommendation, the Phelps Dodge Merger Agreement
shall be submitted to the stockholders of Cyprus Amax at the Cyprus Amax
stockholder meeting for the purpose of obtaining the Cyprus Amax stockholder
approval and nothing contained in the Phelps Dodge Merger Agreement shall be
deemed to relieve Cyprus Amax of such obligation.

     The Phelps Dodge Merger Agreement does not prohibit the parties

     - from taking and disclosing to their respective stockholders a position
       with respect to a tender offer required by law, or

     - from making any disclosure to their respective stockholders if, in the
       good faith judgment of the board of directors, after consultation with
       outside counsel, failure to disclose would be inconsistent with its
       obligations under applicable law.

     Each of the parties has agreed to notify promptly the other party orally
and in writing of any request for information or of any Takeover Proposal, the
material terms and conditions of such request or proposal and the identity of
the person making such request or proposal, and will keep the other party
reasonably informed of the status and details of any such request or proposal.

STOCK OPTIONS AND OTHER STOCK-BASED AWARDS

     Simultaneously with the Phelps Dodge Merger, each outstanding option to
purchase Cyprus Amax Common Stock and related stock appreciation right (SAR), if
any, will be converted into an option (together with an SAR, if applicable) to
acquire the number of shares of Phelps Dodge Common Stock equal to the number of
shares of Cyprus Amax Common Stock which could have been obtained upon the
exercise of the option immediately prior to the time the Phelps Dodge Merger
becomes effective multiplied by the Cyprus Amax stock consideration.

     In the case of an option to purchase Cyprus Amax Common Stock, the exercise
price per share of Phelps Dodge Common Stock will be adjusted to equal the
exercise price for such option as in effect immediately prior to the time the
Phelps Dodge Merger becomes effective divided by the Cyprus Amax stock
consideration. Phelps Dodge will assume the obligations of Cyprus Amax with
respect to such options. Phelps Dodge will assume the obligations of Cyprus Amax
under their respective option plans and, except as

                                        9
<PAGE>   11

described above, the terms of such options (and SARs) shall continue to apply in
accordance with the terms of the plans and agreements under which they were
issued, including any provisions for acceleration.

     Simultaneously with the Phelps Dodge Merger, each outstanding award
(including restricted stock, performance units, shares units and performance
shares) under any employee incentive or benefit plan or arrangement and
non-employee director plan presently maintained by Cyprus Amax will be converted
into a similar instrument of Phelps Dodge, with appropriate adjustments to
preserve the inherent value of the awards with no detrimental effects on the
holders. The other terms of each award will continue to apply, including any
provisions which the restrictions will have lapsed on or prior to the time the
Phelps Dodge Merger becomes effective. Shares of such previously restricted
stock will be converted in accordance with the conversion provisions applicable
to other shares of common stock.

     Following the completion of the business combination, Phelps Dodge will
reserve for issuance and delivery a sufficient number of shares of Phelps Dodge
Common Stock upon the exercise of any Cyprus Amax stock options.

BENEFITS MATTERS

     It is the intention of the parties that for a period of one year following
the completion of the business combination, Phelps Dodge will maintain the
employee benefit plans of Cyprus Amax generally in accordance with their terms
in effect at the completion of the business combination, with only amendments
that are required by applicable law or permitted by the terms of that agreement,
and which do not adversely affect the rights of participants under such
agreement. In addition, following the completion of the business combination,
Phelps Dodge will guarantee the performance of certain existing employment
agreements and benefit plans of Cyprus Amax.

     Phelps Dodge has also agreed that it will

     - waive any limitations regarding pre-existing conditions and eligibility
       waiting periods under any welfare or employee benefit plan maintained by
       Cyprus Amax following the completion of the business combination;

     - provide employees of Cyprus Amax with credit for any co-payments and
       deductibles paid in the calendar year prior to the completion of the
       business combination; and

     - generally, treat all service by employees of Cyprus Amax prior to the
       completion of the business combination as service with Phelps Dodge under
       all compensation and benefit plans and policies of Cyprus Amax.

INDEMNIFICATION; DIRECTORS' AND OFFICERS' INSURANCE

     Phelps Dodge has agreed that all exculpation and indemnification provisions
now existing in favor of the current or former directors or officers of Cyprus
Amax as provided in its charter or bylaws or in any agreement will survive the
business combination. Phelps Dodge has agreed that, for six years from the time
the business combination becomes effective, it will indemnify such indemnified
parties to the same extent as they were entitled while working on behalf of
Cyprus Amax.

     Phelps Dodge has also agreed that, for three years from the time the
business combination becomes effective, it will maintain in effect Cyprus Amax's
current directors' and officers' liability insurance policies for those persons
who are currently covered by the policies. However, Phelps Dodge will not be
required to expend in any one year more than 150% of the annual premiums
currently paid by Cyprus Amax. If the annual premiums of such insurance coverage
exceed the 150% limit, Phelps Dodge only will be obligated to obtain a policy
with the greatest coverage available for a cost not exceeding the limit. Phelps
Dodge is entitled to meet its obligations under this paragraph by covering the
relevant persons under its own insurance policies.

                                       10
<PAGE>   12

LITIGATION

     Prior to the effective time of the merger, each of the parties will
terminate all litigation commenced against the other in connection with the
business combination and the Phelps Dodge exchange offer for Cyprus Amax shares.
Each party will also use its reasonable best efforts to have lawsuits commenced
by third parties in connection with those transactions to be dismissed with
prejudice.

CONDITIONS PRECEDENT TO THE PHELPS DODGE MERGER

     The Phelps Dodge Merger Agreement contains certain conditions to both
parties' obligations to complete the Phelps Dodge Merger. Neither party will be
obligated to complete the business combination unless at or prior to the time
the business combination becomes effective:

     - Stockholder Approval.  The approval of the stockholders of Phelps Dodge
       and Cyprus Amax have been obtained in accordance with applicable law.

     - Legality.  No statute, rule, regulation, executive order, decree, ruling
       or injunction by any tribunal or governmental authority prohibits the
       consummation of the Phelps Dodge Merger substantially on the terms
       contemplated by the Phelps Dodge Merger Agreement.

     - The Purchaser shall have accepted for exchange all shares of Cyprus Amax
       Common Stock validly tendered and not withdrawn pursuant to the Amended
       Offer; provided, however, that this condition shall not be applicable to
       the obligations of the Purchaser if, in breach of the Phelps Dodge Merger
       Agreement, the Purchaser fails to accept for exchange and exchange any
       such shares validly tendered and not withdrawn pursuant to such offer.

TERMINATION

     The Phelps Dodge Merger Agreement may be terminated at any time prior to
the time the Phelps Dodge Merger becomes effective, in any of the following
circumstances:

     - by our mutual written consent;

     - by either of the parties if, without fault of either terminating party,
       the purchase of Cyprus Amax Common Stock pursuant to the Amended Offer
       has not occurred on or before March 31, 2000, which date can be extended
       by mutual written consent;

     - by either of the parties if the Amended Offer expires or is terminated or
       withdrawn without any Cyprus Amax Common Stock being purchased;

     - by either of the parties if a court or governmental body has issued an
       order (other than a temporary restraining order) enjoining or prohibiting
       the purchase of Cyprus Amax Common Stock pursuant to the Amended Offer or
       the Phelps Dodge Merger, if such order has become final and
       nonappealable, so long as the party seeking to terminate has used its
       reasonable best efforts to remove or lift such order; or a statute, rule,
       regulation, order, injunction or decree has been enacted, entered or
       promulgated which prohibits or makes illegal the consummation of the
       Phelps Dodge Merger substantially on the terms contemplated by the Phelps
       Dodge Merger Agreement, and which order, injunction, or decree has become
       final and nonappealable; or there shall have been a failure to obtain any
       required consent or approval under foreign laws or regulations which
       would prohibit consummation of the Amended Offer or the Phelps Dodge
       Merger or would have a material adverse effect on Phelps Dodge or Cyprus
       Amax;

     - by the Phelps Dodge board of directors, at any time prior to the purchase
       of any shares of Cyprus Amax Common Stock pursuant to the Amended Offer,
       if (i) the Board of Cyprus Amax or any committee thereof shall have
       withdrawn or modified in a manner which is adverse to Phelps Dodge its
       approval or recommendation of the Amended Offer or the Phelps Dodge
       Merger Agreement, (ii) the Cyprus Amax board shall have recommended
       another Takeover Proposal, (iii) there is a public disclosure of another
       Takeover Proposal and the Minimum Tender Condition is not satisfied, or

                                       11
<PAGE>   13

       (iv) the representations and warranties of Cyprus Amax are not correct as
       of the date of the Prospectus dated October 1, 1999 and as of the
       expiration date as though made on and as of the date of the Prospectus
       and the expiration date of the Amended Offer except where the failure of
       such representations and warranties to be so true and correct would not
       reasonably be expected to have, individually or in the aggregate, a
       Material Adverse Effect on Cyprus Amax; and Cyprus Amax shall have
       performed or complied in all material respects with all the material
       agreements and covenants required by the Phelps Dodge Merger Agreement
       and such condition is not satisfied within 30 days of notice;

     - by Cyprus Amax, at any time prior to the acceptance for payment shares of
       Cyprus Amax Common Stock under the Amended Offer if there is a material
       breach of any of Phelps Dodge's representations, warranties or covenants
       contained in the Phelps Dodge Merger Agreement which is not cured within
       10 days of notice; and

     - by Cyprus Amax in accordance with the provisions described under the
       caption "-- No Solicitation of Alternative Takeover Proposals"; provided
       that Cyprus Amax shall have complied with all provisions of such section
       and shall have paid the termination fee described below to Phelps Dodge.

CLOSING

     The closing of the Phelps Dodge Merger will take place within two business
days after the later of the Phelps Dodge stockholder meeting and the Cyprus Amax
stockholder meeting.

TERMINATION FEES

     Cyprus Amax is liable to Phelps Dodge for a termination fee of $45 million
if the Phelps Dodge Merger Agreement is terminated under certain circumstances.

     In general, the termination fee is payable by Cyprus Amax if:

     - prior to the date of the Cyprus Amax stockholder meeting a Takeover
       Proposal is made known to Cyprus Amax or is made directly to its
       stockholders generally or any person has publicly announced an intention
       (whether or not conditional) to make a Takeover Proposal and thereafter
       the Phelps Dodge Merger Agreement is terminated by either party pursuant
       to certain specified provisions of the Phelps Dodge Merger Agreement.

     However, no termination fee is payable unless within eighteen months of the
termination, Cyprus Amax or any of its subsidiaries enters into an agreement for
or consummates a transaction whereby a third party acquires twenty percent of
any class of stock of Cyprus Amax and its subsidiaries, or a business that
constitutes twenty percent or more of the revenues, net income or assets of the
Cyprus Amax, or otherwise consummates a Takeover Proposal.

     The Phelps Dodge Merger Agreement also provides that if Cyprus Amax fails
to pay any termination fee which is judged to be due, Cyprus must pay the costs
and expenses of any action taken to collect payment, together with interest on
the termination fee.

     In addition, in the event the Phelps Dodge Merger Agreement is terminated
under certain circumstances, Phelps Dodge will reimburse Cyprus Amax for the
termination fee that has been paid to ASARCO Incorporated pursuant to an
agreement and plan of merger between Cyprus Amax, Asarco Incorporated and other
parties, dated as of July 15, 1999, or under the amendment to such merger
agreement, dated September 27, 1999. There will be no reimbursement if the
termination is a result of a breach by Cyprus Amax or if the termination is in
connection with a Takeover Proposal for Cyprus Amax other than by Phelps Dodge.

                                       12
<PAGE>   14

COSTS AND EXPENSES

     Each of the parties will pay their own costs and expenses in connection
with the Phelps Dodge Merger Agreement and the contemplated transactions whether
or not the Phelps Dodge Merger is completed, except that the parties will
equally share

     - the filing fee in connection with any HSR Act filing or any other
       required statutory approval;

     - the commissions and other out-of-pocket transaction costs, including the
       expenses and compensation of the exchange agent, incurred in connection
       with the sale of shares of Phelps Dodge Common Stock to generate cash to
       pay in lieu of fractional shares; and

     - all transfer taxes.

AMENDMENT

     At any time prior to the time the Phelps Dodge Merger becomes effective, we
may amend or supplement any of the terms of the Phelps Dodge Merger Agreement in
writing by both of us, provided that, following the purchase of Cyprus Amax
Common Stock pursuant to the Amended Offer, the Phelps Dodge Merger Agreement
shall not be supplemented or amended unless such supplement or amendment is
approved by a vote of the majority of "continuing directors" of Cyprus Amax, and
provided further that following approval by our respective stockholders we may
not amend or change any provision relating to the Merger Consideration or make
any other change not permitted under applicable law without further approval by
the Cyprus Amax stockholders.

WAIVER

     At any time prior to the effective time, the Phelps Dodge Merger Agreement
permits either party in writing to:

     - extend the time for the performance of any of the obligations or other
       acts of the other party;

     - waive any inaccuracies in the representations and warranties of the other
       party; and

     - waive compliance with any of the agreements or conditions of the other
       party contained in the Phelps Dodge Merger Agreement.

ITEM 4.  THE SOLICITATION OR RECOMMENDATION.

     On September 27, 1999, Cyprus Amax entered into Amendment No. 1 to the
Merger Agreement with ASARCO ("Amendment No. 1 to the ASARCO Merger Agreement"),
which permitted Cyprus Amax and ASARCO to independently explore alternatives to
the ASARCO Merger Agreement. Amendment No. 1 to the ASARCO Merger Agreement was
filed as Exhibit 23 to Amendment No. 6 to Cyprus Amax's Schedule 14D-9. On
September 28, 1999, Milton H. Ward, Chairman, President and Chief Executive
Officer of Cyprus Amax, contacted Douglas C. Yearley, Chairman and Chief
Executive Officer of Phelps Dodge, to discuss the possibility of a two-way
business combination between Cyprus Amax and Phelps Dodge. (Messrs. Ward and
Yearley had previously met on September 24, 1999, along with Francis R.
McAllister, Chief Executive Officer of ASARCO, to discuss the possibility of a
three-way business combination among Cyprus Amax, ASARCO and Phelps Dodge.) From
September 28, 1999 to the morning of September 30, 1999, representatives of
Cyprus Amax and Phelps Dodge and their respective financial and legal advisors
negotiated the terms, including the proposed exchange ratio and cash portion, of
the proposed merger agreement. Also during this period, representatives of
Cyprus Amax and its financial advisor had contacts with other potential partners
for a business combination.

     On September 30, 1999, the Cyprus Amax Board of Directors held a special
meeting to consider the proposed two-way business combination with Phelps Dodge.
At the meeting, (1) Mr. Ward and other officers of Cyprus Amax reviewed the
status of the transaction and discussed with the directors the reasons for the
transaction, (2) representatives of Merrill Lynch, Pierce, Fenner & Smith
Incorporated ("Merrill Lynch") made a financial presentation concerning the
transaction and (3) Cyprus Amax's legal advisors outlined the
                                       13
<PAGE>   15

terms of the proposed transaction. Merrill Lynch rendered its opinion that, as
of such date, and based upon and subject to the matters set forth in their
opinion, the consideration to be received by Cyprus Amax stockholders in the
Amended Offer and the Phelps Dodge Merger is fair from a financial point of view
to such holders. At the special meeting, the Cyprus Amax Board of Directors
approved and adopted the Phelps Dodge Merger Agreement and the related
transactions by the unanimous vote of the directors present.

     In reaching its conclusion described above, the Cyprus Amax Board of
Directors considered the following factors, among others:

     1. At a meeting held on September 8, 1999, the Cyprus Amax Board had
        unanimously determined that the Phelps Dodge Offer was inadequate and
        not in the best interests of Cyprus Amax and its stockholders. The basis
        for the Board's rejection of the Phelps Dodge Offer was set forth in the
        Schedule 14D-9. The price of $7.61 in cash and 0.2203 shares of Phelps
        Dodge Common Stock per share of Cyprus Amax Common Stock provided by the
        Amended Offer and the Phelps Dodge Merger Agreement represents a
        substantial increase over the price of 0.3135 shares of Phelps Dodge
        Common Stock per share of Cyprus Amax Common Stock provided by the
        Phelps Dodge Offer that the Board rejected on September 8, 1999.

     2. The Board reviewed the possible alternatives to the Phelps Dodge Merger,
        including the potential merger with ASARCO, the value to stockholders of
        such alternatives and the timing and likelihood of achieving additional
        value from these alternatives, and the possibility that equally suitable
        partners for merger and consolidation would be available. In this
        connection, the Board considered the fact that, since the execution of
        Amendment No. 1 to the ASARCO Merger Agreement, representatives of
        Cyprus Amax had contacted certain third parties who, it was believed,
        might have a potential interest in a transaction with Cyprus Amax, and
        the Board considered the responses to such inquiries. The Board of
        Directors concluded that the Phelps Dodge Merger was superior to any
        alternatives and that, if a superior alternative did become available,
        Cyprus Amax would be able to pursue such an alternative under the terms
        of the Phelps Dodge Merger Agreement. The Board of Directors considered
        the course of discussions and negotiations with ASARCO up to the date of
        the September 30 meeting of the Board, along with other facts and
        circumstances such as the offer made on September 27, 1999 by Grupo
        Mexico for ASARCO.

     3. The Board considered the pending offer by Phelps Dodge for ASARCO and
        the effect that such a combination would have on a combined Phelps
        Dodge/Cyprus Amax.

     4. The Board considered the fact that the Amended Offer and Phelps Dodge
        Merger provided stockholders of Cyprus Amax the opportunity to receive a
        premium for their shares, and, in addition, the stockholders of Cyprus
        Amax could elect to continue to hold shares representing an equity
        interest in the combined company, and that there exists no controlling
        stockholder of Phelps Dodge now or immediately after the Phelps Dodge
        Merger. In this connection, the Board of Directors considered that
        Cyprus Amax stockholders would own approximately 25.6% of the shares of
        the combined Phelps Dodge/Cyprus Amax.

     5. The Board reviewed the opinion of Merrill Lynch, Cyprus Amax's financial
        advisor, that, as of the date of such opinion, and based upon and
        subject to the factors and assumptions set forth in the opinion, the
        consideration to be received by Cyprus Amax stockholders in the Amended
        Offer and the Phelps Dodge Merger is fair from a financial point of view
        to such holders.

     6. The Board considered that Phelps Dodge had already received United
        States antitrust approval for the acquisition.

     7. The Board considered that the transaction with Phelps Dodge was expected
        to be immediately and substantially accretive to cash flow and earnings
        per share for Cyprus Amax shareholders who receive Phelps Dodge shares
        in exchange for their Cyprus Amax Common Stock, and that the
        consideration to be received by Cyprus Amax stockholders indicated that
        the synergies being contributed to the combined company by Cyprus Amax
        were being recognized in the exchange ratio and cash portion of the
        Amended Offer and the merger consideration.

                                       14
<PAGE>   16

     8. The Board considered the business combination with Phelps Dodge as an
        opportunity to improve stockholder value as a result of becoming a
        world-class, lower-cost global copper producer with significant
        opportunities to integrate operations in the southwestern United States,
        administrative functions, and exploration and development activities.

     Cyprus Amax's Board of Directors also considered certain countervailing
factors in its deliberations concerning the Phelps Dodge Merger, including:

     1.  The Board considered that Cyprus Amax was required to pay a termination
         fee of $45 million to ASARCO under Amendment No. 1 to the ASARCO Merger
         Agreement (the "ASARCO Termination Fee") in order to be free to enter
         into the Phelps Dodge Merger Agreement.

     2.  The Board reviewed the terms and conditions of the Phelps Dodge Merger
         Agreement, including the following:

        - The Board considered the provision under the Phelps Dodge Merger
          Agreement that provided that Phelps Dodge would reimburse Cyprus Amax
          for the ASARCO Termination Fee if the Phelps Dodge Merger Agreement is
          terminated under circumstances specified in the Phelps Dodge Merger
          Agreement, but that the ASARCO Termination Fee would not be reimbursed
          to Cyprus Amax under all circumstances of termination of the Phelps
          Dodge Merger Agreement.

        - The Board considered the requirement under the Phelps Dodge Merger
          Agreement that Cyprus Amax pay to Phelps Dodge a termination fee of
          $45 million if the Phelps Dodge Merger Agreement is terminated under
          circumstances specified in the Phelps Dodge Merger Agreement.

        While the Board thought that these provisions could result in
        significant fees to be borne by Cyprus Amax, it accepted these
        provisions as a means to obtain other terms favorable to Cyprus Amax, in
        particular the right to negotiate or exchange information with potential
        bidders and the right to terminate the Phelps Dodge Merger Agreement, in
        each case, in the event of an alternative transaction that the Board
        determined was superior to the transaction with Phelps Dodge.

     Following the approval of the Cyprus Amax Board of Directors, on September
30, 1999, Cyprus Amax terminated the ASARCO Merger Agreement and immediately
thereafter Cyprus Amax and Phelps Dodge executed the Phelps Dodge Merger
Agreement and issued a joint press release.

ITEM 5.  PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED.

     Pursuant to the terms of a letter agreement dated September 30, 1999,
relating to the financial advisory services provided by Merrill Lynch, Cyprus
Amax has agreed to pay Merrill Lynch as follows: (1) a cash fee of $750,000,
which was payable upon the date of the letter agreement with Merrill Lynch and
(2) a cash fee of $10.5 million upon consummation of the Phelps Dodge Offer;
provided that any fee previously paid to Merrill Lynch pursuant to clause (1)
will be deducted from any fee to which Merrill Lynch is entitled pursuant to
clause (2). Cyprus Amax has also agreed to reimburse Merrill Lynch for its
reasonable out-of-pocket expenses, including the reasonable fees and
disbursements of legal counsel, and to indemnify Merrill Lynch and certain
related parties from and against certain liabilities, including liabilities
under the federal securities laws, arising out of its engagement.

ITEM 6.  RECENT TRANSACTIONS AND INTENT WITH RESPECT TO SECURITIES.

     (b) To the best of Cyprus Amax's knowledge, all of Cyprus Amax's executive
officers, directors and affiliates currently intend to tender all shares of
Cyprus Amax Common Stock that are owned beneficially or held of record by such
persons.

ITEM 8.  ADDITIONAL INFORMATION TO BE FURNISHED.

     The special meeting of Cyprus Amax's stockholders that had been scheduled
for September 30, 1999 and then postponed until October 7, 1999 has been
canceled.

                                       15
<PAGE>   17

     Cyprus Amax and Phelps Dodge have agreed to take certain action with
respect to the currently pending litigation between them. See Item 3 above.

ITEM 9.  MATERIAL TO BE FILED AS EXHIBITS.

     Item 9 of the Schedule 14D-9 is hereby amended and restated as follows:

<TABLE>
<S>          <C>
Exhibit 1:   Pages 62, 64-66, 72-73 and 79 in the Joint Proxy
             Statement/Prospectus and page 13 in the Asarco Cyprus 8-K.**
Exhibit 2:   Pages 11-22 in the Annual Proxy Statement.**
Exhibit 3:   Press release issued by Cyprus Amax and ASARCO, dated
             September 9, 1999.**
Exhibit 4:   Letter to Stockholders of Cyprus Amax, dated September 9,
             1999.* **
Exhibit 5:   Complaint filed in Phelps Dodge v. ASARCO et al., Superior
             Court of New Jersey Chancery Division: Mercer County, August
             27, 1999.**
Exhibit 6:   Complaint filed in Sterns v. McAllister et al., Superior
             Court of New Jersey Chancery Division: Mercer County, August
             24, 1999.**
Exhibit 7:   Complaint filed in Greenfield v. Osborne, et al., Superior
             Court of New Jersey Chancery Division: Mercer County, August
             25, 1999.**
Exhibit 8:   Complaint filed in Steiner v. Cyprus Amax et al., Court of
             Chancery of the State of Delaware in and for New Castle
             County, August 23, 1999.**
Exhibit 9:   Complaint filed in Miller v. Cyprus Amax et al., Court of
             Chancery of the State of Delaware in and for New Castle
             County, August 23, 1999.**
Exhibit 10:  Complaint filed in Bruno v. Stookey et al., Court of
             Chancery of the State of Delaware in and for New Castle
             County, August 24, 1999.**
Exhibit 11:  Complaint filed in Green v. Stookey et al., Court of
             Chancery of the State of Delaware in and for New Castle
             County, August 24, 1999.**
Exhibit 12:  Complaint filed in Lifshitz v. Stookey et al., Court of
             Chancery of the State of Delaware in and for New Castle
             County, August 24, 1999.**
Exhibit 13:  Complaint filed in Klotz v. Ward et al., Court of Chancery
             of the State of Delaware in and for New Castle County,
             August 24, 1999.**
Exhibit 14:  Complaint filed in Grill v. Stookey, et al., Court of
             Chancery of the State of Delaware in and for New Castle
             County, August 26, 1999.**
Exhibit 15:  Complaint filed in Phelps Dodge v. Cyprus Amax, et al.,
             Court of Chancery for the State of Delaware in and for New
             Castle County, August 27, 1999.**
Exhibit 16:  Letter from Cyprus Amax and ASARCO to shareholders, dated
             September 10, 1999.**
</TABLE>

<TABLE>
<S>          <C>
Exhibit      Newspaper Advertisement by Cyprus Amax and ASARCO, dated
  17:......  September 10, 1999.**
Exhibit 18:  Investor Presentation by Cyprus Amax and ASARCO.**
Exhibit 19:  Newspaper Advertisement by Cyprus Amax and ASARCO, dated
             September 17, 1999.**
Exhibit 20:  Letter from Cyprus Amax and ASARCO to shareholders, dated
             December 20, 1999.**
Exhibit 21:  Investor Presentation by Cyprus Amax and ASARCO.**
Exhibit 22:  Press release issued by Cyprus Amax, dated September 27,
             1999.**
Exhibit 23:  Amendment No. 1, dated as of September 27, 1999, to
             Agreement and Plan of Merger, dated July 15, 1999, among
             Asarco Cyprus Incorporated, ACO Acquisition Corp., CAM
             Acquisition Corp., ASARCO and Cyprus Amax.**
Exhibit 24:  Press release issued by Cyprus Amax, dated September 28,
             1999.**
Exhibit 25:  Letter to Stockholders of Cyprus Amax, dated October 1,
             1999.+
Exhibit 26:  Press release issued by Cyprus Amax and Phelps Dodge, dated
             September 30, 1999.
Exhibit 27:  Agreement and Plan of Merger, dated as of September 30,
             1999, among Phelps Dodge, CAV Corporation and Cyprus Amax.
Exhibit 28:  Opinion of Merrill Lynch, Pierce, Fenner & Smith
             Incorporated, dated September 30, 1999.+
</TABLE>

- ---------------

*  Included with Schedule 14D-9 mailed to stockholders.

+  Included with Amendment No. 7 to the 14D-9 mailed to stockholders.

** Previously Filed.

                                       16
<PAGE>   18

                                   SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this Statement is true, complete and
correct.

                                          CYPRUS AMAX MINERALS COMPANY

                                          By: /s/ PHILIP C. WOLF

                                            ------------------------------------
                                            Philip C. Wolf
                                            Senior Vice President,
                                            General Counsel and Secretary

Dated: October 1, 1999

                                       17

<PAGE>   1

                      [CYPRUS AMAX MINERALS COMPANY LOGO]

                                                                      EXHIBIT 25

                                                                 October 1, 1999

Dear Fellow Shareholder:

     On September 30, 1999, the Company entered into a definitive merger
agreement with Phelps Dodge Corporation providing for the acquisition of Cyprus
Amax for $7.61 in cash and 0.2203 Phelps Dodge shares per Cyprus Amax share on a
fully prorated basis. Each Cyprus Amax shareholder will have the right to elect
to receive cash or Phelps Dodge shares for each Cyprus Amax share held. The
all-cash election for Cyprus Amax shareholders is $20.54 per Cyprus Amax share
and the all-stock election is 0.35 Phelps Dodge shares per Cyprus Amax share,
subject to proration to maintain the overall cash/stock allocation.

     Under the terms of the agreement, any shares not tendered and purchased by
Phelps Dodge in the exchange offer will be acquired in a subsequent merger, all
as explained in the enclosed offering materials.

     Your Board of Directors approved the exchange offer and the merger with
Phelps Dodge by the unanimous vote of the directors present. The Board
recommends that all holders of Cyprus Amax common stock tender their shares
pursuant to the exchange offer.

     Enclosed with this letter are copies of Phelps Dodge's amended offering
materials, which set forth the terms and conditions of the exchange offer and
provide instructions as to how to tender your shares. Also enclosed is a copy of
an amendment to Cyprus Amax's Solicitation/Recommendation Statement on Schedule
14D-9, which contains a description of the merger agreement with Phelps Dodge
and the reasons for your Board's recommendation. All of these documents contain
important information which you should read carefully.

                                          [/s/ MILTON H. WARD]
                                          MILTON H. WARD
                                          Chairman, President and
                                          Chief Executive Officer

<PAGE>   1

                                                                         EX-99.1
                                                                   PRESS RELEASE

                             FOR IMMEDIATE RELEASE

PHELPS DODGE CONTACTS:

INVESTORS                                        MEDIA
     Phelps Dodge                                Phelps Dodge
     Thomas M. Foster                            Susan M. Suver
     (602) 234-8139                              (602) 234-8003
     Gregory W. Stevens
     (602) 234-8166

Arthur Schmidt & Associates, Inc.                Sard Verbinnen & Co
     Martin Zausner/Alan Weinstein/Joan Harper   George Sard/David Reno/
     (212) 953-5555                                Paul Caminiti
                                                 (212) 687-8080
CYPRUS AMAX CONTACTS:
     Cyprus Amax
     John Taraba
     (303) 643-5244
     Gerald J. Malys
     (303) 643-5060

                      PHELPS DODGE TO ACQUIRE CYPRUS AMAX

                            ------------------------

     PHOENIX, AZ and DENVER, CO, September 30, 1999 -- Phelps Dodge Corporation
(NYSE: PD) and Cyprus Amax Minerals Company (NYSE: CYM) today announced they
have signed a definitive merger agreement under which Phelps Dodge will acquire
Cyprus Amax for $7.61 in cash and 0.2203 Phelps Dodge shares per Cyprus Amax
share on a fully prorated basis.

     Phelps Dodge is amending its exchange offer for Cyprus Amax, which will now
be scheduled to expire at midnight on October 15, 1999. Cyprus Amax shareholders
will have the right to elect to receive cash or Phelps Dodge shares for each
Cyprus Amax share. The all-cash election for Cyprus Amax shareholders is $20.54
per Cyprus Amax share and the all-stock election is 0.3500 Phelps Dodge shares
per Cyprus Amax share, subject to proration to maintain the overall cash/stock
allocation of approximately 63% stock and 37% cash. The stock portion of the
consideration received will be tax-free to Cyprus Amax shareholders.

     Based on Phelps Dodge's closing share price yesterday, the agreement
currently values Cyprus Amax at $19.80 per share, or a total equity value of
approximately $1.8 billion, based on approximately 90.7 million Cyprus Amax
shares outstanding.

     Phelps Dodge expects the transaction to be immediately and substantially
accretive to its cash flow per share and accretive to its earnings per share
beginning in 2001, based on the current portfolio of the combined companies and
analysts' estimates of copper prices of $0.80 to $0.85 per pound in 2001. Based
on its strong balance sheet, Phelps Dodge expects to finance the $690 million
cash portion of the offer through existing credit facilities and cash on hand.

     Phelps Dodge has already received U.S. antitrust approval for the
acquisition. Completion of the exchange offer is subject to a majority of Cyprus
Amax's shares being tendered and not withdrawn, approval of Phelps Dodge
shareholders at a special meeting on October 13, 1999, and customary closing
conditions.
<PAGE>   2

     Prior to entering into the agreement with Phelps Dodge, Cyprus Amax
terminated its merger agreement with Asarco Incorporated (NYSE: AR) in
accordance with the procedures agreed to with Asarco earlier this week.

     The combination of Phelps Dodge and Cyprus Amax will create a world-class,
lower-cost global copper producer and provide significant opportunities to
integrate operations in the southwestern United States, administrative
functions, and exploration and development activities. Consistent with
demonstrated Phelps Dodge standards, all properties will be operated to earn
more than the cost of capital over the copper cycle.

     "We are extremely pleased that we were able to reach a negotiated agreement
with Cyprus Amax that is clearly in the best interest of both companies," said
Douglas C. Yearley, Chairman and Chief Executive Officer of Phelps Dodge. "We
will move quickly to close this compelling transaction and to begin realizing
the strategic and financial benefits of the combination."

     Yearley added, "Phelps Dodge remains interested in acquiring Asarco to
realize the additional benefits of a three-way combination -- if we can do so on
terms that make economic sense for our shareholders. Our 40% premium exchange
offer remains on the table, and we hope to have further discussions with
Asarco."

     Milton H. Ward, Chairman, President and Chief Executive Officer of Cyprus
Amax, said, "This premium transaction provides significant current value to
Cyprus Amax shareholders as well as the opportunity to participate in what we
believe is the substantial upside potential of the combination. We are confident
that Cyprus Amax customers will be well served, and our shareholders and
employees will benefit from being part of a world-class global copper producer."

     Phelps Dodge expects to achieve annual cash cost savings of at least $100
million from the combination, to be fully phased in by the end of 2001, through
reductions in SG&A expenses, operating improvements and efficiencies in
exploration.

     J. Steven Whisler, President and Chief Operating Officer of Phelps Dodge,
said, "We have done a great deal of advance planning and, working closely with
representatives of Cyprus Amax, our integration teams will move swiftly to
realize the full benefits of this combination."

     Morgan Stanley Dean Witter served as financial advisor to Phelps Dodge and
Merrill Lynch served as financial advisor to Cyprus Amax. Shearman & Sterling
and Debevoise & Plimpton served as legal advisors to Phelps Dodge and Wachtell,
Lipton, Rosen & Katz served as legal advisor to Cyprus Amax.

     Cyprus Amax Minerals Company, headquartered in Englewood, Colorado, is a
leading producer of copper, the world's largest producer of molybdenum, and
holds a 30% interest in Kinross Gold. Cyprus Amax is exploring for minerals
worldwide. Additional information can be found at www.cyprusamax.com.

     Phelps Dodge Corporation is among the world's largest producers of copper.
The company also is one of the world's largest producers of carbon black, one of
the world's largest manufacturers of magnet wire, and has operations and
investments in mines and wire and cable manufacturing facilities around the
world. Phelps Dodge has operations in 28 countries. Additional information can
be found at www.phelpsdodge.com.

STATEMENTS IN THIS PRESS RELEASE INCLUDE "FORWARD-LOOKING STATEMENTS" THAT
EXPRESS EXPECTATIONS OF FUTURE EVENTS OR RESULTS. ALL STATEMENTS BASED ON FUTURE
EXPECTATIONS RATHER THAN ON HISTORICAL FACTS ARE FORWARD-LOOKING STATEMENTS THAT
INVOLVE A NUMBER OF RISKS AND UNCERTAINTIES, AND THE COMPANIES CANNOT GIVE
ASSURANCE THAT SUCH STATEMENTS WILL PROVE TO BE CORRECT. PLEASE REFER TO THE
MANAGEMENT'S DISCUSSION AND ANALYSIS SECTIONS OF COMPANY REPORTS ON FORM 10-K
FOR THE YEAR ENDED DECEMBER 31, 1998.

<PAGE>   1
                          AGREEMENT AND PLAN OF MERGER

                                      among

                            PHELPS DODGE CORPORATION

                                 CAV CORPORATION

                                       and

                          CYPRUS AMAX MINERALS COMPANY

                         Dated as of September 30, 1999
<PAGE>   2
                                TABLE OF CONTENTS

                                                                            Page
                                                                            ----


                                    ARTICLE I

                                    THE OFFER

Section 1.1  The Cyprus Offer..................................................2
Section 1.2  Cyprus Elections..................................................2
Section 1.3  Cyprus Action.....................................................4
Section 1.4  Parent Action.....................................................4
Section 1.5  Expiration or Termination of Offer................................5


                                   ARTICLE II

                           THE CYPRUS MERGER; CLOSING

Section 2.1  The Cyprus Merger.................................................5
Section 2.2  The Closing.......................................................6
Section 2.3  Effective Time....................................................6
Section 2.4  Effects of the Cyprus Merger......................................6
Section 2.5  Directors and Officers............................................6


                                   ARTICLE III

                   EFFECT OF THE CYPRUS MERGER ON THE STOCK OF
                        CYPRUS; EXCHANGE OF CERTIFICATES

Section 3.1  Effect on Cyprus Stock and SubC Stock.............................7
Section 3.2  Exchange of Certificates..........................................8
Section 3.3  Dissenting Shares................................................12


                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES

Section 4.1  Organization, Qualification, Etc.................................13


                                        i
<PAGE>   3
Section 4.2   Capital Stock...................................................14
Section 4.3   Corporate Authority Relative to This Agreement..................15
Section 4.4   Non-Contravention; Consents and Approvals.......................16
Section 4.5   Reports and Financial Statements................................17
Section 4.6   Environmental Matters...........................................18
Section 4.7   Employee Benefit Plans; ERISA...................................20
Section 4.8   Information Statement; Phelps Dodge Proxy Statement;
              Registration Statement; Other Information.......................23
Section 4.9   Cyprus Rights Plan..............................................23
Section 4.10  Tax Matters.....................................................23
Section 4.11  Opinion of Financial Advisors...................................25
Section 4.12  Required Vote...................................................25
Section 4.13  Absence of Certain Changes......................................25
Section 4.14  No Undisclosed Material Liabilities.............................27
Section 4.15  Labor Relations.................................................27
Section 4.16  No Prior Activities.............................................27


                                    ARTICLE V

                            COVENANTS AND AGREEMENTS

Section 5.1   Conduct of Business Pending the Effective Time..................27
Section 5.2   Investigation...................................................30
Section 5.3   Stockholder Approvals and Other Cooperation.....................31
Section 5.4   Affiliate Agreements............................................33
Section 5.5   Cyprus Employee Stock Options, Incentive and Benefit Plans......33
Section 5.6   Filings; Other Action...........................................35
Section 5.7   Further Assurances..............................................37
Section 5.8   Takeover Statute................................................37
Section 5.9   No Solicitation by Cyprus.......................................37
Section 5.10  Public Announcements............................................39
Section 5.11  Indemnification and Insurance...................................39
Section 5.12  Accountants' "Comfort" Letters..................................39
Section 5.13  Additional Reports..............................................39
Section 5.14  Disclosure Schedule Supplements.................................40
Section 5.15  Certain Litigation..............................................40
Section 5.16  Shareholder Litigation..........................................40
Section 5.17  Section 16(b)...................................................40
Section 5.18  Change of Control Agreements....................................41


                                       ii
<PAGE>   4
                                   ARTICLE VI

                         CONDITIONS TO THE CYPRUS MERGER

Section 6.1  Conditions to Each Party's Obligation to Effect
the Cyprus Merger.............................................................41


                                   ARTICLE VII

                        TERMINATION, WAIVER AND AMENDMENT

Section 7.1  Termination......................................................42
Section 7.2  Termination by Parent............................................42
Section 7.3  Termination by Cyprus............................................43
Section 7.4  Effect of Termination............................................43
Section 7.5  Termination Fee..................................................43
Section 7.6  Amendment or Supplement..........................................44
Section 7.7  Extension of Time, Waiver, Etc...................................44


                                  ARTICLE VIII

                                  MISCELLANEOUS

Section 8.1  No Survival of Representations and Warranties....................45
Section 8.2  Expenses.........................................................45
Section 8.3  Counterparts; Effectiveness......................................45
Section 8.4  Governing Law....................................................45
Section 8.5  Notices..........................................................46
Section 8.6  Assignment; Binding Effect.......................................47
Section 8.7  Severability.....................................................47
Section 8.8  Enforcement of Agreement.........................................47
Section 8.9  Entire Agreement; No Third-Party Beneficiaries...................47
Section 8.10  Headings........................................................47
Section 8.11  Definitions.....................................................47
Section 8.12  Finders or Brokers..............................................48
Section 8.13  Cyprus Actions Following the Offer..............................48


                                       iii
<PAGE>   5
                                LIST OF EXHIBITS

Exhibit A      -      Form of Cyprus Affiliate Letter


                                 LIST OF ANNEXES

Annex A        -      Conditions to the Cyprus Offer


                                       iv
<PAGE>   6
                             INDEX OF DEFINED TERMS


Defined Term                                                             Section
- ------------                                                             -------

accumulated funding deficiency...........................................4.7(d)
affiliates.................................................................8.11
Aggregate Cyprus Merger Cash Consideration...............................3.1(b)
Aggregate Cyprus Merger Stock Consideration..............................3.1(b)
Agreement..............................................................Preamble
Antitrust Laws...........................................................5.6(b)
ASARCO...................................................................7.5(b)
ASARCO Merger Agreement..................................................7.5(b)
Certificates.............................................................3.1(b)
Closing.....................................................................2.2
Closing Date................................................................2.2
Code...................................................................Recitals
Combination............................................................Recitals
Common Shares Trust...................................................2(e)(iii)
Confidentiality Agreement................................................5.2(a)
Continuing Director.........................................................7.6
control....................................................................8.11
Current Representing Party Group........................................4.10(a)
Cyprus.................................................................Preamble
Cyprus Acquisition Agreement.............................................5.9(b)
Cyprus Amax Minerals Company.............................................2.4(b)
Cyprus Award.............................................................5.5(b)
Cyprus Board.............................................................1.3(a)
Cyprus Cash Consideration..............................................Recitals
Cyprus Cash Election Shares..............................................1.2(a)
Cyprus Cash Proration Factor.............................................1.2(b)
Cyprus Common Stock......................................................2.1(b)
Cyprus Disclosure Schedule...........................................Article IV
Cyprus Employees.........................................................5.5(e)
Cyprus Excess Shares.................................................3.2(e)(ii)
Cyprus Indemnified Parties..............................................5.11(a)
Cyprus Maximum Cash Consideration........................................1.2(b)
Cyprus Maximum Stock Consideration.......................................1.2(c)
Cyprus Merger............................................................2.1(a)
Cyprus Merger Cash Amount................................................3.1(b)
Cyprus Merger Stock Amount...............................................3.1(b)
Cyprus Non-Electing Proration Factor.....................................1.2(d)
Cyprus Non-Electing Shares...............................................1.2(a)


                                        v
<PAGE>   7
Cyprus Notice............................................................5.9(a)
Cyprus Offer...........................................................Recitals
Cyprus Option Plans......................................................5.5(a)
Cyprus Policy...........................................................5.11(b)
Cyprus Preferred Stock...................................................3.1(c)
Cyprus SAR...............................................................5.5(a)
Cyprus Shareholder Approval.............................................4.12(b)
Cyprus Shareholder Meeting..........................................5.3(c)(iii)
Cyprus Stock Consideration.............................................Recitals
Cyprus Stock Election Shares.............................................1.2(a)
Cyprus Stock Options.....................................................5.5(a)
Cyprus Stock Proration Factor............................................1.2(c)
Cyprus Takeover Proposal.................................................5.9(a)
Cyprus Termination Fee......................................................7.5
DGCL.....................................................................2.1(a)
Dissenting Cyprus Shares.................................................3.3(a)
Effective Time..............................................................2.3
Employee Benefit Plan.................................................4.7(g)(i)
Encumbrance..............................................................4.1(c)
Environmental Claim...................................................4.6(d)(i)
Environmental Law....................................................4.6(d)(ii)
Environmental Permits....................................................4.6(a)
ERISA...............................................................4.7(g)(iii)
ERISA Affiliate......................................................4.7(g)(iv)
Exchange Act.............................................................1.3(b)
Exchange Agent...........................................................3.2(a)
Exchange Fund............................................................3.2(a)
Foreign Plan.........................................................4.7(g)(ii)
GAAP...................................................................Recitals
Governmental Entity......................................................4.4(a)
Hazardous Materials.................................................4.6(d)(iii)
HSR Act..................................................................5.6(b)
Information Statement.......................................................4.8
IRS......................................................................4.7(b)
Law......................................................................4.4(a)
Material Adverse Effect.................................................4.1(a)
Merger Consideration....................................................3.1(b)
Minimum Condition..........................................................1.1
Multiemployer Plan......................................................4.7(a)
NYSE................................................................3.2(e)(ii)
Offer Documents............................................................1.4
Parent................................................................Preamble
Parent Certificates.....................................................3.2(a)


                                       vi
<PAGE>   8
Parent Common Stock....................................................Recitals
Parent Disclosure Schedule...........................................Article IV
Parent Shareholder Approval.............................................4.12(a)
Parent Shareholder Meeting...........................................5.3(c)(ii)
Past Representing Party Group...........................................4.10(a)
person.....................................................................8.11
Phelps Dodge Proxy Statement.........................................5.3(c)(ii)
Plan................................................................4.7(g)(iii)
Registration Statement................................................5.3(a)(i)
Representing Party...................................................Article IV
Representing Party Affiliated Group.....................................4.10(a)
Representing Party Agreements............................................4.4(a)
Representing Party's Disclosure Schedule.............................Article IV
Required Statutory Approvals.............................................4.4(b)
Required Third Party Consents............................................4.4(b)
Schedule 14D-1..............................................................1.4
Schedule 14D-9...........................................................1.3(b)
SEC......................................................................4.5(a)
SEC Reports.................................................................4.5
Securities Act..............................................................4.5
Share Issuance...........................................................4.3(a)
Significant Subsidiaries...................................................8.11
SubC...................................................................Preamble
Subsidiaries...............................................................8.11
Surviving Corporation....................................................2.1(a)
Tax Certificates......................................................5.3(a)(v)
Tax Return.................................................................4.10
Taxes......................................................................4.10
Termination Date............................................................5.1


                                       vii
<PAGE>   9
         THIS AGREEMENT AND PLAN OF MERGER, dated as of September 30, 1999 (this
"Agreement"), among PHELPS DODGE CORPORATION, a New York corporation ("Parent"),
CAV CORPORATION, a Delaware corporation ("SubC"), and CYPRUS AMAX MINERALS
COMPANY, a Delaware corporation ("Cyprus").

         WHEREAS, Parent and Cyprus desire to combine their respective
businesses upon the terms and subject to the conditions in this Agreement (the
"Combination");

         WHEREAS, (i) Parent is a corporation organized and existing under the
laws of the State of New York; and (ii) Cyprus is a corporation organized and
existing under the laws of the State of Delaware;

         WHEREAS, Parent has formed SubC, a wholly owned subsidiary of Parent,
and all the outstanding capital stock of SubC is owned by Parent;

         WHEREAS, the Board of Directors of each of Parent and Cyprus deem it
advisable and in the best interests of their shareholders to effect the
Combination by causing Cyprus to become a subsidiary of Parent pursuant to the
Cyprus Merger as provided for in this Agreement;

         WHEREAS, in furtherance of the Combination, Parent has caused SubC to
commence an exchange offer, which Parent shall cause SubC to amend in accordance
with the terms of this Agreement (as so amended, the "Cyprus Offer"), to acquire
all of the issued and outstanding shares of Cyprus Common Stock (as hereinafter
defined), for either $20.54 per share, net to the seller in cash, without
interest (the "Cyprus Cash Consideration") or 0.3500 of a share of common stock
of Parent, par value $6.25 per share ("Parent Common Stock") (the "Cyprus Stock
Consideration"), subject to the election and proration provisions of this
Agreement and to the terms and conditions of this Agreement and the Cyprus
Offer;

         WHEREAS, the parties desire to make certain representations,
warranties, covenants and agreements in connection with the Combination and also
to prescribe various conditions to the Combination;

         WHEREAS, for U.S. federal income tax purposes, it is intended that the
Cyprus Merger will qualify as a transaction described in Section 368(a) of the
Internal Revenue Code of 1986, as amended (the "Code"); and

         WHEREAS, for financial accounting purposes, it is intended that the
transactions contemplated by this Agreement will be accounted for as a purchase
transaction in accordance with United States generally accepted accounting
principles ("GAAP");

         NOW, THEREFORE, in consideration of the representations, warranties,
covenants and agreements contained in this Agreement, and fully intending to be
legally bound hereby, the parties agree as follows:
<PAGE>   10
                                    ARTICLE I

                                    THE OFFER

         Section 1.1 The Cyprus Offer. The obligation of Parent to accept for
payment and pay for Cyprus Common Stock tendered pursuant to the Cyprus Offer
shall be subject to the condition (the "Minimum Condition") that the Cyprus
Common Stock, when added to the Cyprus Common Stock already owned by Parent,
shall constitute at least a majority of the then outstanding Cyprus Common Stock
on a fully diluted basis (including, without limitation, all Cyprus Common Stock
issuable upon the conversion of any convertible securities or upon the exercise
of any options, warrants or rights) having been validly tendered and not
withdrawn prior to the expiration of the Cyprus Offer and also shall be subject
to the satisfaction of the other conditions set forth in Annex A hereto. Parent
expressly reserves the right to waive any such condition, to increase the price
per share of Cyprus Common Stock payable in the Cyprus Offer, and to make any
other changes in the terms and conditions of the Cyprus Offer; provided,
however, that, without the prior written consent of Cyprus, no change may be
made to the Minimum Condition or which decreases the price per share of Cyprus
Common Stock payable in the Cyprus Offer, which changes the form of
consideration payable in the Cyprus Offer, which reduces the maximum number of
shares of Cyprus Common Stock to be acquired in the Cyprus Offer, which imposes
conditions to the Cyprus Offer in addition to those set forth in Annex A hereto,
or which amends any other term of the Cyprus Offer in any manner adverse to the
holders of the Cyprus Common Stock. Without the prior written consent of Cyprus,
Parent will not waive the Minimum Condition if, as a result, SubC would acquire
less than a majority of the Cyprus Common Stock outstanding. The Cyprus Cash
Consideration shall, subject to applicable withholding of taxes, be net to the
seller in cash, upon the terms and subject to the conditions of the Cyprus
Offer. Subject to the terms and conditions of the Cyprus Offer, Parent shall
accept for payment and purchase, as soon as permitted under the terms of the
Cyprus Offer, and shall pay the Cyprus Cash Consideration and issue Parent
Common Stock in payment of the Cyprus Stock Consideration, as promptly as
practicable after expiration of the Cyprus Offer for, all shares of Cyprus
Common Stock validly tendered and not withdrawn.

         Section 1.2 Cyprus Elections.

         (a) Subject to Sections 1.2(b), (c) and (d) below, each holder of
Cyprus Common Stock shall be entitled, with respect to each share of Cyprus
Common Stock held by such holder, to elect to receive either the Cyprus Cash
Consideration or the Cyprus Stock Consideration. Cyprus shares that are validly
tendered and not withdrawn and (i) covered by elections to receive the Cyprus
Cash Consideration are referred to herein as "Cyprus Cash Election Shares", (ii)
covered by elections to receive the Cyprus Stock Consideration are referred to
herein as "Cyprus Stock Election Shares" and (iii) not covered by a valid
election to receive either the Cyprus Cash Consideration or the Cyprus Stock
Consideration are referred to herein as "Cyprus Non-Electing Shares".


                                        2
<PAGE>   11
         (b) Excess of Cash Elections. If the aggregate Cyprus Cash
Consideration elected in respect of all Cyprus Cash Election Shares exceeds
$7.61176875 multiplied by the total number of Cyprus shares outstanding
immediately prior to closing of the Offer (the "Cyprus Maximum Cash
Consideration"), the following will occur:

         1. Each Cyprus Cash Election Share will be exchanged in the Offer for
    (i) $20.54 multiplied by a fraction (the "Cyprus Cash Proration Factor"),
    the numerator of which is the Cyprus Maximum Cash Consideration and the
    denominator of which is the number of Cyprus Cash Election Shares multiplied
    by $20.54, and (ii) a number of shares of Parent Common Stock equal to
    0.3500 multiplied by 1 minus the Cyprus Cash Proration Factor.

         2. Each Cyprus Stock Election Share and each Cyprus Non-Electing Share
    will be exchanged for 0.3500 of a share of Parent Common Stock.

         (c) Excess of Stock Elections. If the aggregate Cyprus Stock
Consideration elected in respect of all Cyprus Stock Election Shares exceeds
0.2203 multiplied by the total number of Cyprus shares outstanding immediately
prior to closing of the Offer (the "Cyprus Maximum Stock Consideration"), the
following will occur:

         1. Each Cyprus Stock Election Share will be exchanged in the Offer for
    (i) a number of shares of Parent Common Stock equal to 0.3500 multiplied by
    a fraction (the "Cyprus Stock Proration Factor"), the numerator of which is
    the Cyprus Maximum Stock Consideration and the denominator of which is the
    number of Cyprus Stock Election Shares multiplied by 0.3500, and (ii) cash
    in an amount equal to $20.54 multiplied by 1 minus the Cyprus Stock
    Proration Factor.

         2. Each Cyprus Cash Election Share and each Cyprus Non-Electing Share
    will be exchanged for $20.54, without interest.

         (d) No Excess of Cash or Stock Elections. In the event that neither
Section 1.2(b) or 1.2(c) above is applicable, the following will occur:

         1. Each Cyprus Cash Election Share will be exchanged for $20.54 in cash
    without interest.

         2. Each Cyprus Stock Election Share will be exchanged for 0.3500 of a
    share of Parent Common Stock.

         3. Each Cyprus Non-Electing Share will be exchanged for (i) an amount
    in cash without interest equal to $20.54 multiplied by a fraction (the
    "Cyprus Non-Electing Proration Factor"), the numerator of which is the
    difference between the Cyprus Cash Number (as hereinafter defined) less the
    number of Cyprus Cash Election Shares and the


                                        3
<PAGE>   12
    denominator of which is the number of Cyprus Non-Electing Shares; and (ii) a
    number of shares of Parent Common Stock equal to 0.3500 multiplied by 1
    minus the Cyprus Non-Electing Proration Factor. For purposes of this
    Section 1.2(d), the Cyprus Cash Number is determined by dividing the Cyprus
    Maximum Cash Consideration by $20.54.

         Section 1.3 Cyprus Action.

         (a) Cyprus hereby approves of and consents to the Cyprus Offer and
represents that (i) the Cyprus Board of Directors (the "Cyprus Board"), at a
meeting duly called and held on September 30, 1999, has unanimously (A)
determined that this Agreement and the transactions contemplated hereby,
including each of the Cyprus Offer and the Cyprus Merger, are fair to and in the
best interests of the holders of Cyprus Common Stock, (B) approved and adopted
this Agreement and the transactions contemplated hereby and (C) recommended that
the stockholders of Cyprus accept the Cyprus Offer and approve and adopt this
Agreement and the transactions contemplated hereby, and (ii) Merrill Lynch & Co.
has delivered to the Cyprus Board an written opinion that the consideration to
be received by the holders of Cyprus Common Stock pursuant to each of the Cyprus
Offer and the Cyprus Merger is fair to the holders of Cyprus Common Stock from a
financial point of view. Cyprus hereby consents to the inclusion in the Offer
Documents of the recommendation of the Cyprus Board described in the immediately
preceding sentence. Cyprus has been advised by each of its directors and
executive officers that they intend either to tender all Cyprus Common Stock
beneficially owned by them to Parent pursuant to the Cyprus Offer or to vote
such Cyprus Common Stock in favor of the approval and adoption by the
stockholders of Cyprus of this Agreement and the transactions contemplated
hereby.

         (b) As soon as reasonably practicable after the date hereof, Cyprus
shall file with the SEC an amendment to its Solicitation/Recommendation
Statement on Schedule 14D-9 (together with all amendments and supplements
thereto, the "Schedule 14D-9") containing, subject to the fiduciary duties of
the Cyprus Board under applicable law as advised in writing by independent
counsel, the recommendation of the Cyprus Board described in Section 1.3(a) and
shall disseminate the Schedule 14D-9 to the extent required by Rule 14d-9
promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), and any other applicable federal securities laws. Cyprus and Parent agree
to correct promptly any information provided by either of them for use in the
Schedule 14D-9 which shall have become false or misleading, and Cyprus further
agrees to take all steps necessary to cause the Schedule 14D-9 as so corrected
to be filed with the SEC and disseminated to holders of Cyprus Common Stock, in
each case as and to the extent required by applicable federal securities laws.

         Section 1.4 Parent Action. As soon as reasonably practicable after the
date hereof, Parent shall file with the SEC an amendment to its Tender Offer
Statement on Schedule 14D-1 (together with all amendments and supplements
thereto, the "Schedule 14D-1") with respect to the Cyprus Offer. The Schedule
14D-1 shall contain the terms and conditions of the Cyprus Offer in accordance
with the terms of this Agreement and shall contain or incorporate by


                                        4
<PAGE>   13
reference an offer to purchase and the related letter of transmittal (the
Schedule 14D-1, such offer to purchase and related letter of transmittal,
together with all supplements and amendments thereto being referred to herein
collectively as the "Offer Documents"). As soon as reasonably practicable after
the date hereof, Parent shall disseminate the Schedule 14D-1 to the extent
required by Rule 14d-3 promulgated under the Exchange Act and any other
applicable federal securities laws. Parent and Cyprus agree to correct promptly
any information provided by either of them for use in the Schedule 14D-1 which
shall have become false or misleading, and Parent further agrees to take all
steps necessary to cause the Schedule 14D-1 as so corrected to be filed with the
SEC and disseminated to holders of Cyprus Common Stock, in each case as and to
the extent required by applicable federal securities laws.

         Section 1.5 Expiration or Termination of Offer. Parent and SubC agree
that, without the prior written consent of Cyprus, SubC shall not terminate or
withdraw the Cyprus Offer or extend the expiration date of the Cyprus Offer
unless at the expiration date of the Cyprus Offer the conditions to the Cyprus
Offer described in Annex A hereto shall not have been satisfied or earlier
waived. If, at the expiration date of the Cyprus Offer, the conditions to the
Cyprus Offer described in Annex A hereto shall not have been satisfied or
earlier waived but there is a reasonable possibility that such conditions may be
satisfied prior to March 31, 2000, Parent shall extend the expiration date of
the Cyprus Offer for an additional period or periods of time, each of which
being no longer than five business days, until, the date such conditions are
satisfied or earlier waived and SubC becomes obligated to accept for payment and
pay for shares of Cyprus Common Stock tendered pursuant to the Cyprus Offer;
provided, however, that if the condition to the Cyprus Offer described in clause
(e) of Annex A hereto has not been satisfied at the expiration date and Parent
has given notice of the breach that has caused such condition not to be
satisfied, Parent and SubC shall have no further obligation to extend the
expiration date of the Cyrpus Offer if such breach has not been cured within 30
days of such notice.


                                   ARTICLE II

                           THE CYPRUS MERGER; CLOSING

         Section 2.1 The Cyprus Merger.

         (a) Upon the terms and subject to the conditions set forth in this
Agreement and in accordance with the Delaware General Corporation Law (the
"DGCL"), SubC shall merge with Cyprus (the "Cyprus Merger") at the Effective
Time. SubC shall be the surviving corporation in the Cyprus Merger (the
"Surviving Corporation"). From and after the Effective Time, the identity and
separate existence of Cyprus shall cease.

         (b) In connection with the Cyprus Merger, Parent shall reserve a
sufficient number of shares of Parent Common Stock, prior to the Cyprus Merger,
to permit the issuance of shares of Parent Common Stock (i) to the holders of
common stock, no par value per share, of


                                        5
<PAGE>   14
Cyprus (the "Cyprus Common Stock") as of the Effective Time in accordance with
the terms of this Agreement and (ii) upon the exercise of Cyprus Stock Options
being assumed by Parent in accordance with Section 5.5 hereof.

         Section 2.2 The Closing. The closing of the Cyprus Merger (the
"Closing") will take place at 10:00 a.m. local time on the day following the
last to occur of the Parent Shareholder Meeting and the Cyprus Shareholder
Meeting (the "Closing Date"), but shall in no event be later than the second
business day after satisfaction or waiver of the conditions set forth in Article
VI unless another time or date is agreed to by the parties hereto. The Closing
will be held at the offices of Shearman & Sterling, 599 Lexington Avenue, New
York, NY, unless another place is agreed to by the parties hereto.

         Section 2.3 Effective Time. Subject to the provisions of this
Agreement, as soon as practicable on or after the Closing Date, SubC and Cyprus
shall file with the Secretary of State of the State of Delaware a certificate of
merger duly completed and executed in accordance with the relevant provisions of
the DGCL and shall make all other filings required under the DGCL to effect the
Cyprus Merger. The Cyprus Merger shall become effective at the actual time of
the filing of such certificate of merger or at such other later time as is
reasonably specified in the certificate of merger (the time at which the Cyprus
Merger becomes fully effective being hereinafter referred to as the "Effective
Time").

         Section 2.4 Effects of the Cyprus Merger.

         (a) DGCL. The Cyprus Merger shall have the effects set forth in Section
259 of the DGCL.

         (b) Name of Surviving Corporation. The name of the Surviving
Corporation from and after the Effective Time shall be "Cyprus Amax Minerals
Company" until changed or amended in accordance with applicable Law.

         (c) Charter Documents. At the Effective Time, the Certificate of
Incorporation and the Bylaws of SubC, as in effect immediately prior to the
Effective Time, shall be the Certificate of Incorporation and Bylaws,
respectively, of the Surviving Corporation.

         Section 2.5 Directors and Officers. The directors of SubC at the
Effective Time shall be the directors of the Surviving Corporation until their
respective successors are duly elected and qualified, as the case may be. The
officers of SubC at the Effective Time shall be the officers of the Surviving
Corporation until their respective successors are duly appointed.


                                        6
<PAGE>   15
                                   ARTICLE III

                   EFFECT OF THE CYPRUS MERGER ON THE STOCK OF
                        CYPRUS; EXCHANGE OF CERTIFICATES

         Section 3.1 Effect on Cyprus Stock and SubC Stock. As of the Effective
Time, by virtue of the Cyprus Merger and without any action on the part of SubC,
Cyprus or the holders of any securities of SubC or Cyprus:

         (a) Cancellation of Treasury Stock. Each share of Cyprus Common Stock
    that is owned directly by Parent, Cyprus or any of their respective
    Subsidiaries (but not including any such shares owned by employees or
    employee benefit or pension plans) shall automatically be cancelled and
    retired and shall cease to exist, and no consideration shall be delivered in
    exchange therefor.

         (b) Conversion of Cyprus Common Stock. Subject to Section 3.2(e), each
    issued and outstanding share of Cyprus Common Stock (other than shares to be
    cancelled in accordance with Section 3.1(a)) shall be converted into the
    Cyprus Stock Consideration, the Cyprus Cash Consideration or a combination
    thereof, in each case determined pursuant to this Section 3.1(b) (such
    consideration being referred to herein as the "Merger Consideration"). If
    Section 1.2(b) is applicable to the Cyprus Offer, each outstanding share of
    Cyprus Common Stock will be converted in the Cyprus Merger into the right to
    receive the Cyprus Stock Consideration. If Section 1.2(c) is applicable to
    the Cyprus Offer, each outstanding share of Cyprus Common Stock will be
    converted in the Cyprus Merger into the right to receive the Cyprus Cash
    Consideration. If neither Section 1.2(b) nor 1.2(c) is applicable, each
    outstanding share of Cyprus Common Stock will be converted in the Cyprus
    Merger into (i) an amount of cash equal to the Cyprus Merger Cash Amount (as
    hereinafter defined), without interest, and (ii) a number of shares of
    Parent Common stock equal to the Cyprus Merger Stock Amount (as hereinafter
    defined). The Cyprus Merger Cash Amount and the Cyprus Merger Stock Amount
    will be determined as follows:

              1. The aggregate amount of Cyprus Cash Consideration actually paid
         in the Cyprus Offer will be subtracted from the Total Cyprus Available
         Cash (as hereinafter defined) to determine the amount of cash available
         to be paid in the Cyprus Merger (the "Aggregate Cyprus Merger Cash
         Consideration"). For purposes of this Section, Total Cyprus Available
         Cash equals (i) the number of shares of Cyprus Common Stock exchanged
         in the Cyprus Offer plus the number of shares of Cyprus Common Stock to
         be converted in the Cyprus Merger, multiplied by (ii) $7.61176875.

              2. The Aggregate Cyprus Merger Cash Consideration will be divided
         by the number of shares of Cyprus Common Stock to be converted in the
         Cyprus


                                        7
<PAGE>   16
         Merger, to determine the amount of cash consideration to be paid in
         respect of each such share of Cyprus Common Stock in the Cyprus Merger
         (the "Cyprus Merger Cash Amount").

              3. The aggregate number of shares of Parent Common Stock actually
         issued as Cyprus Stock Consideration in the Cyprus Offer will be
         subtracted from the Total Cyprus Available Stock (as hereinafter
         defined) to determine the number of shares of Parent Common Stock
         available to be paid in the Cyprus Merger (the "Aggregate Cyprus Merger
         Stock Consideration"). For purposes of this Section, Total Cyprus
         Available Stock equals (i) the number of shares of Cyprus Common Stock
         exchanged in the Cyprus Offer plus the number of shares of Cyprus
         Common Stock to be converted in the Cyprus Merger, multiplied by (ii)
         0.2203.

              4. The Aggregate Cyprus Merger Stock Consideration will be divided
         by the number of shares of Cyprus Common Stock to be converted in the
         Cyprus Merger, to determine the number of shares of Parent Common Stock
         to be issued in respect of each such share of Cyprus Common Stock in
         the Cyprus Merger (the "Cyprus Merger Stock Amount").

         As of the Effective Time, all such shares of Cyprus Common Stock shall
         no longer be outstanding and shall automatically be cancelled and
         retired and shall cease to exist, and each holder of a certificate or
         certificates which immediately prior to the Effective Time represented
         outstanding shares of Cyprus Common Stock (the "Certificates") shall
         cease to have any rights with respect thereto, except the right to
         receive (x) if the Merger Consideration includes Parent Common Stock,
         (i) Parent Certificates, (ii) certain dividends and other distributions
         in accordance with Section 3.2(c), and (iii) cash in lieu of fractional
         shares of Parent Common Stock in accordance with Section 3.2(e),
         without interest, and (y) if the Merger Consideration includes cash,
         the appropriate cash amounts.

              (c) Redemption of Cyprus Preferred Stock. Immediately prior to the
         Effective Time, each issued and outstanding share of $4.00 Series A
         Convertible Preferred Stock of Cyprus (the "Cyprus Preferred Stock")
         shall be redeemed by Cyprus. Cyprus shall give the required notice of
         redemption sufficient to allow for such redemption.

              (d) Conversion of Common Stock of SubC. Each issued and
         outstanding share of common stock, par value $.01 per share, of SubC
         shall be converted into one fully paid and nonassessable share of
         common stock of the Surviving Corporation.

         Section 3.2 Exchange of Certificates.

         (a) Exchange Agent. As of the Effective Time, Parent shall enter into
an agreement with such bank or trust company as may be designated by it and
reasonably satisfactory to Cyprus (the "Exchange Agent"), which shall provide
that Parent shall deposit with


                                        8
<PAGE>   17
the Exchange Agent as of the Effective Time, for the benefit of the holders of
shares of Cyprus Common Stock, for exchange in accordance with this Article III,
through the Exchange Agent, cash and certificates ("Parent Certificates")
representing the number of whole shares of Parent Common Stock issuable or
payable pursuant to Section 3.1 in exchange for outstanding shares of Cyprus
Common Stock (such cash and shares of Parent Common Stock, together with any
dividends or distributions with respect to such Parent Common Stock with a
record date after the Effective Time, any Cyprus Excess Shares and any cash
(including cash proceeds from the sale of the Cyprus Excess Shares) payable in
lieu of any fractional shares of Parent Common Stock being hereinafter referred
to as the "Exchange Fund").

         (b) Exchange Procedures. As soon as reasonably practicable after the
Effective Time, the Exchange Agent shall mail to each holder of record of a
Certificate whose shares were converted into the Merger Consideration pursuant
to Section 3.1 (i) a letter of transmittal (which shall specify that delivery
shall be effected, and risk of loss and title to the cash and/or Certificate
shall pass, only upon delivery of the Certificate to the Exchange Agent and
shall be in such form and have such other provisions as Parent may reasonably
specify), and (ii) instructions for use in effecting the surrender of the
Certificate in exchange for the Merger Consideration. Upon surrender of a
Certificate for cancellation to the Exchange Agent, together with such letter of
transmittal, duly executed, and such other documents as may reasonably be
required by the Exchange Agent, the holder of such Certificate shall be entitled
to receive in exchange therefor, cash and/or a Parent Certificate representing
that number of whole shares of Parent Common Stock which such holder has the
right to receive pursuant to the provisions of this Article III, certain
dividends or other distributions in accordance with Section 3.2(c) and cash in
lieu of any fractional share in accordance with Section 3.2(e), and the
Certificate so surrendered shall forthwith be cancelled. In the event of a
transfer of ownership of Cyprus Common Stock not registered in the transfer
records of Cyprus, cash and/or a Parent Certificate representing the proper
number of shares of Parent Common Stock may be issued to a person other than the
person in whose name the Certificate so surrendered is registered if such
Certificate shall be properly endorsed or otherwise be in proper form for
transfer, and the person requesting such issuance shall pay all transfer or
other non-income Taxes required by reason of the issuance of shares of Parent
Common Stock and/or cash to a person other than the registered holder of such
Certificate or establish to the satisfaction of Parent that such Tax has been
paid or is not applicable. Until surrendered as contemplated by this Section
3.2, each Certificate shall be deemed at any time after the Effective Time to
represent only the right to receive upon such surrender of Cyprus Certificates,
cash and/or Parent Certificates representing the number of whole shares of
Parent Common Stock into which the shares of Cyprus Common Stock formerly
represented by such Certificate have been converted, certain dividends or other
distributions in accordance with Section 3.2(c) and cash in lieu of any
fractional share in accordance with Section 3.2(e). No interest will be paid or
will accrue on any cash payable to holders of Certificates pursuant to the
provisions of this Article III.

         (c) Distributions with Respect to Unexchanged Shares. No dividends or
other distributions with respect to Parent Common Stock with a record date after
the Effective Time


                                        9
<PAGE>   18
shall be paid to the holder of any unsurrendered Certificate with respect to the
shares of Parent Common Stock represented thereby, and no cash payment in lieu
of fractional shares shall be paid to any such holder pursuant to Section
3.2(e), and all such dividends, other distributions and cash in lieu of
fractional shares of Parent Common Stock shall be paid by Parent to the Exchange
Agent and shall be included in the Exchange Fund, in each case until the
surrender of such Certificate in accordance with this Article III. Subject to
the effect of applicable escheat or similar Laws, following surrender of any
such Certificate there shall be paid to the holder of the Parent Certificate
representing whole shares of Parent Common Stock issued in exchange therefor,
without interest, (i) at the time of such surrender, the amount of dividends or
other distributions with a record date after the Effective Time theretofore paid
with respect to such whole shares of Parent Common Stock and the amount of any
cash payable in lieu of a fractional share of Parent Common Stock to which such
holder is entitled pursuant to Section 3.2(e), and (ii) at the appropriate
payment date, the amount of dividends or other distributions with a record date
after the Effective Time but prior to such surrender and with a payment date
subsequent to such surrender payable with respect to such whole shares of Parent
Common Stock.

         (d) No Further Ownership Rights in Cyprus Common Stock. All cash and/or
shares of Parent Common Stock issued upon the surrender for exchange of
Certificates in accordance with the terms of this Article III (including any
cash paid pursuant to this Article III) shall be deemed to have been issued (and
paid) in full satisfaction of all rights pertaining to the shares of Cyprus
Common Stock theretofore represented by such Certificates, subject, however, to
the Surviving Corporation's obligation to pay any dividends or make any other
distributions with a record date prior to the Effective Time which may have been
authorized or made by Cyprus on such shares of Cyprus Common Stock which remain
unpaid at the Effective Time, and there shall be no further registration of
transfers on the stock transfer books of the Surviving Corporation of the shares
of Cyprus Common Stock which were outstanding immediately prior to the Effective
Time. If, after the Effective Time, Certificates are presented to the Surviving
Corporation or the Exchange Agent for any reason, they shall be cancelled and
exchanged as provided in this Article III, except as otherwise provided by Law.

         (e) No Fractional Shares.

         (i) No Parent Certificates or scrip representing fractional shares of
Parent Common Stock shall be issued upon the surrender for exchange of
Certificates, no dividend or distribution of Parent shall relate to such
fractional share interests, and such fractional share interests will not entitle
the owner thereof to vote or to any rights of a shareholder of Parent.

         (ii) As promptly as practicable following the Effective Time, the
Exchange Agent will determine the excess of (A) the number of whole shares of
Parent Common Stock delivered to the Exchange Agent by Parent pursuant to
Section 3.2(a) for exchange pursuant to Section 3.1 for outstanding shares of
Cyprus Common Stock over (B) the aggregate number of whole shares of Parent
Common Stock to be distributed to holders of Cyprus Common Stock pursuant to
Section 3.2(b) (such excess being herein called the "Cyprus Excess Shares").


                                       10
<PAGE>   19
Following the Effective Time, the Exchange Agent will, on behalf of former
shareholders of Cyprus, sell the Cyprus Excess Shares at then-prevailing prices
on the New York Stock Exchange, Inc. (the "NYSE"), all in the manner provided in
Section 3.2(e)(iii).

         (iii) The sale of the Excess Shares by the Exchange Agent will be
executed on the NYSE through one or more member firms of the NYSE and will be
executed in round lots to the extent practicable. The Exchange Agent will use
reasonable efforts to complete the sale of the Excess Shares as promptly
following the Effective Time as, in the Exchange Agent's sole judgment, is
practicable consistent with obtaining the best execution of such sales in light
of prevailing market conditions. Until the net proceeds of such sale or sales
have been distributed to the holders of Cyprus Common Stock, the Exchange Agent
will hold such proceeds in trust for the holders of Cyprus Common Stock (the
"Common Shares Trust"). Parent will pay all commissions, transfer Taxes and
other out-of-pocket transaction costs, including the expenses and compensation
of the Exchange Agent incurred in connection with such sale of the Excess
Shares. The Exchange Agent will determine the portion of the Common Shares Trust
to which each holder of Cyprus Common Stock is entitled, if any, by multiplying
the amount of the aggregate net proceeds comprising the Common Shares Trust by a
fraction, the numerator of which is the amount of the fractional share interest
to which such holder of Cyprus Common Stock is entitled (after taking into
account all shares of Cyprus Common Stock held at the Effective Time by such
holder) and the denominator of which is the aggregate amount of fractional share
interests to which all holders of Cyprus Common Stock are entitled.

         (iv) As soon as practicable after the determination of the amount of
cash, if any, to be paid to holders of Cyprus Common Stock with respect to any
fractional share interests, the Exchange Agent will make available such amounts
to such holders of Cyprus Common Stock subject to and in accordance with the
terms of Section 3.2(c).

         (f) Termination of Exchange Fund. Any portion of the Exchange Fund
which remains undistributed to the holders of the Certificates six months after
the Effective Time shall be delivered to Parent upon demand, and any holders of
the Certificates who have not theretofore complied with this Article III shall
thereafter look only to Parent for payment of their claim for Merger
Consideration, any cash in lieu of fractional shares of Parent Common Stock and
any dividends or distributions with respect to Parent Common Stock.

         (g) No Liability. None of Parent, SubC, Cyprus or the Exchange Agent
shall be liable to any person in respect of any shares of Parent Common Stock
(or dividends or distributions with respect thereto) or cash from the Exchange
Fund in each case delivered to a public official pursuant to any applicable
abandoned property, escheat or similar Law. If any Certificate shall not have
been surrendered prior to seven years after the Effective Time (or immediately
prior to such earlier date on which any Merger Consideration, any cash payable
to the holder of such Certificate pursuant to this Article III or any dividends
or distributions payable to the holder of such Certificate would otherwise
escheat to or become the property of any governmental body or authority) any
such Merger Consideration or cash, dividends or


                                       11
<PAGE>   20
distributions in respect of such Certificate shall, to the extent permitted by
applicable Law, become the property of the related Surviving Corporation, free
and clear of all claims or interest of any person previously entitled thereto.

         (h) Lost Certificates. If any Certificate shall have been lost, stolen
or destroyed, upon the making of an affidavit of that fact by the person
claiming such Certificate to be lost, stolen or destroyed and, if required by
the Surviving Corporation, the posting by such person of a bond in such
reasonable amount as the Surviving Corporation may direct as indemnity against
any claim that may be made against it with respect to such Certificate, the
Exchange Agent will issue in exchange for such lost, stolen or destroyed
Certificate, the Merger Consideration and, if applicable, any cash in lieu of
fractional shares, and unpaid dividends and distributions on shares of Parent
Common Stock as may be deliverable in respect thereof pursuant to this
Agreement.

         Section 3.3 Dissenting Shares.

         (a) Notwithstanding any provision of this Agreement to the contrary,
shares of Cyprus Common Stock that are outstanding immediately prior to the
Effective Time and which are held by persons who shall have properly demanded in
writing appraisal for such shares of Cyprus Common Stock in accordance with
Section 262 of the DGCL (collectively, the "Dissenting Cyprus Shares") shall not
be converted into or represent the right to receive the Merger Consideration as
provided in Section 3.1(b). Such persons shall be entitled to receive payment of
the appraised value of such shares of Cyprus Common Stock held by them in
accordance with the provisions of Section 262 of the DGCL, except that all
Dissenting Cyprus Shares held by persons who shall have failed to perfect or who
effectively shall have withdrawn or lost their right to appraisal of such shares
under Section 262 shall thereupon be deemed to have been converted into, as of
the Effective Time, the Merger Consideration (subject to the proration
procedures set forth in Section 3.1(b)) upon surrender of the Certificate
therefor in the manner provided in Section 3.2.

         (b) Cyprus shall give Parent (i) prompt notice of any demands for
appraisal received by Cyprus, withdrawals of such demands and any other
instruments served pursuant to the DGCL and received by Cyprus, and (ii) the
opportunity to participate in all negotiations and proceedings with respect to
demands for appraisal under the DGCL. Cyprus shall not, except with the prior
written consent of Parent, make any payment with respect to any demands for
appraisal or offer to settle or settle any such demands.


                                       12
<PAGE>   21
                                   ARTICLE IV

                         REPRESENTATIONS AND WARRANTIES

         Except (i) as set forth in the disclosure schedule delivered by Parent
to Cyprus prior to the execution of this Agreement (the "Parent Disclosure
Schedule"), Parent hereby represents and warrants to Cyprus, and (ii) as set
forth in the disclosure schedule delivered by Cyprus to Parent prior to the
execution of this Agreement (the "Cyprus Disclosure Schedule"), Cyprus hereby
represents and warrants to Parent, in each case as set forth in this Article IV,
with the party making such representations and warranties being referred to as
the "Representing Party" and such Representing Party's Disclosure Schedule as
the "Representing Party's Disclosure Schedule." Notwithstanding the foregoing,
any representation or warranty which expressly refers to Parent or Cyprus is
being made solely by Parent or Cyprus, as the case may be.

         Section 4.1 Organization, Qualification, Etc.

         (a) The Representing Party is a corporation duly organized, validly
existing and in good standing (or other equivalent status) under the laws of the
jurisdiction of its incorporation and has the corporate power and authority to
own, operate and lease all of its properties and assets and to carry on its
business as it is now being conducted or presently proposed to be conducted and
is duly qualified to do business and is in good standing (or other equivalent
status) in each jurisdiction in which the ownership, operation or leasing of its
properties or assets or the conduct of its business requires such qualification,
except for jurisdictions in which the failure to be so qualified or in good
standing (or other equivalent status) would not, individually or in the
aggregate, have a Material Adverse Effect on the Representing Party and its
Subsidiaries, taken as a whole. As used in this Agreement, any reference to any
state of facts, event, change or effect having a "Material Adverse Effect" on or
with respect to a Representing Party, means such state of facts, event, change
or effect that has had or would reasonably be expected to have a material
adverse effect on the business, results of operations or financial condition of
the Representing Party and its Subsidiaries, taken as a whole; provided,
however, that any adverse effect that copper prices have had or may have on the
business, results of operations or financial condition of the Representing Party
and its Subsidiaries, taken as a whole, shall not be deemed a Material Adverse
Effect for purposes of this Agreement. The copies of each Representing Party's
Certificate of Incorporation and Bylaws which have been delivered to the other
Representing Party are complete and correct and in full force and effect.

         (b) Each of the Representing Party's Significant Subsidiaries is a
corporation duly organized, validly existing and in good standing (or other
equivalent status) under the laws of its jurisdiction of incorporation or
organization, has the power and authority to own, operate and lease its
properties and to carry on its business as it is now being conducted or
presently proposed to be conducted, and is duly qualified to do business and is
in good standing (or equivalent status) in each jurisdiction in which the
ownership, operation or leasing of its


                                       13
<PAGE>   22
properties or assets or the conduct of its business requires such qualification,
except for jurisdictions in which the failure to be so qualified or in good
standing (or other equivalent status) would not, individually or in the
aggregate, have a Material Adverse Effect on the Representing Party. Each
Representing Party has made available to the other Representing Party complete
and correct copies of the certificate of incorporation, bylaws or other similar
governing documents which are in full force and effect for each of such
Representing Party's Significant Subsidiaries that are not directly or
indirectly wholly owned.

         (c) All the outstanding shares of capital stock of, or other ownership
interests in, the Representing Party's Subsidiaries are validly issued, fully
paid and non-assessable and are owned of record and beneficially by such
Representing Party, directly or indirectly, free and clear of all Encumbrances.
As used in this Agreement, the term "Encumbrance" means any mortgage, pledge,
lien, charge, encumbrance, defect, security interest, claim, option or
restriction of any kind. There are no (i) securities of the Representing Party
or any of its Subsidiaries convertible into or exchangeable or exercisable for
shares of capital stock or other voting securities or ownership interests in any
of the Representing Party's Subsidiaries, (ii) warrants, calls, options or other
rights to acquire from the Representing Party or any of its Subsidiaries, or any
obligations of the Representing Party or any of its Subsidiaries to issue, any
capital stock, voting securities or other ownership interests in, or any
securities convertible into or exchangeable or exercisable for, any capital
stock, voting securities or ownership interests in any of the Representing
Party's Subsidiaries, or (iii) obligations of the Representing Party or any of
its Subsidiaries to repurchase, redeem or otherwise acquire any outstanding
securities of the Representing Party's Subsidiaries or to issue, deliver or
sell, or cause to be issued, delivered or sold, any such securities.

         (d) Except for the Representing Party's Subsidiaries, as set forth in
Section 4.1(d) of the Representing Party's Disclosure Schedule or the
Representing Party's (or any of its Subsidiaries') SEC Reports, and in respect
of minerals exploration or development agreements in the ordinary course of
business, the Representing Party (excluding employee pension or benefit plans)
does not own any securities of, or have any debt or equity investment in, or
loans outstanding to, any corporation, partnership, joint venture, limited
liability company or other entity. The Representing Party is not subject to any
contractual obligation under which it may be required to advance or contribute
capital to any entity, except in respect of minerals exploration or development
agreements in the ordinary course of business.

         Section 4.2 Capital Stock.

         (a) Section 4.2(a) of the Representing Party's Disclosure Schedule sets
forth as of September 28, 1999:

         (i) the number of authorized shares of each class or series of capital
    stock of the Representing Party;


                                       14
<PAGE>   23
         (ii) the number of shares of each class or series of capital stock of
    the Representing Party which are issued and outstanding;

         (iii) the number of shares of each class or series of capital stock
    which are held in the treasury of such Representing Party;

         (iv) the number of shares of each class or series of capital stock of
    the Representing Party which are reserved for issuance, indicating each
    specific reservation; and

         (v) the number of shares of each class or series of capital stock of
    such Representing Party which are subject to employee stock options or other
    rights to purchase or receive capital stock granted under such Representing
    Party's stock option or other stock based employee or non-employee director
    benefit plans, indicating the name of the plan, the date of grant, the
    number of shares and the exercise price thereof.

         (b) All of the issued and outstanding shares of capital stock of the
Representing Party have been validly issued and are fully paid and
nonassessable. Except as set forth in Section 4.2(a) of the Representing Party's
Disclosure Schedule, there are no authorized, issued, reserved for issuance or
outstanding (i) shares of capital stock or voting securities of the Representing
Party, (ii) securities convertible into or exchangeable for shares of capital
stock or voting securities of the Representing Party, (iii) warrants, calls,
options or other rights to acquire from the Representing Party or any of its
Subsidiaries, or any obligation of the Representing Party or any of its
Subsidiaries to issue, any shares of capital stock or voting securities or
securities convertible into or exchangeable or exercisable for capital stock or
voting securities of the Representing Party, and (iv) there are no outstanding
obligations of the Representing Party to repurchase, redeem or otherwise acquire
any such securities or to issue, deliver or sell, or cause to be issued,
delivered or sold, any such securities.

         Section 4.3 Corporate Authority Relative to This Agreement.

         (a) Parent has the corporate power and authority to enter into this
Agreement and to carry out its obligations hereunder. The execution, delivery
and performance of this Agreement and the consummation of the transactions
contemplated hereby have been duly and validly authorized by the Board of
Directors of Parent, and, except for the approval of the issuance of the Parent
Common Stock in the Cyprus Merger (the "Share Issuance") by its shareholders, no
other corporate proceedings on the part of Parent are necessary to authorize the
consummation of the transactions contemplated hereby. The Board of Directors of
Parent has determined that the transactions contemplated by this Agreement are
in the best interest of Parent and its shareholders and recommends to such
shareholders that they approve the Share Issuance. This Agreement has been duly
and validly executed and delivered by Parent and, assuming this Agreement
constitutes a valid and binding agreement of the other parties hereto, this
Agreement constitutes a valid and binding agreement of Parent, enforceable
against Parent in accordance


                                       15
<PAGE>   24
with its terms (except insofar as enforceability may be limited by applicable
bankruptcy, insolvency, reorganization, moratorium or similar laws affecting
creditors' rights generally, or by principles governing the availability of
equitable remedies).

         (b) Parent has the corporate power and authority to enter into this
Agreement and to carry out its obligations hereunder. The execution, delivery
and performance of this Agreement and the consummation of the transactions
contemplated hereby have been duly and validly authorized by the Board of
Directors of Parent, and, except for the Share Issuance by its shareholders, no
other corporate proceedings on the part of Parent are necessary to authorize the
consummation of the transactions contemplated hereby. The Board of Directors of
Parent has determined that the transactions contemplated by this Agreement are
in the best interest of Parent and its shareholders and recommends to such
shareholders that they approve the Share Issuance. This Agreement has been duly
and validly executed and delivered by Parent and, assuming this Agreement
constitutes a valid and binding agreement of the other parties hereto, this
Agreement constitutes a valid and binding agreement of Parent, enforceable
against Parent in accordance with its terms (except insofar as enforceability
may be limited by applicable bankruptcy, insolvency, reorganization, moratorium
or similar laws affecting creditors' rights generally, or by principles
governing the availability of equitable remedies).

         (c) Cyprus has the corporate power and authority to enter into this
Agreement and to carry out its obligations hereunder. The execution, delivery
and performance of this Agreement and the consummation of the transactions
contemplated hereby have been duly and validly authorized by the Cyprus Board
and, except for the approval of this Agreement by its shareholders, no other
corporate proceedings on the part of Cyprus are necessary to authorize the
consummation of the transactions contemplated hereby. The Cyprus Board has taken
all appropriate action so that neither Parent nor SubC will be an "interested
stockholder" within, the meaning of (i) Section 203 of the DGCL or (ii) the
Certificate of Incorporation of Cyprus by virtue of Parent and SubC entering
into this Agreement and consummating the transactions contemplated hereby. The
Cyprus Board has determined that the transactions contemplated by this Agreement
are in the best interest of Cyprus and its shareholders and to recommend to such
shareholders that they approve this Agreement. This Agreement has been duly and
validly executed and delivered by Cyprus and, assuming this Agreement
constitutes a valid and binding agreement of the other parties hereto, this
Agreement constitutes a valid and binding agreement of Cyprus, enforceable
against Cyprus in accordance with its terms (except insofar as enforceability
may be limited by applicable bankruptcy, insolvency, reorganization, moratorium
or similar laws affecting creditors' rights generally or by principles governing
the availability of equitable remedies).

         Section 4.4 Non-Contravention; Consents and Approvals.

         (a) None of the execution, delivery or performance of this Agreement by
the Representing Party or the consummation by such Representing Party of the
transactions contemplated hereby will (i) violate the certificate of
incorporation or the bylaws or other similar


                                       16
<PAGE>   25
governing documents of the Representing Party or any of its Subsidiaries, (ii)
except for the Required Third Party Consents, result in the violation or breach
of or constitute (with or without due notice or lapse of time or both) a default
(or give rise to any right of termination, cancellation, vesting, payment,
exercise, acceleration, suspension or revocation) under any of the provisions of
any note, bond, mortgage, deed of trust, security interest, indenture, license,
contract, agreement, plan or other instrument or obligation to which the
Representing Party or any of its Subsidiaries is a party or by which any of them
or any of their properties or assets may be bound (the "Representing Party
Agreements"), (iii) except for the Required Statutory Approvals, violate any
order, writ, injunction, decree, judgment, permit, license, statute, law,
ordinance, policy, rule or regulation ("Law") of any court, tribunal or
administrative, governmental or regulatory body, agency, commission, division,
department, public body or other authority, whether federal, state, local or
foreign (individually, a "Governmental Entity") applicable to the Representing
Party or any of its Subsidiaries or any of their respective property or assets,
or (iv) result in the creation or imposition of any Encumbrance on any asset of
the Representing Party or any of its Subsidiaries, except in the case of clauses
(ii), (iii) and (iv) for violations, breaches, defaults, terminations,
cancellations, accelerations or creations which would not in the aggregate have
a Material Adverse Effect on the Representing Party and its Subsidiaries, taken
as a whole, or prevent or delay the consummation of the transactions
contemplated hereby.

         (b) Section 4.4(b)(i) of the Representing Party's Disclosure Schedule
sets forth a list of all third party consents and approvals required to be
obtained under the Representing Party Agreements prior to the consummation of
the transactions contemplated by this Agreement the failure of which to obtain
would have, individually or in the aggregate, a Material Adverse Effect on the
Representing Party and its Subsidiaries, taken as a whole (the "Required Third
Party Consents"). Section 4.4(b)(ii) of the Representing Party's Disclosure
Schedule sets forth a list of all notices to, filings and registrations with,
and permits, authorizations, consents and approvals of, Governmental Entities
required to be made or obtained from Governmental Entities prior to the
consummation of the transactions contemplated by this Agreement the failure of
which to obtain would have, individually or in the aggregate, a Material Adverse
Effect on the Representing Party and its Subsidiaries, taken as a whole (the
"Required Statutory Approvals").

         Section 4.5 Reports and Financial Statements. The Representing Party
has previously furnished or made available to the other Representing Party
complete and correct copies of:

         (a) such Representing Party's (and any of its Subsidiaries') Annual
    Reports on Form 10-K filed with the Securities and Exchange Commission (the
    "SEC") for each of the years ended December 31, 1996 through 1998;

         (b) such Representing Party's (and any of its Subsidiaries') Quarterly
    Reports on Form 10-Q filed with the SEC for the each of the fiscal quarters
    ended following such Representing Party's last fiscal year-end;


                                       17
<PAGE>   26
         (c) each definitive proxy statement filed by such Representing Party or
    any of its Subsidiaries with the SEC since March 1, 1996;

         (d) each final prospectus filed by such Representing Party with the SEC
    since December 31, 1995; and

         (e) all Current Reports on Form 8-K filed by such Representing Party
    with the SEC since January 1, 1998.

         As of their respective dates, such reports, proxy statements and
prospectuses (collectively, with any amendments, supplements and exhibits
thereto, the "SEC Reports") (i) complied as to form in all material respects
with the applicable requirements of the Securities Act of 1933, as amended (the
"Securities Act"), the Exchange Act and the rules and regulations promulgated
thereunder, and (ii) did not contain any untrue statement of a material fact or
omit to state a material fact required to be stated therein or necessary to make
the statements therein, in light of the circumstances under which they were
made, not misleading. Except to the extent that information contained in any SEC
Report of the Representing Party has been revised or superseded by an SEC Report
subsequently filed by the Representing Party, none of the Representing Party's
SEC Reports contains any untrue statement of a material fact or omits to state
any material fact required to be stated therein or necessary in order to make
the statements therein, in light of the circumstances under which they were
made, not misleading. The audited consolidated financial statements and
unaudited consolidated interim financial statements included in the Representing
Party's SEC Reports (including any related notes and schedules) fairly present
the financial position of the Representing Party and its consolidated
Subsidiaries as of the dates thereof and the results of operations and cash
flows for the periods then ended (subject, in the case of unaudited statements,
to normal year-end adjustments), in each case in accordance with past practice
and GAAP consistently applied during the periods involved (except as otherwise
disclosed in the notes thereto). Since January 1, 1998, the Representing Party
has timely filed all reports, registration statements and other filings required
to be filed by it with the SEC under the rules and regulations of the SEC.

         Section 4.6 Environmental Matters.

         (a) Except for Environmental Claims disclosed in or referred to in
Section 4.6(b) of the Disclosure Schedule, as of the date of this Agreement,
each of the Representing Party and its Subsidiaries has obtained all licenses,
permits, authorizations, approvals and consents from Governmental Entities which
are required under any applicable Environmental Law in respect of its business,
properties, assets and operations ("Environmental Permits"), except (i) for such
permits as to which due and proper application is pending, and (ii) for such
failures to have Environmental Permits which, individually or in the aggregate,
are not reasonably expected to have a Material Adverse Effect on the
Representing Party and its Subsidiaries, taken as a whole. Each of such
Environmental Permits is in full force and effect, and each of the Representing
Party and its Subsidiaries is in compliance with the terms and


                                       18
<PAGE>   27
conditions of all such Environmental Permits and with all applicable
Environmental Laws, except for such exceptions as would not, individually or in
the aggregate, have a Material Adverse Effect on the Representing Party and its
Subsidiaries, taken as a whole.

         (b) Except for Environmental Claims disclosed in or referred to in
Section 4.6(b) of the Disclosure Schedule, as of the date of this Agreement,
there is no Environmental Claim filed, pending, or to the best knowledge of the
Representing Party threatened or in process, against the Representing Party or
any of its Subsidiaries or any person whose liability for such Environmental
Claim the Representing Party or any of its Subsidiaries has or may have retained
or assumed either contractually or by operation of Law, that would, individually
or in the aggregate, have a Material Adverse Effect on the Representing Party
and its Subsidiaries, taken as a whole.

         (c) Except as disclosed or referred to in Section 4.6(c) of the
Disclosure Schedule, no Encumbrances have arisen under or pursuant to any
Environmental Law on any property, site or facility owned, operated or leased by
the Representing Party or any of its Subsidiaries, except for such Encumbrances
which would not, individually or in the aggregate, have a Material Adverse
Effect on the Representing Party and its Subsidiaries, taken as a whole, and no
action of any Governmental Entity has been taken or, to the best knowledge of
the Company, is threatened or in process which could subject any of such
properties to such Encumbrances, except for such action which would not,
individually or in the aggregate, have a Material Adverse Effect on the
Representing Party and its Subsidiaries, taken as a whole.

         (d) As used in this Agreement:

         (i) "Environmental Claim" means any claim, action, cause of action,
    order, investigation or notice (written or oral) by any person alleging
    potential or actual liability (including, without limitation, potential or
    actual liability for investigation, evaluation, cleanup, removal actions,
    remedial actions, response actions, natural resources damages, property
    damages, personal injuries or penalties) arising out of, based on or
    resulting from any Environmental Law, including any claim under CERCLA, and
    shall include any request for information under CERCLA or any comparable
    state or local Law.

         (ii) "Environmental Law" means any Law relating to (a) the environment
    or pollution, environmental matters, the protection of the environment, or
    the protection of human health and safety from environmental concerns, (b)
    actual or threatened emissions, discharges, or releases of pollutants,
    contaminants, chemicals or solid, industrial, toxic or hazardous substances,
    wastes or constituents into the environment, and (c) the presence,
    manufacture, processing, distribution, use, treatment, storage, disposal,
    transport or handling of Hazardous Materials.

         (iii) "Hazardous Materials" mean (a) any petroleum or petroleum
    products and radioactive materials, (b) any chemicals, constituents,
    materials, or substances defined or


                                       19
<PAGE>   28
    included in the definition of "hazardous substances," "hazardous wastes,"
    "hazardous materials," "extremely hazardous substances," "toxic substances"
    and related materials, as such materials are defined in any Environmental
    Law, and (c) any other chemical, material or substance, exposure to which is
    prohibited, limited or regulated by any Governmental Entity.

         Section 4.7 Employee Benefit Plans; ERISA.

         (a) Except as set forth in the Representing Party's SEC Reports or as
would not have a Material Adverse Effect on the Representing Party and its
Subsidiaries, taken as a whole, (i) all Employee Benefit Plans (other than any
Employee Benefit Plan that is a "multiemployer plan" within the meaning of
Section 3(37) of ERISA (a "Multiemployer Plan")) of the Representing Party are
in material compliance with all applicable requirements of Law, including ERISA
and the Code, and (ii) neither the Representing Party nor any of its
Subsidiaries nor any ERISA Affiliate has any liabilities or obligations with
respect to any such Employee Benefit Plans, whether accrued, contingent or
otherwise, that are not otherwise reflected on the Representing Party's
financial statements, nor to the best knowledge of the Representing Party, are
any such liabilities or obligations expected to be incurred. Except as described
in the Representing Party's (or any of its Subsidiaries') SEC Reports or as set
forth in Section 4.7(a) of the Representing Party's Disclosure Schedule, the
execution and delivery of, and performance of the transactions contemplated by
this Agreement will not (either alone or upon the occurrence of any additional
or subsequent events) constitute an event under any Employee Benefit Plan of the
Representing Party that will or may result in acceleration, forgiveness of
indebtedness, vesting, distribution, increase in benefits or obligation to fund
benefits with respect to any employee. The only severance agreements or
severance policies applicable to the Representing Party or any of its
Subsidiaries are the agreements and policies specifically described in Section
4.7(a) of the Representing Party's Disclosure Schedule.

         (b) With respect to each of its Plans, the Representing Party has
heretofore made available to the other Representing Party complete and correct
copies of each of the following documents, as applicable: (i) a copy of the Plan
and any amendments thereto; (ii) a copy of the most recent annual report; (iii)
a copy of the most recent actuarial report; (iv) a copy of the most recent
Summary Plan Description and all material modifications; (v) a copy of the trust
or other funding agreement and any amendments thereto; and (vi) the most recent
determination letter received from the Internal Revenue Service (the "IRS") with
respect to each Plan that is intended to be qualified under Section 401 of the
Code and all notices of reportable events received following receipt of such
letter. Each Representing Party will deliver to the other Representing Party a
copy of each Foreign Plan within thirty days following the date hereof.

         (c) Section 4.7(c) of the Representing Party's Disclosure Schedule sets
forth a list of each employee of the Representing Party (or any Subsidiary) who
is a party to any agreement (whether written or oral) with respect to such
person's employment by the Representing Party or a Subsidiary, other than offer
letters which do not have guaranteed periods


                                       20
<PAGE>   29
of employment and statutory employment agreements under foreign Laws, and which
provide for annual compensation in excess of $100,000. The Representing Party
has made available to the other Representing Party a complete and correct copy
of each such written employment agreement, a complete and correct summary of
each such oral agreement.

         (d) No liability under Title IV of ERISA has been incurred by the
Representing Party or any ERISA Affiliate within the past six years that has not
been satisfied in full. To the best knowledge of the Representing Party, no
condition exists that presents a material risk to the Representing Party, any of
its Subsidiaries or any ERISA Affiliate of incurring a liability under such
Title that is reasonably likely to have a Material Adverse Effect on the
Representing Party. The Pension Benefit Guaranty Corporation has not instituted
proceedings to terminate any of the Employee Benefit Plans, and, to the
knowledge of the Representing Party, no condition exists that presents a
material risk that such proceedings will be instituted. Except as would not have
a Material Adverse Effect on the Representing Party, with respect to each of the
Employee Benefit Plans that is subject to Title IV of ERISA, the present value
of accrued benefits under such Employee Benefit Plan, based upon the actuarial
assumptions used for funding purposes in the most recent actuarial report
prepared by such Employee Benefit Plan's actuary with respect to such Employee
Benefit Plan, did not, as of its latest valuation date, exceed the then current
value of the assets of such Employee Benefit Plan allocable to such accrued
benefits, and there have been no changes since such latest valuation date which
would cause the present value of such accrued benefits to exceed the current
value of such assets. None of the Employee Benefit Plans or any trust
established thereunder has incurred any "accumulated funding deficiency" (as
defined in Section 302 of ERISA and Section 412 of the Code), whether or not
waived, as of the last day of the most recent fiscal year of each of the
Employee Benefit Plans ended prior to the date of this Agreement. None of the
Employee Benefit Plans is a Multiemployer Plan. To the knowledge of the
Representing Party each of the Employee Benefit Plans that is intended to be
"qualified" within the meaning of Section 401(a) of the Code is so qualified and
the trusts maintained thereunder are exempt from taxation under Section 501(a)
of the Code. No Employee Benefit Plan provides benefits, including without
limitation death or medical benefits (whether or not insured), with respect to
current or former employees after retirement or other termination of service
(other than coverage mandated by applicable Law or benefits, the full cost of
which is borne by the current or former employee). There are no material pending
or threatened claims by or on behalf of any Employee Benefit Plan, by any
employee or beneficiary covered under any such Employee Benefit Plan, or
otherwise involving any such Employee Benefit Plan (other than routine claims
for benefits). No prohibited transaction has occurred with respect to any
Employee Benefit Plan that would result, directly or indirectly, in the
imposition of an excise Tax or other liability under the Code or ERISA, except
for such a Tax or other liability that would not have a Material Adverse Effect.
Except as would not have a Material Adverse Effect on the Representing Party,
with respect to each Foreign Plan: (i) all amounts required to be reserved on
account of each Foreign Plan have been so reserved in accordance with reasonable
accounting practices prevailing in the country where such Foreign Plan is
established, and (ii) each Foreign Plan required to be registered with a
Governmental Entity has been registered, has been maintained in good standing
with the


                                       21
<PAGE>   30
appropriate Governmental Entities, and has been maintained and operated in
accordance with its terms and applicable Law.

         (e) No director or officer or other employee of such Representing Party
will become entitled to any termination, retirement, severance or similar
payment, benefit or enhanced or accelerated benefit (including any acceleration
of vesting or lapse of restrictions, repurchase rights or obligations with
respect to any employee stock option or other benefit under any stock option
plan or incentive or compensation plan or arrangement) as a result of the
transactions contemplated by this Agreement (either standing alone or in
conjunction with any additional or subsequent events).

         (f) Any amount or other entitlement that could be received (whether in
cash or property or the vesting of property) as a result of any of the
transactions contemplated by this Agreement by any employee, officer or director
of the Representing Party or any of its affiliates who is a "disqualified
individual" (as such term is defined in proposed Treasury Regulation Section
1.280G-1) under any employee benefit plan or other compensation arrangement
currently in effect would not be characterized as an "excess parachute payment"
or a "parachute payment" (as such terms are defined in Section 280G(b)(1) of the
Code).

         (g) As used in this Agreement:

         (i) "Employee Benefit Plan" means any material Plan entered into,
    established, maintained, sponsored, contributed to or required to be
    contributed to by the Representing Party, any of its Subsidiaries or ERISA
    Affiliates for the benefit of the current or former employees or directors
    of the Representing Party or any of its Subsidiaries and existing on the
    date of this Agreement or at any time subsequent thereto and on or prior to
    the Effective Time;

         (ii) "Foreign Plan" shall refer to each material plan, program or
    contract that is subject to or governed by the Laws of any jurisdiction
    other than the United States, and which would have been treated as an
    Employee Benefit Plan had it been a United States plan, program or contract;

         (iii) "Plan" means any employment, bonus, incentive compensation,
    deferred compensation, pension, profit sharing, retirement, stock purchase:
    stock option, stock ownership, stock appreciation rights, phantom stock,
    leave of absence, layoff, vacation, day or dependent care, legal services,
    cafeteria, life, health, medical, accident, disability, worker's
    compensation or other insurance, severance, separation, termination, change
    of control or other benefit plan, agreement, practice policy, program or
    arrangement of any kind, whether written or oral, other than a Foreign Plan,
    including, but not limited to any "employee benefit plan" within the meaning
    of Section 3(3) of the Employee Retirement Income Security Act of 1974, as
    amended, and the rules and regulations thereunder ("ERISA"); and


                                       22
<PAGE>   31
         (iv) "ERISA Affiliate" means, with respect to any Representing Party,
    any entity, trade or business that is a member of the same controlled group
    as such Representing Party (within the meaning of Sections 414(b), (c), (m)
    or (o) of the Code).

         Section 4.8 Information Statement; Phelps Dodge Proxy Statement;
Registration Statement; Other Information. None of the information with respect
to the Representing Party or its Subsidiaries to be included in the Schedule
14D-9, the Schedule 14D-1, the Information Statement, the Phelps Dodge Proxy
Statement or the Registration Statement will, in the case of the Information
Statement, the Schedule 14D-9, the Schedule 14D-1 or any amendments thereof or
supplements thereto, at the time that such document is mailed, in the case of
the Information Statement and the Phelps Dodge Proxy Statement, at the time of
the Parent Shareholder Meeting and the Cyprus Shareholder Meeting, respectively,
or, in the case of the Registration Statement, at the time it becomes effective,
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
therein, in light of the circumstances under which they were made, not
misleading, except that no representation is made by the Representing Party with
respect to information supplied in writing by the other Representing Party or
any of its affiliates specifically for inclusion in the Information Statement.
The Information Statement will comply as to form in all material respects with
the provisions of the Exchange Act and the rules and regulations promulgated
thereunder. The letters to shareholders, notices of meeting, proxy statement and
forms of proxies to be distributed to stockholders in connection with the Cyprus
Merger and any schedules required to be filed with the SEC in connection
therewith are collectively referred to herein as the "Information Statement."

         Section 4.9 Cyprus Rights Plan. Cyprus represents and warrants that the
Cyprus Board has taken all necessary action to render the Rights Agreement
between Cyprus and The Bank of New York, dated as of February 28, 1999,
inapplicable to the transactions contemplated by this Agreement.

         Section 4.10 Tax Matters.

         (a) All federal, state, local and foreign Tax Returns required to be
filed by or on behalf of the Representing Party, each of its Subsidiaries, and
each affiliated, combined, consolidated or unitary group of which the
Representing Party or any of its Subsidiaries (i) is a member (a "Current
Representing Party Group") or (ii) was a member during six years prior to the
date hereof but is not currently a member, but only insofar as any such Tax
Return relates to a taxable period ending on a date within the last six years (a
"Past Representing Party Group," together with Current Representing Party
Groups, a "Representing Party Affiliated Group") have been timely filed, and all
such Tax Returns filed are complete and accurate except to the extent any
failure to file or any inaccuracies in filed Tax Returns would not, individually
or in the aggregate, have a Material Adverse Effect on such Representing Party
(it being understood that the representations made in this Section, to the
extent that they relate to Past Representing Party Groups, are made to the
knowledge of the Representing Party). All Taxes due and owing by the


                                       23
<PAGE>   32
Representing Party, any Subsidiary of the Representing Party or any Representing
Party Affiliated Group have been paid, or adequately reserved for, except to the
extent any failure to pay or reserve would not, individually or in the
aggregate, have a Material Adverse Effect on the Representing Party. There is no
audit examination, deficiency, refund litigation, proposed adjustment or matter
in controversy with respect to any Taxes due and owing by the Representing
Party, any Subsidiary of the Representing Party or any Representing Party
Affiliated Group which would, individually or in the aggregate, have a Material
Adverse Effect on the Representing Party; provided that in no event shall the
existence of a proposed adjustment or matter in controversy with respect to
Taxes be deemed to have or contribute to a Material Adverse Effect for any
purpose under this Agreement to the extent that such proposed adjustment or
matter in controversy has been specifically reserved for or paid as of the date
of this Agreement. All assessments for Taxes due and owing by the Representing
Party, any Subsidiary of the Representing Party or any Representing Party
Affiliated Group with respect to completed and settled examinations or concluded
litigation have been paid. As soon as practicable after the public announcement
of the execution of the Agreement, the Representing Party will provide the other
party with written schedules of (i) the taxable years of the Representing Party
for which the statutes of limitations with respect to federal income Taxes have
not expired, and (ii) with respect to federal income Taxes, those years for
which examinations have been completed, those years for which examinations are
presently being conducted, and those years for which examinations have not yet
been initiated. The Representing Party and each of its Subsidiaries have
complied in all material respects with all rules and regulations relating to the
withholding of Taxes, except to the extent any such failure to comply would not,
individually or in the aggregate, have a Material Adverse Effect on the
Representing Party.

         (b) Neither the Representing Party nor any of its Subsidiaries has (i)
entered into a closing agreement or similar agreement with a taxing authority
relating to Taxes of the Representing Party or any of its Subsidiaries with
respect to a taxable period for which the statute of limitations is still open,
or (ii) with respect to U.S. federal income Taxes, granted any waiver of any
statute of limitations with respect to, or any extension of a period for the
assessment of, any such income Tax, in either case, that is still outstanding.
There are no Liens relating to Taxes upon the assets of the Representing Party
other than Liens relating to Taxes not yet due, except as would not have a
Material Adverse Effect on the Representing Party. Neither the Representing
Party nor any of its Subsidiaries is a party to any agreement relating to the
allocating or sharing of Taxes, other than an agreement with each other.

         (c) Neither the Representing Party nor any of its Subsidiaries knows of
any fact or has taken any action that could reasonably be expected to prevent
the Cyprus Offer together with the Cyprus Merger from constituting a
reorganization under Section 368(a) of the Code.

         For purposes of this Agreement: (i) "Taxes" means any and all federal,
state, local, foreign or other taxes of any kind (together with any and all
interest, penalties, additions to tax and additional amounts imposed with
respect thereto) imposed by any taxing authority,


                                       24
<PAGE>   33
including, without limitation, taxes or other charges on or with respect to
income, franchise, windfall or other profits, gross receipts, property, sales,
use, severance, capital stock, payroll, employment, social security, workers'
compensation, unemployment compensation, or net worth, and taxes or other
charges in the nature of excise, withholding, ad valorem or value added, and
(ii) "Tax Return" means any return, report or similar statement (including the
attached schedules) required to be filed with respect to any Tax, including,
without limitation, any information return, claim for refund, amended return or
declaration of estimated Tax.

         Section 4.11 Opinion of Financial Advisors. The Cyprus Board has
received the opinion of Merrill Lynch & Co., dated the date of this Agreement,
substantially to the effect that, as of such date, the consideration to be
received by the holders of Cyprus Common Stock in the Cyprus Offer and the
Cyprus Merger is fair to the holders of Cyprus Common Stock from a financial
point of view.

         Section 4.12 Required Vote.

         (a) The affirmative vote of the holders of shares of Parent Common
Stock representing a majority of the shares voting at the Parent Shareholders
Meeting provided that at least 50% of the Parent Common Stock entitled to vote
thereon at the Parent Shareholders Meeting (the "Parent Shareholder Approval")
is required to approve the Cyprus Offer, the Cyprus Merger and the Share
Issuance. No other vote of the shareholders of Parent is required by Law, the
Certificate of Incorporation or the Bylaws of Parent or otherwise in order for
Parent to consummate the Cyprus Offer, the Cyprus Merger and the transactions
contemplated hereby.

         (b) The affirmative vote of the holders of shares of Cyprus Common
Stock representing a majority of all shares entitled to vote at the Cyprus
Shareholder Meeting (the "Cyprus Shareholder Approval") is required to approve
this Agreement. No other vote of the shareholders of Cyprus is required by Law,
the Certificate of Incorporation or the Bylaws of Cyprus or otherwise in order
for Cyprus to consummate the Cyprus Merger and the transactions contemplated
hereby.

         Section 4.13 Absence of Certain Changes. Since December 31, 1998, and,
other than with respect to clause (a) below, prior to the date hereof, except as
set forth in the Representing Party's (or any of its Subsidiaries') SEC Reports
filed prior to the date hereof, the Representing Party and its Subsidiaries have
conducted their respective businesses in the ordinary course, consistent with
past practice and there has not been:

         (a) any event, occurrence or development (including the discovery of
    new or additional information concerning an existing environmental
    condition) which, individually or in the aggregate, would have a Material
    Adverse Effect on the Representing Party;


                                       25
<PAGE>   34
         (b) any declaration, setting aside or payment of any dividend or other
    distribution with respect to any shares of capital stock of the Representing
    Party (other than regular quarterly cash dividends payable by the
    Representing Party in respect of shares of its capital stock consistent with
    past practice) or any repurchase, redemption or other acquisition by the
    Representing Party or any of its Subsidiaries of any outstanding shares of
    its capital stock (except (x) as required by the terms of any employee or
    stock option plan or compensation plan or arrangement, (y) in accordance
    with any dividend reinvestment plan as in effect as of the date of this
    Agreement in the ordinary course of operation of such plan consistent with
    past practice, and/or (z) as otherwise permitted by Section 5.1);

         (c) any amendment of any material term of any outstanding security of
    the Representing Party or any of its Subsidiaries;

         (d) any transaction or commitment made, or any contract, agreement or
    settlement entered into, by (or judgment, order or decree affecting) the
    Representing Party or any of its Subsidiaries relating to its assets or
    business (including the acquisition or disposition of any material amount of
    assets) or any relinquishment by the Representing Party or any of its
    Subsidiaries of any contract or other right, in either case, material to the
    Representing Party and its Subsidiaries taken as a whole, other than
    transactions, commitments, contracts, agreements or settlements (including,
    without limitation, settlements of litigation and tax proceedings) in the
    ordinary course of business consistent with past practice and those
    contemplated by this Agreement;

         (e) any change prior to the date hereof in any method of accounting or
    accounting practice by the Representing Party or any of its Subsidiaries,
    except for any such change which is not material or which is required by
    reason of a concurrent change in GAAP;

         (f) any (i) grant of any severance or termination pay to (or amendment
    to any such existing arrangement with) any director, officer or employee of
    the Representing Party or any of its Subsidiaries, (ii) entering into of any
    employment, deferred compensation, supplemental retirement or other similar
    agreement (or any amendment to any such existing agreement) with any
    director, officer or employee of the Representing Party or any of its
    Subsidiaries, (iii) increase in, or accelerated vesting and/or payment of,
    benefits under any existing severance or termination pay policies or
    employment agreements or (iv) increase in or enhancement of any rights or
    features related to compensation, bonus or other benefits payable to
    directors, officers or employees of the Representing Party or any of its
    Subsidiaries, in each case, other than in the ordinary course of business
    consistent with past practice or as permitted by this Agreement; or

         (g) any material Tax election made or changed, any material audit
    settled or any material amended Tax Returns filed.


                                       26
<PAGE>   35
         Section 4.14 No Undisclosed Material Liabilities. There are no
liabilities of the Representing Party or any Subsidiary of the Representing
Party of any kind whatsoever, whether accrued, contingent, absolute, determined
or determinable, other than:

         (a) liabilities which, individually or in the aggregate, would not have
    a Material Adverse Effect on the Representing Party;

         (b) liabilities disclosed in the SEC Reports of the Representing Party;
    and

         (c) liabilities under or arising as a result of this Agreement.

         Section 4.15 Labor Relations. As of the date of this Agreement: (i)
Section 4.15 of the Representing Party's Disclosure Schedule sets forth a
complete list of each collective bargaining agreement to which the Representing
Party or any of its Subsidiaries is a party, (ii) no labor organization or group
of employees of the Representing Party (or any of its Subsidiaries) has made a
pending demand for recognition or certification, and there are no representation
or certification proceedings or petitions seeking a representation proceeding
presently pending or, to the knowledge of the Representing Party, threatened to
be brought or filed, with the National Labor Relations Board or any other labor
relations tribunal or authority, and (iii) there are no organizing activities,
strikes, work stoppages, slowdowns, lockouts, material arbitrations or material
grievances, or other material labor disputes pending or, to the knowledge of the
Representing Party, threatened against or involving the Representing Party or
any of its Subsidiaries.

         Section 4.16 No Prior Activities. SubC was formed for the purpose of
effecting a business combination transaction with Cyprus, has no Subsidiaries
and has not undertaken any business or other activities other than in connection
with pursuing such business combination and entering into this Agreement and
engaging in the transactions contemplated hereby.


                                    ARTICLE V

                            COVENANTS AND AGREEMENTS

         Section 5.1 Conduct of Business Pending the Effective Time. From and
after the date hereof and prior to the Effective Time or the date, if any, on
which this Agreement is earlier terminated pursuant to Section 7.1 (the
"Termination Date"), and except as may be agreed in writing by the other parties
hereto, or as may be provided for or permitted pursuant to this Agreement or as
disclosed on the Cyprus Disclosure Schedule:

         (a) each of the parties shall, and shall cause each of its Subsidiaries
    to, conduct its operations according to their ordinary and usual course of
    business in substantially the same manner as heretofore conducted;


                                       27
<PAGE>   36
         (b) each of the parties shall use its reasonable best efforts, and
    cause each of its Subsidiaries to use its reasonable best efforts, to
    preserve intact its business organizations and goodwill, keep available the
    services of its current officers and other key employees and preserve its
    relationships with those persons having business dealings with it (including
    its relationships with customers, suppliers, employees and business
    partners);

         (c) each of the parties shall confer at such times as any of the other
    parties may reasonably request with one or more representatives of such
    requesting party to report material operational matters and the general
    status of ongoing operations (to the extent such requesting party reasonably
    requires such information);

         (d) each of the parties shall notify the other parties of any emergency
    or other change in the normal course of its or its Subsidiaries' respective
    businesses or in the operation of its or its Subsidiaries, respective
    properties and of any complaints or hearings (or communications indicating
    that the same may be contemplated) of any Governmental Entity if such
    emergency, change, complaint, investigation or hearing would have a Material
    Adverse Effect on such party;

         (e) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, (i) declare, set aside, authorize or pay any
    dividends on or make any distribution with respect to its outstanding shares
    of stock, except in the case of Parent for regular quarterly cash dividends
    on the outstanding shares of Parent Common Stock, in the case of Cyprus for
    regular quarterly cash dividends on the outstanding shares of Cyprus Common
    Stock and Cyprus Preferred Stock; or (ii) split, combine or reclassify any
    of its shares of capital stock;

         (f) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, except (i) in the ordinary course of business
    consistent with past practice, (ii) as otherwise provided in this Agreement
    or (iii) as required by applicable Law, adopt or amend any Employee Benefit
    Plan;

         (g) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, authorize, propose or announce an intention to
    authorize or propose, or enter into an agreement with respect to, any
    merger, consolidation or business combination (other than the Cyprus
    Merger), any acquisition of a material amount of assets or securities, any
    disposition of a material amount of assets or securities (except as set
    forth in Section 5.1(g) of the Cyprus Disclosure Schedule) or any release or
    relinquishment of any material contract rights, in each case not in the
    ordinary course of business;


                                       28
<PAGE>   37
         (h) none of the parties shall, and none of the parties shall permit its
    Subsidiaries to, propose or adopt any amendments to its certificate of
    incorporation or by-laws or other similar governing documents;

         (i) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, issue or authorize the issuance of, or agree to
    issue or sell any shares of their capital stock of any class (whether
    through the issuance or granting of options, warrants, commitments,
    subscriptions, rights to purchase or otherwise), except for the issuance of
    shares of Parent Common Stock by Parent and Cyprus Common Stock by Cyprus
    upon the exercise of stock options or other rights to acquire such party's
    capital stock, in each case which securities, options and rights are
    outstanding as of the date of this Agreement (or as set forth on Section
    4.7(a) of the Cyprus Disclosure Schedule) and such issuance is made in
    accordance with the terms of such securities, options and rights in effect
    on the date of this Agreement;

         (j) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, except in the ordinary course of business in
    connection with employee incentive and benefit plans, programs or
    arrangements in existence on the date hereof, purchase or redeem any shares
    of its stock or any rights, warrants or options to acquire any such shares;

         (k) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, incur, assume or prepay any indebtedness or any
    other material liabilities, other than indebtedness between such party and a
    wholly owned Subsidiary or between wholly owned Subsidiaries, provided, in
    either such case, such wholly owned Subsidiaries remain wholly owned
    Subsidiaries, and other than in the ordinary course of business consistent
    with past practice;

         (l) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, sell, lease, license, mortgage or otherwise encumber
    or subject to any Lien or otherwise dispose of any of its properties or
    assets (including securitizations), other than in the ordinary course of
    business consistent with past practice and other than the consummation of
    contracts of sale executed and delivered prior to the date hereof;

         (m) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, take any action that would reasonably be expected to
    cause the Cyprus Merger not to constitute transactions described in Section
    368(a) of the Code;

         (n) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, make any material Tax election or settle or
    compromise any material Tax liability, other than in the ordinary course of
    business consistent with past practice and except that Cyprus may make one
    or more Section 338(h)(10) elections (and


                                       29
<PAGE>   38
    corresponding state and local elections) relating to the sale of the Cypress
    Amax Coal Company and its Subsidiaries; and

         (o) none of the parties shall, and none of the parties shall permit any
    of its Subsidiaries to, agree, in writing or otherwise, to take any of the
    foregoing actions or take any action which would (i) make any representation
    or warranty made by such party in Article IV hereof untrue or incorrect or
    (ii) result in any of the conditions to the Cyprus Merger set forth in
    Article VI not being satisfied.

         Section 5.2 Investigation.

         (a) Each of Cyprus on the one hand and Parent on the other hand shall
(and shall cause its respective Subsidiaries to) afford to the other and the
other's officers, employees, accountants, counsel and other authorized
representatives full and complete access on reasonable prior notice during
normal business hours, throughout the period prior to the earlier of the
Effective Time or the Termination Date, to its and its Subsidiaries' properties,
contracts, commitments, books, and records (including but not limited to Tax
Returns) and any report, schedule or other document filed or received by it or
any of its Subsidiaries pursuant to the requirements of federal or state
securities laws or filed with or sent to the SEC, the Department of Justice, the
Federal Trade Commission or any other Governmental Entity and shall use their
reasonable best efforts to cause their respective representatives and
Subsidiaries to furnish promptly to one another such additional financial and
operating data and other information as to its and its Subsidiaries' respective
businesses and properties as the other or its duly authorized representatives
may from time to time reasonably request; provided that nothing herein shall
require any of Parent or Cyprus or any of their respective Subsidiaries to
disclose any information to the other that would cause significant competitive
harm to such disclosing party or its affiliates if the transactions contemplated
by this Agreement are not consummated. Cyprus hereby agrees that it will treat
any such information in accordance with the Confidentiality Agreement, dated as
of May 18, 1999 between Cyprus and ASARCO Incorporated (the "Confidentiality
Agreement"). Notwithstanding any provision of this Agreement to the contrary, no
party shall be obligated to make any disclosure in violation of applicable laws
or regulations.

         (b) Each of Parent and Cyprus will not, and will cause its officers,
employees, accountants, counsel and representatives not to, use any information
obtained pursuant to this Section 5.2 for any purpose unrelated to the
consummation of the transactions contemplated by this Agreement. Pending
consummation of the transactions herein contemplated, each of Parent and Cyprus
will keep confidential, and will cause its officers, employees, accountants,
counsel and representatives to keep confidential, all information and documents
obtained pursuant to this Section 5.2 unless such information (i) was already
known to it, (ii) becomes available to it from other sources not known by it to
be bound by a confidentiality obligation, (iii) is independently acquired by it
as a result of work carried out by any of its employees or representatives to
whom no disclosure of such information has been made, or (iv) is disclosed with
the prior written approval of the other party. Upon any termination of this
Agreement, each of Parent and Cyprus


                                       30
<PAGE>   39
will, upon request by the other party, collect and deliver to the other party
all documents obtained by it or any of its officers, employees, accountants,
counsel and representatives then in their possession and any copies thereof.
Each of Parent and Cyprus and their respective representatives shall not contact
any distributors, suppliers, employees or customers of the other party in
connection with or in discussion of the transactions contemplated hereby without
the other party's prior consent.

         Section 5.3 Stockholder Approvals and Other Cooperation.

         (a) If required by law, as soon as practicable following consummation
of the Offer, Parent and Cyprus shall together, or pursuant to any reasonable
allocation of responsibility between them:

         (i) prepare and file confidentially with the SEC as soon as is
    reasonably practicable the Information Statement in preliminary form and
    promptly cause Parent to amend as necessary the registration statement on
    Form S-4 under the Securities Act (Registration No. 333-86063), which was
    declared effective by the SEC on September 2, 1999, with respect to the
    Parent Common Stock issuable in the Cyprus Merger (collectively, the
    "Registration Statement"), and shall use their reasonable best efforts to
    have the Information Statement cleared by the SEC under the Exchange Act;

         (ii) as soon as is reasonably practicable, take all such action as may
    be required under state blue sky or securities laws in connection with the
    issuance of shares of Parent Common Stock in the Cyprus Merger and as
    contemplated by this Agreement;

         (iii) promptly prepare and file with the NYSE and such other stock
    exchanges as shall be agreed upon listing applications covering the shares
    of Parent Common Stock issuable in the Cyprus Merger, upon exercise of
    Cyprus stock options, warrants, conversion rights or other rights or vesting
    or payment of other Cyprus equity-based awards and use its reasonable best
    efforts to obtain, prior to the Effective Time, approval for the listing of
    such Parent Common Stock, subject only to official notice of issuance;

         (iv) cooperate with one another in order to lift any injunctions or
    remove any other impediment to the consummation of the transactions
    contemplated herein; and

         (v) cooperate with one another in obtaining (i) an opinion of Shearman
    & Sterling, special counsel to Parent, dated as of the date of the Effective
    Time, to the effect that the Cyprus Offer together with the Cyprus Merger
    will qualify as a reorganization under Section 368(a) of the Code, and (ii)
    an opinion of Wachtell, Lipton, Rosen & Katz, special counsel to Cyprus,
    dated as of the date of the Effective Time, to the effect that the Cyprus
    Offer together with the Cyprus Merger will qualify as a reorganization under
    Section 368(a) of the Code. In connection therewith, each of Cyprus and
    Parent shall deliver to Shearman & Sterling and Wachtell, Lipton, Rosen &
    Katz customary

                                       31

<PAGE>   40
    representation letters in substantially the form previously reviewed by such
    counsel (the representation letters referred to in this sentence are,
    collectively, the "Tax Certificates").

         (b) Subject to the limitations contained in Section 5.2, Parent on the
one hand and Cyprus on the other hand shall each furnish to the other and to the
other's counsel all such information as may be required in order to effect the
foregoing actions and each represents and warrants to the other that no
information furnished by it in connection with such actions or otherwise in
connection with the consummation of the transactions contemplated by this
Agreement will contain any untrue statement of a material fact or omit to state
a material fact required to be stated in order to make any information so
furnished, in light of the circumstances under which it is so furnished, not
misleading.

         (c) (i) Cyprus shall cause the Information Statement to be mailed to
Cyprus's shareholders, in each case as promptly as practicable after the
Registration Statement (and any post-effective amendments thereto) is declared
effective under the Securities Act.

         (ii) Parent shall hold a meeting of its stockholders (the "Parent
Shareholder Meeting") as provided in the Phelps Dodge Proxy Statement dated
September 13, 1999 as supplemented by the Proxy Statement Supplement dated
September 22, 1999 (as the same may be further amended or supplemented, the
"Phelps Dodge Proxy Statement") for the purpose of obtaining the Parent
Shareholder Approval. Parent shall, through its Board of Directors, recommend to
its shareholders the approval of the Share Issuance and the other transactions
contemplated hereby unless the Board of Directors of Parent determines in good
faith, after consultation with outside counsel, that to do so would be
inconsistent with its obligations under applicable Law.

         (iii) Cyprus shall, as soon as practicable following the date of this
Agreement, duly call, give notice of, convene and hold a meeting of its
stockholders (the "Cyprus Shareholder Meeting") for the purpose of obtaining the
Cyprus Shareholder Approval. Cyprus shall, subject to Section 5.9(b), through
the Cyprus Board, recommend to its shareholders the adoption of this Agreement,
the Cyprus Merger and the other transactions contemplated hereby.

         (iv) Each of Parent and Cyprus will use their best efforts to hold the
Parent Shareholder Meeting and the Cyprus Shareholder Meeting as soon as
practicable after the date hereof.

         (v) Parent shall vote, or cause to be voted, all of the Cyprus Common
Stock then owned by it or any of its Subsidiaries or over which it has direct or
indirect voting authority in favor of the approval of the Cyprus Merger and of
the approval and adoption of this Agreement.

         (d) Promptly upon the purchase by SubC of shares of Cyprus Common Stock
pursuant to the Cyprus Offer, and from time to time thereafter, Parent shall be
entitled to

                                       32

<PAGE>   41
designate up to such number of directors, rounded up to the next whole number,
on the Cyprus Board as shall give Parent representation on the Cyprus Board
equal to the product of the total number of directors on the Cyprus Board
(giving effect to the directors elected pursuant to this sentence) multiplied by
the percentage that the aggregate number of such shares beneficially owned by
Parent and affiliates of Parent following such purchase bears to the total
number of such shares then outstanding, and Cyprus shall, at such time, promptly
take all actions necessary to cause Parent's designees to be elected as
directors, including increasing the size of the Cyprus Board or securing the
resignations of incumbent directors or both. At such times, Cyprus shall use its
best efforts to cause persons designated by Parent to constitute the same
percentage as persons designated by Parent shall constitute of such Board of
each committee of such Board, in each case only to the extent permitted by
applicable law. Notwithstanding the foregoing, until the earlier of (i) the time
Parent acquires a majority of the then outstanding shares on a fully diluted
basis and (ii) the Effective Time, Cyprus shall use its best efforts to ensure
that all the members of the Cyprus Board and each committee of the Cyprus Board
as of the date hereof who are not employees of Cyprus shall remain members of
the Cyprus Board and of such committees. Cyprus shall promptly take all actions
required pursuant to Section 14(f) of the Exchange Act and Rule 14f-1
promulgated thereunder in order to fulfill its obligations under this Section
5.3(d) and shall include in its Schedule 14D-9 such information with respect to
Cyprus and its officers and directors as is required under Section 14(f) and
Rule 14f-1 to fulfill such obligations. Parent shall supply to Cyprus and be
solely responsible for any information with respect to it and its nominees,
officers, directors and affiliates required by such Section 14(f) and Rule
14f-1. Following the election of designees of Parent pursuant to this Section
5.3(d), prior to the Effective Time, any amendment of this Agreement or the
Certificate of Incorporation or By-laws of Cyprus, any termination of this
Agreement by Cyprus or any extension by Cyprus of the time for the performance
of any of the obligations or other acts of Parent or waiver of any of Cyprus'
rights hereunder shall require the concurrence of a majority of the directors of
Cyprus then in office who are neither (i) designees of Parent nor (ii) employees
of Cyprus.

         Section 5.4 Affiliate Agreements. Cyprus shall, as soon as practicable,
deliver to Parent a list (reasonably satisfactory to counsel for Parent),
setting forth the names and addresses of all persons who will be, at the time of
the Cyprus Shareholder Meeting, in Cyprus' reasonable judgment, "affiliates" of
Cyprus for purposes of Rule 145 under the Securities Act. Cyprus shall furnish
such information and documents as Parent may reasonably request for the purpose
of reviewing such list. Cyprus shall use its reasonable best efforts to cause
each person who is identified as an "affiliate" in the list furnished pursuant
to this Section to execute a written agreement on or prior to the mailing of the
Information Statement, in substantially the form of Exhibit A hereto.

         Section 5.5 Cyprus Employee Stock Options, Incentive and Benefit Plans.

         (a) Simultaneously with the Cyprus Merger, (i) each outstanding option
("Cyprus Stock Options") and related stock appreciation right ("Cyprus SAR"), if
any, to purchase or acquire a share of Cyprus Common Stock under employee
incentive or benefit plans,

                                       33

<PAGE>   42
programs or arrangements and non-employee director plans presently maintained by
Cyprus ("Cyprus Option Plans") shall be converted into an option (together with
a related stock appreciation right of Parent, if applicable) to purchase the
number of shares of Parent Common Stock equal to the Cyprus Stock Consideration
times the number of shares of Cyprus Common Stock which could have been obtained
prior to the Effective Time upon the exercise of each such option, at an
exercise price per share equal to the exercise price for each such share of
Cyprus Common Stock subject to an option (and related Cyprus SAR, if any) under
the Cyprus Option Plans divided by the Cyprus Stock Consideration, and all
references to Cyprus in each such option (and related Cyprus SAR, if any) shall
be deemed to refer to Parent, where appropriate, and (ii) Parent shall assume
the obligations of Cyprus under the Cyprus Option Plans. The other terms of each
such Cyprus Stock Option and Cyprus SAR, and the plans under which they were
issued, shall continue to apply in accordance with their terms, including any
provisions providing for acceleration of vesting or payment.

         (b) Simultaneously with the Cyprus Merger, each outstanding award
including restricted stock, performance units, share units and performance
shares ("Cyprus Award") under any employee incentive or benefit plans, programs
or arrangements and non-employee director plans presently maintained by Cyprus
which provide for grants of equity-based awards shall be amended or converted
into a similar instrument of Parent, in each case with such adjustments to the
terms of such Cyprus Awards as are appropriate to preserve the value inherent in
such Cyprus Awards with no detrimental effects on the holders thereof. The other
terms of each Cyprus Award, and the plans or agreements under which they were
issued, shall continue to apply in accordance with their terms, including any
provisions providing for acceleration. With respect to any restricted stock
awards as to which the restrictions shall have lapsed on or prior to the
Effective Time in accordance with the terms of the applicable plans or award
agreements, shares of such previously restricted stock shall be converted in
accordance with the provisions of Section 3.1(b).

         (c) Prior to the Effective Time, Cyprus shall amend each of its
employee incentive or benefit plans, programs and arrangements and non-employee
director plans, to the extent necessary and appropriate, to reflect the
transactions contemplated by this Agreement, including, but not limited to the
conversion of shares of Cyprus Common Stock held or to be awarded or paid
pursuant to such benefit plans, programs or arrangements into shares of Parent
Common Stock, on a basis consistent with the transactions contemplated by this
Agreement and, to the extent not inconsistent with the transactions contemplated
by this Agreement, the terms of such plans, programs and arrangements. At or
prior to the Effective Time, Parent shall take all corporate action necessary to
reserve for issuance a sufficient number of shares of Parent Common Stock for
delivery upon exercise of the Cyprus Stock Options. As soon as practicable after
the Effective Time, Parent shall file a registration statement on Form S-3 or
Form S-8, as the case may be (or any successor or other appropriate forms), with
respect to the Parent Common Stock subject to such Cyprus Stock Options, and
shall maintain the effectiveness of such registration statement and the current
status of the prospectus or prospectuses contained therein, for so long as such
Cyprus Stock Options remain outstanding.

                                       34

<PAGE>   43
         (d) Parent and its Subsidiaries and affiliates agree to honor in
accordance with their terms the Cyprus Employee Benefit Plans, including,
without limitation, any rights or benefits arising thereunder as a result of the
transactions contemplated by this Agreement (either alone or in combination with
any other event). It is the intention of the parties hereto that, for a period
of one year from the Effective Time, Parent and its Subsidiaries continue to
maintain the Cyprus Employee Benefit Plans, in each case in accordance with
their terms as in effect at the Effective Time, with only such amendments as are
required by applicable law or permitted by the terms thereof as in effect at the
Effective Time, and which do not adversely affect the rights of participants (or
their beneficiaries) thereunder.

         (e) Parent shall take, and shall cause the Surviving Corporation and
its Subsidiaries and all other affiliates of Parent to take, the following
actions: (i) waive any limitations regarding pre-existing conditions and
eligibility waiting periods under any welfare or other employee benefit plan
maintained by any of them for the benefit of employees of Cyprus or any of its
Subsidiaries immediately prior to the Effective Time (the "Cyprus Employees") or
in which Cyprus Employees participate after the Effective Time, (ii) provide
each Cyprus Employee with credit for any co-payments and deductibles paid prior
to the Effective Time for the calendar year in which the Effective Time occurs,
in satisfying any applicable deductible or out-of-pocket requirements under any
welfare plans that such employees are eligible to participate in after the
Effective Time, and (iii) for all purposes (other than for purposes of benefit
accruals under any defined benefit pension plan) under all compensation and
benefit plans and policies applicable to Cyprus Employees, treat all service by
Cyprus Employees with Cyprus or any of its Subsidiaries or affiliates before the
Effective Time as service with Parent and its Subsidiaries and affiliates.

         (f) As of the Effective Time, Parent shall guarantee the performance of
the employment contracts and Cyprus Employee Benefit Plans in accordance with
their respective terms and the terms of this Agreement. Notwithstanding anything
contained herein or in any employment contract or Cyprus Employee Benefit Plan
to the contrary, Parent acknowledges and agrees that, for purposes of all
employment contracts and Cyprus Employee Benefit Plans, the transactions
contemplated by this Agreement are, or will be deemed to be, a "change of
control."

         Section 5.6 Filings; Other Action.

         (a) Subject to the terms and conditions herein provided, Parent and
Cyprus shall (i) promptly make all filings necessary in connection with their
respective Required Statutory Approvals, (ii) use reasonable best efforts to
cooperate with one another in (x) determining whether any filings are required
to be made with, or consents, permits, authorizations or approvals are required
to be obtained from, any third party or other governmental or regulatory bodies
or authorities of federal, state, local and this and such required to be foreign
jurisdictions in connection with the execution and delivery of this Agreement
and the consummation of the transactions contemplated hereby thereby and (y)
timely making all such filings and timely seeking all consents, permits,
authorizations or approvals, including such party's Required Third Party
Consents. The parties shall cooperate with one another in

                                       35

<PAGE>   44
connection with the making of all such filings, including providing copies of
all such documents to the non-filing or non-submitting party and its advisors
prior to filing or otherwise submitting.

         (b) (i) Without limiting the generality of the undertakings of Parent
and Cyprus pursuant to Section 5.6(a), Parent agrees to obtain the expiration or
termination of the applicable waiting periods under the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended (the "HSR Act"), and applicable
foreign statutes, rules, regulations, orders, decrees, administrative and
judicial doctrines and other laws that are designed or intended to prohibit,
restrict or regulate actions having the purpose or effect of monopolization,
restraint of trade or limitation of competition (collectively, "Antitrust
Laws"), which obligation shall be unconditional and shall be not be qualified by
best efforts (regardless of whether fulfillment of such obligation would have a
Material Adverse Effect on Parent or Cyprus). The existence of the condition set
forth in Section 6.1(a) shall not limit or diminish Parent's obligations
pursuant to the foregoing sentence or relieve Parent of any liability or damages
that may result from its breach of its obligations under this Section 5.7(b)(i)
(nor limit the obligations of Cyprus pursuant to the following sentence or
relieve them of any liability or damages that may result from their breach of
obligations under this Section 5.7(b)(i)). In connection with the foregoing,
Cyprus will cooperate with and assist Parent, and, with respect to matters that
are within its power or control will use its best efforts to promptly (i) take,
or cause to be taken, all actions and to do, or cause to be done, all things
necessary, proper or advisable under applicable Antitrust Laws and regulations
to consummate the transactions contemplated by this Agreement as soon as
practicable, including, without limitation, preparing and filing as promptly as
practicable all documentation to effect all necessary filings, notices,
petitions, statements, registrations, submissions of information, applications
and other documents, and (ii) obtain and maintain all approvals, consents,
registrations, permits, authorizations and other confirmations required to be
obtained from any third party that are necessary, proper or advisable to
consummate the Cyprus Merger and the other transactions contemplated by this
Agreement. At Parent's request, Cyprus will commit to and implement any
divestiture, hold separate or similar transaction or action with respect to any
asset or business of Cyprus, which commitment and implementation may, at Cyprus'
option, be conditioned upon and effective as of the Closing Date. Subject to
applicable laws relating to the exchange of information, Parent and Cyprus shall
have the right to review in advance, and to the extent practicable each will
consult one another on, all the information relating to their respective
Subsidiaries, that appears in any filing made with, or written materials
submitted to, any third party and/or any Governmental Entity in connection with
the Cyprus Merger and the other transactions contemplated by this Agreement.

         (ii) In furtherance and not in limitation of the foregoing, and to the
extent that any such action has not heretofore been taken or completed, each of
Parent and Cyprus agrees to (i) make an appropriate filing of a Notification and
Report Form pursuant to the HSR Act with respect to the transactions
contemplated hereby as promptly as practicable and in any event within ten
business days of the date hereof, (ii) supply as promptly as practicable any
additional information and documentary material that may be requested pursuant
to the HSR Act and (iii) complete the review process under the HSR Act to permit
the consummation of the Cyprus

                                       36

<PAGE>   45
Merger including, but not limited to, causing the expiration of termination of
the applicable waiting periods under the HSR Act as soon as practicable.

         Section 5.7 Further Assurances. In case at any time after the Effective
Time any further action is necessary or desirable to carry out the purposes of
this Agreement, the proper officers and directors of each of the parties to this
Agreement shall take all such necessary action.

         Section 5.8 Takeover Statute. If any "fair price," "moratorium,"
"control share acquisition" or other form of antitakeover statute or regulation
shall become applicable to the transactions contemplated hereby, Cyprus and the
Cyprus Board shall grant such approvals and take such actions as are reasonably
necessary so that the transactions contemplated hereby may be consummated as
promptly as practicable on the terms contemplated hereby and otherwise act to
eliminate or minimize the effects of such statute or regulation on the
transactions contemplated hereby.

         Section 5.9 No Solicitation by Cyprus.

         (a) Cyprus shall not, nor shall it permit any of its Subsidiaries to,
authorize or permit any of its directors, officers or employees or any
investment banker, financial advisor, attorney, accountant or other
representative retained by it or any of its Subsidiaries to, directly or
indirectly through another person, (i) solicit, initiate or encourage (including
by way of furnishing information), or take any other action designed to
facilitate, any inquiries or the making of any proposal which constitutes any
Cyprus Takeover Proposal (or reasonably could be expected to lead to a Cyprus
Takeover Proposal) or (ii) participate in any discussions or negotiations
regarding any Cyprus Takeover Proposal; provided, however, that if the Cyprus
Board determines in good faith, after consultation with its outside counsel and
its financial advisor, that such Cyprus Takeover Proposal is reasonably capable
of being completed, taking into account all legal, financial, regulatory and
other aspects of the proposal and would, if consummated, result in a transaction
more favorable to Cyprus' shareholders than the transaction contemplated by this
Agreement, Cyprus may, in response to a Cyprus Takeover Proposal which was not
solicited by it or which did not otherwise result from a breach of this Section
5.9(a), and subject to providing prior written notice of its decision to take
such action to Parent (the "Cyprus Notice") (x) furnish information with respect
to Cyprus and its subsidiaries to any person making a Cyprus Takeover Proposal
pursuant to a customary confidentiality agreement (as determined by Cyprus after
consultation with its outside counsel) and (y) participate in discussions or
negotiations regarding such Cyprus Takeover Proposal. For purposes of this
Agreement, "Cyprus Takeover Proposal" means any inquiry, proposal or offer (or
any improvement, restatement, amendment, renewal or reiteration thereof) from
any person relating to any direct or indirect acquisition or purchase of a
business or shares of any class of equity securities of Cyprus or any of its
Subsidiaries, any tender offer or exchange offer that if consummated would
result in any person beneficially owning any class of equity securities of
Cyprus or any of its Subsidiaries, or any merger, consolidation, business
combination, recapitalization, liquidation, dissolution or similar transaction
involving Cyprus or any of its Subsidiaries, other than the transactions

                                       37

<PAGE>   46
contemplated by this Agreement (including the items listed on Section 5.1(g) of
the Cyprus Disclosure Schedule).

         (b) Except as expressly permitted by this Section 5.9, neither the
Cyprus Board nor any committee thereof shall (i) withdraw or modify, or propose
publicly to withdraw or modify, in a manner adverse to Parent, the
recommendation by such Board or such committee of the Cyprus Merger or this
Agreement, (ii) approve or recommend, or propose publicly to approve or
recommend, any Cyprus Takeover Proposal or (iii) cause Cyprus to enter into any
letter of intent, agreement in principle, acquisition agreement or other similar
agreement (each, a "Cyprus Acquisition Agreement") related to any Cyprus
Takeover Proposal. Notwithstanding the foregoing, in the event that the Cyprus
Board receives a Cyprus Takeover Proposal and the Cyprus Board determines in
good faith, after consultation with its outside counsel and its financial
advisor, that such Cyprus Takeover Proposal is reasonably capable of being
completed, taking into account all legal, financial, regulatory and other
aspects of the proposal and would, if consummated, result in a transaction more
favorable to Cyprus' shareholders than the transaction contemplated by this
Agreement, the Cyprus Board may (x) take any of the actions described in clauses
(i), (ii) or (iii) above or (y) terminate this Agreement (and concurrently with
or after such termination, if it so chooses, cause Cyprus to enter into any
Cyprus Acquisition Agreement with respect to any Cyprus Takeover Proposal) but
only after the fifth business day following Parent's receipt of written notice
advising Parent that the Cyprus Board is prepared to accept a Cyprus Takeover
Proposal, specifying the material terms and conditions of such Cyprus Takeover
Proposal and identifying the person making such Cyprus Takeover Proposal.

         (c) In addition to the obligations of Cyprus set forth in paragraphs
(a) and (b) of this Section 5.9, Cyprus shall immediately advise Parent orally
and in writing of any request for information or of any Cyprus Takeover
Proposal, including the material terms and conditions of such request or Cyprus
Takeover Proposal and the identity of the person making such request or Cyprus
Takeover Proposal. Cyprus will keep Parent reasonably informed of the status and
details (including amendments or proposed amendments) of any such request or
Cyprus Takeover Proposal.

         (d) Nothing contained in this Section 5.9 shall prohibit Cyprus from
taking and disclosing to its shareholders a position contemplated by Rule
14e-2(a) promulgated under the Exchange Act or from making any disclosure to
Cyprus' shareholders if, in the good faith judgment of the Cyprus Board, after
consultation with outside counsel, failure so to disclose would be inconsistent
with its obligations under applicable Law. At the meeting of the Cyprus Board at
which this Agreement was considered, authorized and approved, held September 30,
1999, the Cyprus Board unanimously declared it advisable that Cyprus's
shareholders adopt and approve this Agreement. Notwithstanding any subsequent
determination by the Cyprus Board to change such recommendation, this Agreement
shall be submitted to the shareholders of Cyprus at the Cyprus Shareholder
Meeting for the purpose of obtaining the Cyprus Shareholder Approval and nothing
contained herein shall be deemed to relieve Cyprus of such obligation.


                                       38

<PAGE>   47
         Section 5.10 Public Announcements. Parent on the one hand and Cyprus on
the other hand will consult with and provide each other the reasonable
opportunity to review and comment upon any press release prior to the issuance
of any press release relating to this Agreement or the transactions contemplated
herein and shall not issue any such press release prior to such consultation
except as may be required by Law or by obligations pursuant to any listing
agreement with any national securities exchange.

         Section 5.11 Indemnification and Insurance.

         (a) Parent agrees that all rights to exculpation and indemnification
for acts or omissions occurring prior to the Effective Time now existing in
favor of the current or former directors or officers (the "Cyprus Indemnified
Parties") of Cyprus as provided in its charter or by-laws or in any agreement
shall survive the Cyprus Merger and shall continue in full force and effect in
accordance with their terms. For six years from the Effective Time, Parent shall
indemnify the Cyprus Indemnified Parties to the same extent as such Cyprus
Indemnified Parties are entitled to indemnification pursuant to the preceding
sentence.

         (b) For three years from the Effective Time, Parent shall maintain in
effect Cyprus' current directors' and officers' liability insurance policy (the
"Cyprus Policy") covering those persons who are currently covered by the Cyprus
Policy (a copy of which has been heretofore delivered to Parent); provided,
however, that in no event shall Parent be required to expend in any one year an
amount in excess of 150% of the annual premiums currently paid by Cyprus for
such insurance, and provided further that if the annual premiums of such
insurance coverage exceed such amount, Parent shall be obligated to obtain a
policy with the greatest coverage available for a cost not exceeding such
amount; and provided further that Parent may meet its obligations under this
paragraph by covering the above people under Parent's insurance policy or
policies on the terms described above.

         Section 5.12 Accountants' "Comfort" Letters. Parent on the one hand and
Cyprus on the other hand will each use reasonable best efforts to cause to be
delivered to the other two letters from their respective independent
accountants, one dated a date within two business days before the date of the
Registration Statement (as amended in accordance with Section 5.3(a)(i)) and one
dated a date within two business days before the Effective Time, in form and
substance reasonably satisfactory to the recipient and customary in scope for
comfort letters delivered by independent accountants in connection with
registration statements similar to the Registration Statement.

         Section 5.13 Additional Reports. Parent on the one hand and Cyprus on
the other hand shall each furnish to the other copies of any reports of the type
referred to in Section 4.5 which it files with the SEC on or after the date
hereof, and each of Parent and Cyprus, as the case may be, represents and
warrants that as of the respective dates thereof, such reports will not contain
any untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary to make the statement therein, in
light of the circumstances under

                                       39

<PAGE>   48
which they were made, not misleading. Any unaudited consolidated interim
financial statements included in such reports (including any related notes and
schedules) will fairly present the financial position of Parent and its
consolidated Subsidiaries or Cyprus and its consolidated Subsidiaries, as the
case may be, as of the dates thereof and the results of operations and changes
in financial position or other information included therein for the periods or
as of the date then ended (subject, where appropriate, to normal year-end
adjustments), in each case in accordance with past practice and GAAP
consistently applied during the periods involved (except as otherwise disclosed
in the notes thereto).

         Section 5.14 Disclosure Schedule Supplements. From time to time after
the date of this Agreement and prior to the Effective Time, Parent will promptly
supplement or amend the Parent Disclosure Schedule with respect to any matter
hereafter arising which, if existing or occurring at or prior to the date of
this Agreement, would have been required to be set forth or described in the
Parent Disclosure Schedule or which is necessary to correct any information in a
schedule or in any representation and warranty of Parent which has been rendered
inaccurate thereby. From time to time after the date of this Agreement and prior
to the Effective Time, Cyprus will promptly supplement or amend the Cyprus
Disclosure Schedule with respect to any matter hereafter arising which, if
existing or occurring at or prior to the date of this Agreement, would have been
required to be set forth or described in the Cyprus Disclosure Schedule or which
is necessary to correct any information in a schedule or in any representation
and warranty of Cyprus which has been rendered inaccurate thereby, other than
Section 5.1(g) thereof which Cyprus shall have no authority to amend. For
purposes of determining the accuracy of the representations and warranties of
Parent and Cyprus contained in this Agreement in order to determine the
fulfillment of the conditions set forth in Article VI, the Parent Disclosure
Schedule and the Cyprus Disclosure Schedule shall be deemed to include only that
information contained therein on the date of this Agreement and shall be deemed
to exclude any information contained in any subsequent supplement or amendment
thereto.

         Section 5.15 Certain Litigation. Each of the parties shall prior to or
at the Effective Time cease, terminate and dismiss, with prejudice, any and all
actions, proceedings or lawsuits initiated, commenced or filed by such party
against the other party in connection with (i) the Combination and (ii) Parent's
exchange offers dated as of September 3, 1999, as amended, for Cyprus and each
of the parties shall use its reasonable best efforts to cause any and all
actions, proceedings or lawsuits initiated, commenced or filed by third parties
in connection with the transactions in the above (i) and (ii) to cease,
terminate or be dismissed, with prejudice.

         Section 5.16 Shareholder Litigation. Each of Parent on the one hand and
Cyprus on the other hand shall give the other the reasonable opportunity to
participate in the defense of any shareholder litigation against Parent or
Cyprus, as applicable, and its directors relating to the transactions
contemplated by this Agreement.

         Section 5.17 Section 16(b). Parent and Cyprus shall take all steps
reasonably necessary to cause the transactions contemplated hereby and any other
dispositions of equity

                                       40

<PAGE>   49
securities of Cyprus (including derivative securities) or acquisitions of Parent
equity securities (including derivative securities) in connection with this
Agreement by each individual who is a director or officer of Cyprus to be exempt
under Rule 16b-3 under the Exchange Act.

         Section 5.18 Change of Control Agreements. Cyprus has change of control
employment agreements with the 16 people listed in Section 5.18(a) of the Cyprus
Disclosure Schedule which provide certain benefits upon a termination of
employment for "good reason" or other than for "cause" following the Effective
Time. Parent shall take all appropriate steps necessary to, and will, give
reasonable advance notice prior to the Effective Time of its intention to offer
employment (including the proposed terms thereof), or not to offer employment,
to each of the aforementioned 16 people and will make such offers in the former
case, all sufficiently in advance of the Effective Time to afford such offerees
reasonable time prior to the Effective Time to decide whether or not to accept
the employment offered prior to the Effective Time. Cyprus has previously made
written disclosure to ASARCO for each of such 16 people and for all such people
in the aggregate of the total estimated amount payable to such people for all
obligations owed to them by Cyprus under all contractual and plan arrangements
with such people assuming that the employment of each such person was terminated
effective as of December 31, 1999 (except that retirement and supplemental
retirement benefits are calculated as of January 1, 1999).


                                   ARTICLE VI

                         CONDITIONS TO THE CYPRUS MERGER

         Section 6.1 Conditions to Each Party's Obligation to Effect the Cyprus
Merger. The respective obligations of Parent and Cyprus to effect the Cyprus
Merger shall be subject to the fulfillment at or prior to the Effective Time of
the following conditions:

         (a) The Parent Shareholder Approval and the Cyprus Shareholder Approval
    necessary to consummate the transactions contemplated by this Agreement
    shall have been obtained, all in accordance with applicable Law.

         (b) No statute, rule, regulation, executive order, decree, ruling or
    injunction shall have been enacted, entered, promulgated or enforced by any
    court or other tribunal or governmental body or authority which prohibits or
    makes illegal the consummation of the Cyprus Merger substantially on the
    terms contemplated hereby. In the event any order, decree or injunction
    shall have been issued, each party shall use its reasonable efforts to
    remove any such order, decree or injunction.

         (c) SubC shall have accepted for exchange all shares of Cyprus Common
    Stock validly tendered and not withdrawn pursuant to the Cyprus Offer;
    provided, however, that this condition shall not be applicable to the
    obligations of SubC if, in

                                       41

<PAGE>   50
    breach of this Agreement, SubC fails to accept for exchange and exchange any
    such shares validly tendered and not withdrawn pursuant to such Offer.


                                   ARTICLE VII

                        TERMINATION, WAIVER AND AMENDMENT

         Section 7.1 Termination. This Agreement may be terminated at any time
prior to the Effective Time:

         (a) by mutual consent of the Boards of Directors of Parent and Cyprus;

         (b) by either Parent or Cyprus if, without fault of such terminating
    party, the purchase of Cyprus Common Stock pursuant to the Cyprus Offer
    shall not have occurred on or before March 31, 2000, which date may be
    extended by mutual written consent of the parties hereto;

         (c) by Parent or Cyprus if the Cyprus Offer expires or is terminated or
    withdrawn pursuant to its terms without any Cyprus Common Stock being
    purchased thereunder; or

         (d) by either Parent or Cyprus if any court of competent jurisdiction
    or other governmental body shall have issued an order (other than a
    temporary restraining order), decree or ruling or taken any other action
    restraining, enjoining or otherwise prohibiting the purchase of Cyprus
    Common Stock pursuant to the Cyprus Offer or the Cyprus Merger, and such
    order, decree, ruling or other action shall have become final and
    nonappealable; provided that the party seeking to terminate this Agreement
    shall have used its reasonable best efforts, subject to Section 5.7, to
    remove or lift such order, decree or ruling; or any statute, rule,
    regulation, order, injunction or decree shall have been enacted, entered,
    promulgated or enforced by any court, administrative agency or commission or
    other governmental authority or instrumentality which prohibits or makes
    illegal the consummation of the Cyprus Offer or the Cyprus Merger and which,
    in the case of any such order, injunction or decree, shall have become final
    and nonappealable; or there shall have been a failure to obtain any required
    consent or approval under foreign laws or regulations which would prohibit
    the consummation of the Cyprus Offer or the Cyprus Merger or would have a
    material adverse effect on Parent or on Cyprus.

         Section 7.2 Termination by Parent. This Agreement may be terminated and
the Cyprus Offer and the Cyprus Merger may be abandoned by action of the Board
of Directors of Parent, at any time prior to the purchase of Cyprus Common Stock
pursuant to the Cyprus Offer, if (a) the Cyprus Board shall withdraw, modify or
change its recommendation or approval in respect of this Agreement or the Cyprus
Offer in a manner adverse to Parent, (b) the Cyprus

                                       42

<PAGE>   51
Board shall have recommended any proposal other than by Parent in respect of a
Cyprus Takeover Proposal, (c) a Cyprus Takeover Proposal other than by Parent
shall be publicly disclosed and at the scheduled expiration of the Cyprus Offer
the Minimum Tender Condition shall not have been satisfied, or (d) the condition
to the Cyprus Offer described in clause (e) of Annex A hereto shall not have
been satisfied within 30 days of notice that such condition has not been
satisfied.

         Section 7.3 Termination by Cyprus. This Agreement may be terminated and
the Cyprus Merger may be abandoned by action of the Cyprus Board, at any time
prior to the acceptance for payment of shares under the Cyprus Offer, (a) if
there shall be a material breach of any of Parent's representations, warranties
or covenants hereunder, which breach shall not be cured within ten days of
notice thereof, or (b) provided Cyprus is not in breach of any obligation under
this Agreement, to allow Cyprus to enter into an agreement in respect of a
Cyprus Takeover Proposal which the Cyprus Board determines is reasonably capable
of being completed, taking into account all legal, financial, regulatory and
other aspects of the proposal and would, if consummated, result in a transaction
more favorable to Cyprus' shareholders than the transaction contemplated by this
Agreement (provided that such termination pursuant to this clause (b) shall not
be effective unless and until Cyprus shall have paid to Parent the fee described
in Section 7.5 hereof and shall have complied with Section 5.9(c) and the notice
provisions of Section 5.9(b)).

         Section 7.4 Effect of Termination. In the event of termination of this
Agreement pursuant to Section 7.1, all rights and obligations under this
Agreement as between Parent and Cyprus shall terminate (except for the
provisions of Sections 5.2, 7.5 and 8.2), and there shall be no other liability
on the part of Parent on the one hand or Cyprus on the other hand to the other
except liability arising out of a willful and material breach of this Agreement.

         Section 7.5 Termination Fee. (a) In the event that (i) after the date
hereof and prior to the Cyprus Shareholder Meeting a Cyprus Takeover Proposal
shall have been made known to Cyprus or any of its Subsidiaries or shall have
been made directly to its shareholders generally or any person shall have
publicly announced an intention (whether or not conditional) to make a Cyprus
Takeover Proposal and thereafter this Agreement is terminated by either Parent
or Cyprus pursuant to Section 7.1(b) or (ii) this Agreement is terminated by
Cyprus pursuant to Section 7.3(b), then Cyprus shall promptly pay Parent a fee
equal to $45 million (the "Cyprus Termination Fee"), payable by wire transfer of
same day funds; provided, however, that no Cyprus Termination Fee shall be
payable to Parent pursuant to this paragraph unless and until within 18 months
of such termination Cyprus or any of its Subsidiaries enters into any Cyprus
Acquisition Agreement or consummates any Cyprus Takeover Proposal (for the
purposes of the foregoing proviso the terms "Cyprus Acquisition Agreement" and
"Cyprus Takeover Proposal" shall have the meanings assigned to such terms in
Section 5.9 (except that the reference to the "acquisition or purchase of a
business or shares of any class of equity securities of Cyprus or any of its
Subsidiaries" in the definition of "Cyprus Takeover Proposal" in Section 5.9
shall be deemed to be a reference to the "acquisition or purchase of a business
that constitutes 20% or

                                       43

<PAGE>   52
more of the net revenues, net income or the assets of Cyprus and its
Subsidiaries, taken as a whole, or 20% of any class of equity securities of
Cyprus or any of its Subsidiaries," but such reference shall not include either
of the items set forth in Section 5.1(g) of the Cyprus Disclosure Schedule)) in
which event the Termination Fee shall be payable upon the first to occur of such
events. Cyprus acknowledges that the agreements contained in this Section 7.5(a)
are an integral part of the transactions contemplated by this Agreement, and
that, without these agreements, Parent would not enter into this Agreement;
accordingly, if Cyprus fails promptly to pay the Cyprus Termination Fee, and, in
order to obtain such payment, Parent commences a suit which results in a
judgment against Cyprus for the Cyprus Termination Fee, Cyprus shall pay to
Parent its costs and expenses (including attorneys' fees and expenses) in
connection with such suit, together with interest on the amount of the Cyprus
Termination Fee at the prime rate of Citibank N.A. in effect on the date such
payment was required to be made.

         (b) In the event of termination of this Agreement pursuant to Section
7.1(b) unless Cyprus is at fault in respect thereof, Section 7.1(c), Section
7.1(d) or Section 7.3(a), Parent shall reimburse Cyprus for any termination fee
that it has paid to ASARCO Incorporated ("ASARCO") under Section 7.3 of the
Agreement and Plan of Merger, dated as of July 15, 1999, among Asarco Cyprus
Incorporated, ACO Acquisition Corp., CAM Acquisition Corp., ASARCO Incorporated
and Cyprus Amax Minerals Company (the "ASARCO Merger Agreement") or under
paragraph 3 of Amendment No. 1, dated September 27, 1999, to the ASARCO Merger
Agreement; provided, however, that Parent shall have no obligation to reimburse
Cyprus for any termination fee paid to ASARCO in the event that this Agreement
is terminated as a result of the failure of the condition to the Cyprus Offer
set forth in paragraph (e) of Annex A hereto.

         Section 7.6 Amendment or Supplement. At any time before or after
approval of the matters presented in connection with the Combination by the
shareholders of Cyprus and prior to the Effective Time, this Agreement may be
amended or supplemented in writing by Parent and Cyprus with respect to any of
the terms contained in this Agreement; provided, however, that, following the
purchase of Cyprus Common Stock pursuant to the Cyprus Offer, this Agreement
shall not be amended or supplemented unless any such amendment or supplement is
approved by the vote of the majority of Continuing Directors of Cyprus; and
provided further that following approval by the shareholders of Parent and
Cyprus there shall be no amendment or change to the provisions hereof with
respect to the Merger Consideration as provided herein nor any amendment or
change not permitted under applicable Law, without further approval by the
shareholders of Cyprus. For purposes of this Agreement, "Continuing Director"
shall mean a director who either was a member of the Cyprus Board prior to the
time that Parent exercised its rights under Section 5.3(d) or who subsequently
became a director of Cyprus and whose election, or nomination for election by
the stockholders of Cyprus, was approved by a vote of at least three-quarters of
the Continuing Directors then on the Cyprus Board.

         Section 7.7 Extension of Time, Waiver, Etc. At any time prior to the
Effective Time, Parent on the one hand and Cyprus, as the case may be, on the
other hand, may:

                                       44

<PAGE>   53
         (a) extend the time for the performance of any of the obligations or
    acts of the other party;

         (b) waive any inaccuracies in the representations and warranties of the
    other party contained herein or in any document delivered pursuant hereto;
    or

         (c) subject to the proviso of Section 7.6, waive compliance with any of
    the agreements or conditions of the other party contained herein.

         Notwithstanding the foregoing, no failure or delay by any party in
exercising any right hereunder shall operate as a waiver thereof nor shall any
single or partial exercise thereof preclude any other or further exercise
thereof or the exercise of any other right hereunder. Any agreement on the part
of a party hereto to any such extension or waiver shall be valid only if set
forth in an instrument in writing signed on behalf of such party.


                                  ARTICLE VIII

                                  MISCELLANEOUS

         Section 8.1 No Survival of Representations and Warranties. None of the
representations and warranties in this Agreement or in any instrument delivered
pursuant to this Agreement shall survive the Cyprus Merger.

         Section 8.2 Expenses. Whether or not the Cyprus Merger is consummated,
all costs and expenses incurred in connection with the Cyprus Merger, this
Agreement and the transactions contemplated hereby shall be paid by the party
incurring such expenses, except that (i) the filing fee in connection with any
HSR Act filing or any other Required Statutory Approval, (ii) the commissions
and other out-of-pocket transaction costs, including the expenses and
compensation of the Exchange Agent, incurred in connection with the sale of
Excess Shares, and (iii) all transfer Taxes, shall be shared equally by Parent
and Cyprus.

         Section 8.3 Counterparts; Effectiveness. This Agreement may be executed
in two or more consecutive counterparts, each of which shall be an original,
with the same effect as if the signatures thereto and hereto were upon the same
instrument, and shall become effective when one or more counterparts have been
signed by each of the parties and delivered (by telecopy or otherwise) to the
other parties.

         Section 8.4 Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of New York, without regard
to the principles of conflicts of laws thereof, except to the extent the
provisions of this Agreement are expressly governed by or derive their authority
from the DGCL.


                                       45

<PAGE>   54
         Section 8.5 Notices. All notices and other communications hereunder
shall be in writing (including telecopy or similar writing) and shall be
effective (a) if given by telecopy, when such telecopy is transmitted to the
telecopy number specified in this Section 8.5 and the appropriate telecopy
confirmation is received or (b) if given by any other means, when delivered at
the address specified in this Section 8.5:

         To Parent or SubC:

               Phelps Dodge Corporation
               2600 North Central Avenue
               Phoenix, Arizona  85004-3014

         copies to:

               Shearman & Sterling
               599 Lexington Avenue
               New York, New York  10022
               Attention:  David W. Heleniak
               Telecopy:  (212) 848-7179

         and

               Debevoise & Plimpton
               875 Third Avenue
               New York, New York  10022
               Attention:  Michael W. Blair
               Telecopy:  (212) 909-6836

         To Cyprus:

               Cyprus Amax Minerals Company
               9100 East Mineral Circle
               Englewood, Colorado  80112
               Attention:  Philip C. Wolf, Esq.
               Telecopy:  (303) 643-5049

         copy to:

               Wachtell, Lipton, Rosen & Katz
               51 West 52nd Street
               New York, New York  10019
               Attention:  Elliott V. Stein
               Telecopy:  (212) 403-2000


                                       46

<PAGE>   55
         Section 8.6 Assignment; Binding Effect. Neither this Agreement nor any
of the rights, interests or obligations hereunder shall be assigned by any of
the parties hereto (whether by operation of Law or otherwise) without the prior
written consent of the other parties. Subject to the preceding sentence, this
Agreement shall be binding upon and shall inure to the benefit of the parties
hereto and their respective successors and assigns.

         Section 8.7 Severability. Any term or provision of this Agreement which
is invalid or unenforceable in any jurisdiction shall, as to that jurisdiction,
be ineffective to the extent of such invalidity or unenforceability without
rendering invalid or unenforceable the remaining terms and provisions of this
Agreement in any other jurisdiction. If any provision of this Agreement is so
broad as to be unenforceable, such provision shall be interpreted to be only so
broad as is enforceable.

         Section 8.8 Enforcement of Agreement. The parties hereto agree that
money damages or other remedy at law would not be sufficient or adequate remedy
for any breach or violation of, or a default under, this Agreement by them and
that in addition to all other remedies available to them, each of them shall be
entitled to the fullest extent permitted by Law to an injunction restraining
such breach, violation or default or threatened breach, violation or default and
to any other equitable relief, including, without limitation, specific
performance, without bond or other security being required.

         Section 8.9 Entire Agreement; No Third-Party Beneficiaries. This
Agreement and the Confidentiality Agreement constitute the entire agreement, and
supersede all other prior agreements and understandings, both written and oral,
between the parties, or any of them, with respect to the subject matter hereof
and thereof and, except for the provisions of Section 5.5(f) (with respect only
to those individuals listed in Section 5.18(a) of the Cyprus Disclosure
Schedule) and Section 5.11 hereof, is not intended to and shall not confer upon
any person other than the parties hereto any rights or remedies hereunder;
provided that if the Cyprus Merger has not been consummated before the 120th day
following the acceptance for payment of shares under the Cyprus Offer, as of
such 120th day, each of the shareholders of Cyprus (other than Parent and SubC)
shall have the right to enforce the obligations of Parent and SubC to consummate
the Cyprus Merger and the shareholders' right to receive the Merger
Consideration.

         Section 8.10 Headings. Headings of the Articles and Sections of this
Agreement are for convenience of the parties only, and shall be given no
substantive or interpretive effect whatsoever.

         Section 8.11 Definitions. References in this Agreement to
"Subsidiaries" of any person shall mean any corporation or other form of legal
entity of which more than 50% of the outstanding voting securities are on the
date hereof directly or indirectly owned by such person. References in this
Agreement to "Significant Subsidiaries" shall mean Subsidiaries which constitute
"significant subsidiaries" under Rule 405 promulgated by the SEC under the
Securities Act. References in this Agreement (except as specifically otherwise
defined) to "affiliates" shall mean, as to any person, any other person which,
directly or indirectly, controls, or is controlled by, or is under common
control with, such person. As used in this definition, "control"

                                       47

<PAGE>   56
(including, with its correlative meanings, "controlled by" and "under common
control with") shall mean the possession, directly or indirectly, of the power
to direct or cause the direction of management or policies of a person, whether
through the ownership of securities or partnership of other ownership interests,
by contract or otherwise. References in the Agreement to "person" shall mean an
individual, a corporation, a partnership, an association, a trust or any other
entity or organization, including, without limitation, a governmental body or
authority. Notwithstanding the foregoing, Parent shall not be deemed to be an
"affiliate" or a "Subsidiary" of Cyprus.

         Section 8.12 Finders or Brokers. Except for Merrill Lynch & Co. with
respect to Cyprus, a copy of whose engagement agreement has been or will be
provided to Parent, neither Cyprus nor any of their respective Subsidiaries has
employed any investment banker, broker, finder or intermediary in connection
with the transactions contemplated hereby who might be entitled to any fee or
any commission in connection with or upon consummation of the Cyprus Merger.

         Section 8.13 Cyprus Actions Following the Offer. Following the purchase
of Cyprus Common Stock pursuant to the Cyprus Offer, no action may be taken by
Cyprus under this Agreement (including, without limitation, termination pursuant
to Section 7.1 and any waiver and any extension under Section 7.7) unless any
such action is approved by the vote of the majority of the Continuing Directors
of Cyprus.


                                       48

<PAGE>   57
         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and delivered as of the date first above written.


                                       PHELPS DODGE CORPORATION

                                       By:  /s/ Douglas C. Yearley
                                            ------------------------------------
                                            Title:  Chairman and Chief
                                                     Executive Officer


                                       CAV CORPORATION

                                       By:  /s/ Ramiro G. Peru
                                            ------------------------------------
                                            Title: Vice President and Treasurer


                                       CYPRUS AMAX MINERALS COMPANY

                                       By:  /s/ Milton H. Ward
                                            ------------------------------------
                                            Title: President and Chief
                                                    Executive Officer




<PAGE>   58
                                                                         ANNEX A

                         Conditions to the Cyprus Offer

         Notwithstanding any other provision of our Offer, we shall not be
required to accept for exchange or exchange any Cyprus Amax Common Stock, may
postpone the acceptance for exchange of or exchange for tendered Cyprus Amax
Common Stock, and may, in our sole discretion, terminate or amend the Offer as
to any Cyprus Amax Common Stock not then exchanged (a) if at the expiration
date, any of the Minimum Tender Condition or the Phelps Dodge Stockholder
Approval Condition (each as defined in the Prospectus dated September 22, 1999
relating to the Offer by Phelps Dodge for shares of Cyprus Amax Common Stock)
has not been satisfied or (b) if on or after the date of the prospectus and at
or prior to the expiration date, any of our other conditions are not satisfied.
The conditions are as follows:

              (a) The shares of our common stock which shall be issued to Cyprus
         Amax stockholders in the Offer and the Phelps Dodge/Cyprus Amax merger
         have been authorized for listing on the NYSE, subject to official
         notice of issuance;

              (b) Registration Statement No. 333-86061 and any post-effective
         amendments thereto shall be effective under the Securities Act, and no
         stop order suspending the effectiveness of the Registration Statement
         shall have been issued nor shall there have been proceedings for that
         purpose initiated or threatened by the SEC and we shall have received
         all necessary state securities law or "blue sky" authorizations;

              (c) No temporary restraining order, preliminary or permanent
         injunction or other order or decree issued by any court or agency of
         competent jurisdiction or other legal restraint or prohibition
         preventing the consummation of the Offer or any of the other
         transactions contemplated by the Prospectus dated September 22, 1999
         (the "Prospectus") shall be in effect; no statute, rule, regulation,
         order, injunction or decree shall have been enacted, entered,
         promulgated or enforced by any court, administrative agency or
         commission or other governmental authority or instrumentality which
         prohibits, or makes illegal the consummation of our Offer; nor shall
         there have been a failure to obtain any required consent or approval
         under foreign laws or regulations which would prohibit the consummation
         of the Offer or would have a material adverse effect on Parent or on
         Cyprus Amax;

              (d) There shall not have been after the date of this Agreement any
         (i) amendment of the Code, (ii) amendment or adoption of final or
         temporary Treasury Regulations under the Code, (iii) Internal Revenue
         Service revenue ruling, revenue procedures, technical advice memorandum
         or notices, or (iv) final decision of a court of competent
         jurisdiction, in each case that would be


                                       A-1

<PAGE>   59
         inconsistent with the Cyprus Merger qualifying as a reorganization
         under Section 368(a) of the Code; and

              (e) The representations and warranties of Cyprus in this Agreement
         shall be true and correct (without giving effect to any qualification
         as to "materiality" or "Material Adverse Effect" set forth therein) as
         of the date of the Prospectus and as of the expiration date as though
         made on and as of the date of the Prospectus and the expiration date
         except where the failure of such representations and warranties to be
         so true and correct would not reasonably be expected to have,
         individually or in the aggregate a Material Adverse Effect (as defined
         therein) on Cyprus; and Cyprus shall have performed or complied in all
         material respects with all the material agreements and covenants
         required by this Agreement.

         The foregoing conditions are solely for our benefit and we may assert
them regardless of the circumstances giving rise to any such conditions
(including any action or inaction by us). We may waive these conditions in whole
or in part (other than the Phelps Dodge Stockholder Approval Condition and the
condition relating to effectiveness of the Registration Statement). The
determination as to whether any condition has been satisfied shall be deemed a
continuing right which may be asserted at any time and from time to time.
Notwithstanding the fact that we reserve the right to assert the failure of a
condition following acceptance for exchange but prior to exchange in order to
delay exchange or cancel its obligation to exchange properly tendered Cyprus
Amax Common Stock, we will either promptly exchange such Cyprus Common Stock or
promptly return such Cyprus Common Stock.


                                       A-2

<PAGE>   1

                                                                      EXHIBIT 28

                                                              September 30, 1999

Board of Directors
Cyprus Amax Minerals Company
9100 East Mineral Circle
Englewood, CO 80112

Members of the Board of Directors:

     Cyprus Amax Minerals Company (the "Company"), Phelps Dodge Corporation (the
"Acquiror") and CAV Corporation, a newly formed, wholly owned subsidiary of the
Acquiror (the "Acquisition Sub"), propose to enter into the Agreement and Plan
of Merger among Phelps Dodge Corporation, CAV Corporation and Cyprus Amax
Minerals Company (the "Agreement") pursuant to which (i) the Acquisition Sub
would commence an exchange offer (the "Offer") for all outstanding shares of
common stock, no par value, of the Company (the "Company Shares") for either, at
the election of the stockholder, (x) 0.3500 of a share of common stock, $6.25
par value, of the Acquiror (the "Acquiror Shares") or (y) $20.54 per share, net
to the seller in cash, without interest, each subject to the election and
proration provisions of the Agreement (the "Offer Consideration") and (ii) the
Acquisition Sub would be merged with the Company in a merger (the "Merger") in
which each Company Share not acquired in the Offer, other than Company Shares
held by the Acquiror, the Company or their respective subsidiaries, would be
converted into 0.2203 of an Acquiror Share and $7.61 in cash, without interest
(the "Merger Consideration" and together with the Offer Consideration, the
"Consideration"), subject to the proration provisions of the Agreement. The
Offer and the Merger, taken together, are referred to as the "Transaction".

     You have asked us whether, in our opinion, the Consideration is fair from a
financial point of view to the stockholders of the Company.

     In arriving at the opinion set forth below, we have, among other things:

     (1)  Reviewed certain publicly available business and financial information
relating to the Company and the Acquiror that we deemed to be relevant;

     (2)  Reviewed publicly available analysts' forecasts with respect to the
Acquiror;

     (3)  Reviewed certain information, including financial forecasts, relating
to the business, earnings, cash flow, assets, liabilities and prospects of the
Company, as well as the amount and timing of the cost savings and related
expenses and synergies expected to result from the Transaction (the "Expected
Synergies") furnished to us by the Company;

     (4)  Conducted discussions with members of senior management and
representatives of the Company concerning the matters described in clauses 1, 2
and 3 above, as well as their business and prospects before and after giving
effect to the Transaction and the Expected Synergies;

     (5)  Reviewed the market prices and valuation multiples for the Company
Shares and the Acquiror Shares and compared them with those of certain publicly
traded companies that we deemed to be relevant;

     (6)  Reviewed the results of operations of the Company and the Acquiror and
compared them with those of certain publicly traded companies that we deemed to
be relevant;

     (7)  Reviewed the terms of the Acquiror's exchange offer for ASARCO
Incorporated set forth in Amendment No. 1 to the Schedule 14D-1 filed September
22, 1999;

     (8)  Participated in certain discussions and negotiations among
representatives of the Company and the Acquiror and their financial and legal
advisors;

     (9)  Reviewed the potential pro forma impact of the Transaction;

     (10) Reviewed a draft dated September 29, 1999 of the Agreement; and

     (11) Reviewed such other financial studies and analyses and took into
account such other matters as we deemed necessary, including our assessment of
general economic, market and monetary conditions.
<PAGE>   2

     In preparing our opinion, we have assumed and relied on the accuracy and
completeness of all information supplied or otherwise made available to us,
discussed with or reviewed by or for us, or publicly available, and we have not
assumed any responsibility for independently verifying such information or
undertaken an independent evaluation or appraisal of any of the assets or
liabilities of the Company or the Acquiror or been furnished with any such
evaluation or appraisal. In addition, we have not assumed any obligation to
conduct any physical inspection of the properties or facilities of the Company
or the Acquiror. With respect to the financial forecast information and the
Expected Synergies furnished to or discussed with us by the Company, we have
assumed that they have been reasonably prepared and reflect the best currently
available estimates and judgment of the Company's management as to the expected
future financial performance of the Company and the Expected Synergies. In
preparing our opinion we were not provided with financial forecasts with respect
to the Acquiror other than certain publicly available analysts' earnings
forecasts which we discussed with the Company's management and on which we
relied. With respect to the financial forecast information contained in such
publicly available analysts' forecasts, we have assumed that they reflect the
best currently available estimates as to the future financial performance of the
Acquiror. We have further assumed that the Transaction will qualify as a
tax-free reorganization for U.S. federal income tax purposes. We have also
assumed that the final form of the Agreement will be substantially similar to
the last draft reviewed by us.

     Our opinion is necessarily based upon market, economic and other conditions
as they exist and can be evaluated on, and on the information made available to
us as of, the date hereof. We have assumed that in the course of obtaining the
necessary regulatory or other consents or approvals (contractual or otherwise)
for the Transaction, no restrictions, including any divestiture requirements or
amendments or modifications, will be imposed that will have a material adverse
effect on the contemplated benefits of the Transaction.

     We are acting as financial advisor to the Company in connection with the
Transaction and will receive a fee from the Company for our services, a
significant portion of which is contingent upon the consummation of the
Transaction. In addition, the Company has agreed to indemnify us for certain
liabilities arising out of our engagement. We have, in the past, provided
financial advisory and financing services to the Company and/or its affiliates
and may continue to do so and have received, and may receive, fees for the
rendering of such services. In addition, in the ordinary course of our business,
we may actively trade the Company Shares and other securities of the Company, as
well as the Acquiror Shares and other securities of the Acquiror, for our own
account and for the accounts of customers and, accordingly, may at any time hold
a long or short position in such securities.

     This opinion is for the use and benefit of the Board of Directors of the
Company. Our opinion does not address the merits of the underlying decision by
the Company to engage in the Transaction and does not constitute a
recommendation to any stockholder of the Company as to how such stockholder
should vote on the proposed Transaction or any matter related thereto.

     We are not expressing any opinion herein as to the prices at which the
Company Shares will trade following the announcement or consummation of the
Transaction.

     On the basis of and subject to the foregoing, we are of the opinion that,
as of the date hereof, the Consideration is fair from a financial point of view
to the stockholders of the Company.

                                          Very truly yours,

                                          MERRILL LYNCH, PIERCE, FENNER & SMITH
                                          INCORPORATED

                                        2


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission