EAGLE GEOPHYSICAL INC
8-A12G, 1998-08-25
OIL & GAS FIELD EXPLORATION SERVICES
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

                                    FORM 8-A

                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

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

                             EAGLE GEOPHYSICAL, INC.
             (Exact name of registrant as specified in its charter)



         DELAWARE                                     76-0522659
     (State or other                             (I.R.S. Employer
     jurisdiction of                             Identification No.)
      incorporation)                        
                                           


                              50 BRIAR HOLLOW LANE
                                 6TH FLOOR WEST
                              HOUSTON, TEXAS 77027
                    (Address of principal executive offices)

        Securities to be registered pursuant to Section 12(b)of the Act:

    Title of each class                      Name of each exchange on which
    to be so registered                      each class is to be registered
    -------------------                      ------------------------------


         If this form relates to the registration of a class of securities
pursuant to Section 12(b) of the Exchange Act and is effective pursuant to
General Instruction A.(c), check the following box. [ X ]

         If this form relates to the registration of a class of securities
pursuant to Section 12(g) of the Exchange Act and is effective pursuant to
General Instruction A.(d), check the following box. [ ]

         Securities Act registration statement file number to which this form
relates: ___________ (if applicable)

        Securities to be registered pursuant to Section 12(g)of the Act:

                                 Title of Class
                                 --------------

            Rights to Purchase Junior Participating Preferred Stock,
                            $0.01 Par Value Per Share






<PAGE>   2




Item 1.  Description of Registrant's Securities to be Registered.

        On August 4, 1998, the Board of Directors of Eagle Geophysical, Inc.
(the "Company") declared a dividend of one preferred share purchase right (a
"Right") for each outstanding share of common stock, par value $.01 per share
(the "Common Stock"), of the Company. The dividend is payable on August 31, 1998
(the "Record Date"), to the stockholders of record on that date. Each Right
entitles the registered holder to purchase from the Company one one-thousandth
of a share of Series A Junior Participating Preferred Stock, $.01 par value per
share (the "Series A Preferred Stock"), of the Company at a price of $46 per one
one-thousandth of a share of Series A Preferred Stock (the "Purchase Price"),
subject to adjustment. The complete description and terms of the Rights are set
forth in a Rights Agreement dated as of August 24, 1998, as the same may be
amended from time to time (the "Rights Agreement"), between the Company and
ChaseMellon Shareholder Services, L.L.C., as Rights Agent (the "Rights Agent").
The following description of the Rights Agreement is a summary of the material
terms thereof and is qualified in its entirety by reference to the complete text
of the Rights Agreement.

        Upon distribution, the Rights will be attached to all outstanding shares
of Common Stock and will be represented by the certificates representing such
shares. No separate certificates evidencing the Rights (the "Rights
Certificates") will be distributed prior to the Distribution Date (as defined
below). The Rights will separate from the Common Stock and a "Distribution Date"
will occur upon the earlier of (i) 10 business days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") has acquired, or obtained the right to acquire, beneficial
ownership of 15% or more of the outstanding shares of Common Stock (the "Stock
Acquisition Date"), or (ii) 10 business days (or such later date as the Board of
Directors shall determine) following the commencement of a tender or exchange
offer that would result in a person or group beneficially owning 15% or more of
such outstanding shares of Common Stock (the "Tender Offer Date"). The term
"Acquiring Person" is defined in the Rights Agreement to exclude Seitel, Inc.,
together with its executive officers and directors, for so long as they are the
beneficial owner of no more than 18% of the outstanding shares of Common Stock.
Until the Distribution Date, (i) the Rights will be evidenced by the Common
Stock certificates and will be transferred with and only with such Common Stock
certificates, (ii) Common Stock certificates will contain a notation
incorporating the Rights Agreement by reference, and (iii) the surrender for
transfer of any certificates for Common Stock outstanding will also constitute
the transfer of the Rights associated with the Common Stock represented by such
certificates. Pursuant to the Rights Agreement, the Company reserves the right
to require prior to the occurrence of a Triggering Event (as defined below)
that, upon any exercise of Rights, a number of Rights be exercised so that only
whole shares of Series A Preferred Stock will be issued (or fractions that are
integral multiples of one one-thousandth of a share).

        The Rights are not exercisable until the Distribution Date and will
expire at the close of business on August 4, 2008, or such later date as the
Board of Directors establishes under certain circumstances, unless earlier
redeemed by the Company as described below.

        As soon as practicable after the Distribution Date, Rights Certificates
will be mailed to holders of record of Common Stock as of the close of business
on the Distribution Date and, thereafter, the separate Rights Certificates alone
will represent the Rights. Except as otherwise determined by the Board of
Directors, only shares of Common Stock outstanding prior to the Distribution
Date will be issued with Rights.



                                        1

<PAGE>   3




        Each share of Series A Preferred Stock purchased upon exercise of the
Rights will be entitled to a minimum preferential quarterly dividend payment
equal to the greater of (i) $1.00 per share, and (ii) 1,000 times the dividend,
if any, declared per share of Common Stock. In the event of liquidation, the
holders of the Series A Preferred Stock will be entitled to a minimum
preferential liquidation payment equal to 1,000 times the par value per share
plus an amount equal to accrued and unpaid dividends and distributions to the
date of such payment. Each share of Series A Preferred Stock will have 1,000
votes and will vote together with the Common Stock. In the event of any merger,
consolidation or other transaction in which shares of Common Stock are
exchanged, each share of Series A Preferred Stock will be entitled to receive
1,000 times the amount per share of Common Stock received in such merger,
consolidation or other transaction. These rights are protected by customary
antidilution provisions. The shares of Series A Preferred Stock will, if issued,
be junior to any other series of Preferred Stock which may be authorized and
issued by the Company, unless the terms of any such other series provide
otherwise. Because of the nature of the Series A Preferred Stock's dividend,
liquidation and voting rights, the value of one one-thousandth of a share of
Series A Preferred Stock purchasable upon the exercise of each Right should
approximate the value of one share of Common Stock.

        In the event that any Person becomes the beneficial owner of 15% or more
of the then outstanding shares of Common Stock (unless such acquisition is made
pursuant to a tender or exchange offer for all outstanding shares of Common
Stock, upon terms and conditions determined by a majority of the directors to be
in the best interests of the Company and its stockholders (a "Qualifying
Offer")), each holder of a Right (other than an Acquiring Person, certain
related parties and transferees) will thereafter have the right to receive, upon
exercise, Common Stock (or, in certain circumstances, cash, property or other
securities of the Company), having a value equal to two times the exercise price
of the Right. For example, at an exercise price of $46 per Right, each Right not
owned by an Acquiring Person (or by certain related parties or transferees)
following the event set forth above would entitle its holder to purchase $92
worth of Common Stock (or other consideration, as noted above) for $46. Assuming
that the Common Stock had a per share market price of $30 at such time, the
holder of each valid Right would be entitled to purchase 3.06 shares of Common
Stock for $46. The Rights are not exercisable following the occurrence of any of
the events described above until such time as the Rights are no longer
redeemable by the Company as described below. Notwithstanding any of the
foregoing, following the occurrence of any of the events set forth in this
paragraph, all Rights that are, or (under certain circumstances specified in the
Rights Agreement) were, beneficially owned by any Acquiring Person will be null
and void.

        In the event that at any time following the Stock Acquisition Date, (i)
the Company is acquired in a merger or business combination transaction in which
it is not the surviving corporation (other than a merger consummated pursuant to
a Qualifying Offer); (ii) the Company is the surviving corporation in a business
combination transaction (other than such a transaction consummated pursuant to a
Qualifying Offer) but all or part of the outstanding shares of Common Stock are
changed or exchanged for stock or other securities of any person or cash or any
other property; or (iii) more than 50% of the combined assets or earning power
is sold or transferred (in each case other than certain consolidations with,
mergers with and into, or sales of assets or earning power by or to subsidiaries
of the Company as specified in the Rights Agreement), each holder of a Right
(except Rights which have previously been voided as set forth above) shall
thereafter have the right to receive, upon exercise thereof, common stock of the
acquiring company having a value equal to two times the exercise price of the
Right. The events described in this paragraph and in the preceding paragraph are
referred to as the "Triggering Events."



                                        2

<PAGE>   4




        In order to prevent dilution, the Purchase Price payable, the number and
kind of shares covered by each Right and the number of Rights outstanding are
subject to adjustment from time to time (x) in the event of a stock dividend on,
or a subdivision, combination or reclassification of, the Series A Preferred
Stock, (y) if holders of the Series A Preferred Stock are granted certain rights
or warrants to subscribe for Series A Preferred Stock or securities convertible
into Series A Preferred Stock at less than the current market price of the
Series A Preferred Stock, or (z) upon the distribution to holders of the Series
A Preferred Stock of evidences of indebtedness, cash (excluding regular
quarterly cash dividends), assets (other than dividends payable in Series A
Preferred Stock) or subscription rights or warrants (other than those referred
to in clause (y) above).

        With certain exceptions, no adjustments in the Purchase Price will be
required until cumulative adjustments amount to at least 1% of the Purchase
Price. No fractional shares of Series A Preferred Stock are required to be
issued (other than fractions which are integral multiples of one one-thousandth
of a share of Series A Preferred Stock) and, in lieu thereof, the Company may
make an adjustment in cash based on the market price of the Series A Preferred
Stock on the trading day prior to the date of exercise.

        At any time until ten business days following the Stock Acquisition
Date, the Company may redeem the Rights in whole, but not in part, at a price of
$.001 per Right (payable in cash, shares of Common Stock or other consideration
deemed appropriate by the Board of Directors). The redemption of the Rights may
be made effective at such time on such basis with such conditions as the Board
of Directors in its sole discretion may establish. Immediately upon any
redemption of the Rights, the right to exercise the Rights will terminate and
the only right of the holders of Rights will be to receive the $.001 redemption
price.

        Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.

        Any of the provisions of the Rights Agreement may be amended by the
Board of Directors of the Company prior to the Distribution Date, other than the
redemption price and the number of one one-thousandths of a share of Series A
Preferred Stock for which a right is exercisable, and the Purchase Price may not
be reduced. After the Distribution Date, the provisions of the Rights Agreement
may be amended by the Board in order to cure any ambiguity, to make changes
which do not adversely affect the interests of holders of Rights or to shorten
or lengthen any time period under the Rights Agreement, except that no amendment
to adjust the time period governing redemption may be made at such time as the
Rights are not redeemable. The Final Expiration Date (as defined in the Rights
Agreement) may be changed and the Purchase Price may be increased at any time
prior to a Stock Acquisition Date or a Tender Offer Date.

        THIS SUMMARY DESCRIPTION OF THE RIGHTS DOES NOT PURPORT TO BE COMPLETE
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO THE RIGHTS AGREEMENT, FORM OF
CERTIFICATE OF DESIGNATIONS OF JUNIOR PARTICIPATING PREFERRED STOCK, FORM OF
RIGHT CERTIFICATE AND THE FORM OF THE SUMMARY OF RIGHTS, ALL FILED AS EXHIBITS
HERETO AND INCORPORATED BY REFERENCE HEREIN.



                                        3

<PAGE>   5




Item 2.  Exhibits.

         1.       Rights Agreement dated as of August 24, 1998 by and between
                  the Company and ChaseMellon Shareholder Services, L.L.C. as
                  Rights Agent, including Certificate of Designations of Junior
                  Participating Preferred Stock as Exhibit A, the form of Rights
                  Certificate as Exhibit B and the Summary of Rights to Purchase
                  Preferred Shares as Exhibit C.

         2.       Form of Certificate of Designations of Junior Participating
                  Preferred Stock (Exhibit A to the Rights Agreement)

         3.       Form of Rights Certificate (Exhibit B to the Rights 
                  Agreement).

         4.       Form of Summary of Rights to Purchase Preferred Shares
                  (Exhibit C to the Rights Agreement).





                                        4

<PAGE>   6




                                    SIGNATURE

     Pursuant to the requirements of Section 12 of the Securities Exchange Act
of 1934, the Registrant has duly caused this registration statement to be signed
on its behalf by the undersigned, thereto duly authorized.

                                        EAGLE GEOPHYSICAL, INC.



Date: August 24, 1998                   By: /s/ RICHARD W. MCNAIRY
                                           ---------------------------
                                            Richard W. McNairy, Vice President







                                        5

<PAGE>   7

                               INDEX TO EXHIBITS


       EXHIBIT
       NUMBER                     DESCRIPTION
       ------                     -----------


         1.       Rights Agreement dated as of August 24, 1998 by and between
                  the Company and ChaseMellon Shareholder Services, L.L.C. as
                  Rights Agent, including Certificate of Designation of Junior
                  Participating Preferred Stock as Exhibit A, the form of Rights
                  Certificate as Exhibit B and the Summary of Rights to Purchase
                  Preferred Shares as Exhibit C.

         2.       Form of Certificate of Designations of Junior Participating
                  Preferred Stock (Exhibit A to the Rights Agreement)

         3.       Form of Rights Certificate (Exhibit B to the Rights 
                  Agreement).

         4.       Form of Summary of Rights to Purchase Preferred Shares
                  (Exhibit C to the Rights Agreement).

<PAGE>   1


                                                                       EXHIBIT 1





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


                             EAGLE GEOPHYSICAL, INC.
                                       and
                    CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
                                  Rights Agent

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


                                Rights Agreement

                           Dated as of August 24, 1998


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




                                   

<PAGE>   2




                                TABLE OF CONTENTS
<TABLE>
<CAPTION>

          SECTION                                                                                               PAGE
         ----------                                                                                             ----
         <S>               <C>                                                                                   <C>
         Section 1.        Certain Definitions....................................................................1

         Section 2.        Appointment of Rights Agent............................................................4

         Section 3.        Issue of Rights Certificates...........................................................4

         Section 4.        Form of Rights Certificates............................................................5

         Section 5.        Countersignature and Registration......................................................6

         Section 6.        Transfer, Split Up, Combination and Exchange of Rights Certificates;

                           Mutilated, Destroyed, Lost or Stolen Rights Certificates...............................7

         Section 7.        Exercise of Rights, Purchase Price; Expiration Date of Rights..........................8
                           
         Section 8.        Cancellation and Destruction of Rights Certificates....................................9

         Section 9.        Reservation and Availability of Capital Stock.........................................10

         Section 10.       Preferred Stock Record Date...........................................................11

         Section 11.       Adjustment of Purchase Price, Number and Kind of Shares or

                           Number of Rights......................................................................12

         Section 12.       Certificate of Adjusted Purchase Price or Number of Shares............................19
                           
         Section 13.       Consolidation, Merger or Sale or Transfer of Assets or

                           Earning Power.........................................................................20

         Section 14.       Fractional Rights and Fractional Shares...............................................22

         Section 15.       Rights of Action......................................................................23

         Section 16.       Agreement of Rights Holders...........................................................23

         Section 17.       Rights Certificate Holder Not Deemed a Stockholder....................................24

         Section 18.       Concerning the Rights Agent...........................................................24
</TABLE>

                                       -i-

<PAGE>   3




<TABLE>

         <S>               <C>                                                                                   <C>
         Section 19.       Merger or Consolidation or Change of Name of Rights...................................25

         Section 20.       Duties of Rights Agent................................................................26

         Section 21.       Change of Rights Agent................................................................27

         Section 22.       Issuance of New Rights Certificates...................................................28

         Section 23.       Redemption and Termination............................................................29

         Section 24.       Notice of Certain Events..............................................................29

         Section 25.       Notices...............................................................................30

         Section 26.       Supplements and Amendments............................................................31

         Section 27.       Successors............................................................................31

         Section 28.       Determinations and Actions by the Board of Directors, etc.............................32

         Section 29.       Benefits of this Agreement............................................................32

         Section 30.       Severability..........................................................................32

         Section 31.       Governing Law.........................................................................32

         Section 32.       Counterparts..........................................................................33

         Section 33.       Descriptive Headings..................................................................33
</TABLE>


Exhibit A      Certificate of Designations of Rights, Preferences and Privileges

Exhibit B      Form of Rights Certificate

Exhibit C      Summary of Rights

                                      -ii-

<PAGE>   4





                                RIGHTS AGREEMENT

        RIGHTS AGREEMENT, dated as of August 24, 1998 (the "Agreement"), between
Eagle Geophysical, Inc., a Delaware corporation (the "Company"), and ChaseMellon
Shareholder Services, L.L.C., a limited liability company organized under the
laws of the State of New Jersey (the "Rights Agent").

                                   WITNESSETH

        WHEREAS, on August 4, 1998, the Board of Directors of the Company
authorized the distribution of one Right for each share of common stock, $.01
par value per share, of the Company (the "Common Stock") outstanding at the
close of business on August 31,1998 (the "Record Date"), each Right initially
representing the right to purchase one one-thousandth of a share of Series A
Junior Participating Preferred Stock of the Company having the rights, powers
and preferences set forth in the Certificate of Designation, Preferences and
Rights of Series A Junior Participating Preferred Stock filed on August 24,
1998, in the office of the Secretary of State of the State of Delaware, upon the
terms and subject to the conditions hereinafter set forth (the "Rights");

        NOW, THEREFORE, in consideration of the premises and the mutual
agreements herein set forth, the parties hereby agree as follows:

        Section 1. Certain Definitions. For purposes of this Agreement, the
following terms have the meanings indicated:

                (a) "Acquiring Person" shall mean any Person who or which,
together with all Affiliates and Associates of such Person, shall be the
Beneficial Owner of 15% or more of the shares of Common Stock then outstanding,
but shall not include (i) the Company, (ii) any Subsidiary of the Company, (iii)
any employee benefit plan of the Company or of any Subsidiary of the Company, or
any Person or entity organized, appointed or established by the Company for or
pursuant to the terms of any such plan, (iv) any Person who becomes an Acquiring
Person solely as a result of a reduction in the number of shares of Common Stock
outstanding due to the repurchase of shares of Common Stock by the Company,
unless and until such Person shall purchase or otherwise become the Beneficial
Owner of additional shares of Common Stock constituting 1% or more of the then
outstanding shares of Common Stock, or (v) Seitel, Inc., a Delaware corporation,
together with its executive officers and directors, for so long as they are the
Beneficial Owner of no more than 18% of the shares of Common Stock of the
Company then outstanding. Notwithstanding the foregoing, if the Board of
Directors of the Company determines in good faith that a Person who would
otherwise be an Acquiring Person has become such inadvertently, and such Person
divests as promptly as practicable a sufficient number of shares of Common Stock
so that such Person would no longer be an Acquiring Person, then such Person
shall not be deemed to be an Acquiring Person for any purposes of this
Agreement.


                                       -1-

<PAGE>   5




                (b) "Affiliate" and "Associate" shall have the respective
meanings ascribed to such terms in Rule 12b-2 of the General Rules and
Regulations under the Securities Exchange Act of 1934, as amended and in effect
on the date of this Agreement (the "Exchange Act").

                (c) A Person shall be deemed the "Beneficial Owner" of, and
shall be deemed to "beneficially own," any securities:

                           (i)  which such Person or any of such Person's
          Affiliates or Associates, directly or indirectly, has the right to
          acquire (whether such right is exercisable immediately or only after
          the passage of time) pursuant to any agreement, arrangement or
          understanding (whether or not in writing) or upon the exercise of
          conversion rights, exchange rights, rights, warrants or options, or
          otherwise; provided, however, that a Person shall not be deemed the
          "Beneficial Owner" of, or to "beneficially own," (A) securities
          tendered pursuant to a tender or exchange offer made by such Person or
          any of such Person's Affiliates or Associates until such tendered
          securities are accepted for purchase or exchange, or (B) securities
          issuable upon exercise of Rights at any time prior to the occurrence
          of a Triggering Event, or (C) securities issuable upon exercise of
          Rights from and after the occurrence of a Triggering Event which
          Rights were acquired by such Person or any of such Person's Affiliates
          or Associates prior to the Distribution Date or pursuant to Section
          3(a) or Section 22, hereof (the "Original Rights") or pursuant to
          Section 11(i) hereof in connection with an adjustment made with
          respect to any Original Rights;

                           (ii) which such Person or any of such Person's
          Affiliates or Associates, directly or indirectly, has the right to
          vote or dispose of or has "beneficial ownership" of (as determined
          pursuant to Rule 13d-3 of the General Rules and Regulations under the
          Exchange Act), including pursuant to any agreement, arrangement or
          understanding, whether or not in writing; provided, however, that a
          Person shall not be deemed the "Beneficial Owner" of, or to
          "beneficially own," any security under this subparagraph (ii) as a
          result of an agreement, arrangement or understanding to vote such
          security if such agreement, arrangement or understanding: (A) arises
          solely from a revocable proxy given in response to a public proxy or
          consent solicitation made pursuant to, and in accordance with, the
          applicable provisions of the General Rules and Regulations under the
          Exchange Act, and (B) is not also then reportable by such Person on
          Schedule 13D under the Exchange Act (or any comparable or successor
          report), or

                           (iii) which are beneficially owned, directly or
          indirectly, by any other Person (or any Affiliate or Associate
          thereof) with which such Person (or any of such Person's Affiliates or
          Associates) has any agreement, arrangement or understanding (whether
          or not in writing), for the purpose of acquiring, holding, voting
          (except pursuant to a revocable proxy as described in the proviso to
          subparagraph (ii) of this paragraph (c)) or disposing of any voting
          securities of the Company; provided, however, that nothing in this
          paragraph (c) shall cause a

                                       -2-

<PAGE>   6




         Person engaged in the business as an underwriter of securities to be
         deemed the "Beneficial Owner" of, or to "beneficially own," any
         securities acquired through such Person's participation in good faith
         in a firm commitment underwriting until the expiration of forty (40)
         days after the date of such acquisition.

                (d) "Business Day" shall mean any day other than a Saturday,
Sunday or a day on which banking institutions in the State of New York are
authorized or obligated by law or executive order to close.

                (e) "Close of business" on any given date shall mean 5:00 P.M.,
New York City time, on such date; provided, however, that if such date is not a
Business Day it shall mean 5:00 P.M., New York City time, on the next succeeding
Business Day.

                (f) "Common Stock" shall mean the common stock, par value $.01
per share, of the Company, except that "Common Stock" when used with reference
to any Person other than the Company shall mean the capital stock of such Person
with the greatest voting power, or the equity securities or other equity
interest having power to control or direct the management, of such Person.

                (g) "Person" shall mean any individual, firm, corporation,
partnership or other entity.

                (h) "Preferred Stock" shall mean shares of Series A Junior
Participating Preferred Stock, par value $.01 per share, of the Company and, to
the extent that there are not a sufficient number of shares of Series A Junior
Participating Preferred Stock authorized to permit the full exercise of the
Rights, any other series of preferred stock, par value $.01 per share, of the
Company designated for such purpose containing terms substantially similar to
the terms of the Series A Junior Participating Preferred Stock.

                (i) "Section 11(a)(ii) Event" shall mean the event described in
Section 11(a)(ii) hereof.

                (j) "Section 13 Event" shall mean any event described in clauses
(x), (y) or (z) of Section 13(a) hereof.

                (k) "Stock Acquisition Date" shall mean the first date of public
announcement (which, for purposes of this definition, shall include, without
limitation, a report filed pursuant to Section 13(d) under the Exchange Act) by
the Company or an Acquiring Person that an Acquiring Person has become such.

                (l) "Subsidiary" shall mean, with reference to any Person, any
corporation of which an amount of voting securities sufficient to elect at least
a majority of the directors of such corporation is beneficially owned, directly
or indirectly, by such Person, or otherwise controlled by such Person.


                                       -3-

<PAGE>   7




                (m) "Triggering Event" shall mean the Section 11(a)(ii) Event or
any Section 13 Event.

        Section 2. Appointment of Rights Agent. The Company hereby appoints the
Rights Agent to act as agent for the Company in accordance with the terms and
conditions hereof, and the Rights Agent hereby accepts such appointment. The
Company may from time to time appoint such Co-Rights Agents as it may deem
necessary or desirable.

        Section 3. Issue of Rights Certificates.

                (a) Until the earlier of (i) the close of business on the tenth
Business Day after the Stock Acquisition Date or (ii) the close of business on
the tenth Business Day (or such later date as the Board of Directors shall
determine) after the date that a tender or exchange offer by any Person (other
than the Company, any Subsidiary of the Company, any employee benefit plan of
the Company or of any Subsidiary of the Company, or any Person or entity
organized, appointed or established by the Company for or pursuant to the terms
of any such plan) is first published or sent or given within the meaning of Rule
14d-2(a) of the General Rules and Regulations under the Exchange Act, if upon
consummation thereof, such Person would be the Beneficial Owner of 15% or more
of the shares of Common Stock then outstanding (the earlier of (i) and (ii)
being herein referred to as the "Distribution Date"), (x) the Rights will be
evidenced (subject to the provisions of paragraph (b) of this Section 3) by the
certificates for the Common Stock registered in the names of the holders of the
Common Stock (which certificates for Common Stock shall be deemed also to be
certificates for Rights) and not by separate certificates, and (y) the Rights
will be transferable only in connection with the transfer of the underlying
shares of Common Stock (including a transfer to the Company). As soon as
practicable after the Distribution Date, the Rights Agent will send by
first-class, insured, postage prepaid mail, to each record holder of the Common
Stock as of the close of business on the Distribution Date, at the address of
such holder shown on the records of the Company, one or more right certificates,
in substantially the form of Exhibit B hereto (the "Rights Certificates"),
evidencing one Right for each share of Common Stock so held, subject to
adjustment as provided herein. In the event that an adjustment in the number of
Rights per share of Common Stock has been made pursuant to Section 11(p) hereof,
at the time of distribution of the Rights Certificates, the Company shall make
the necessary and appropriate rounding adjustments (in accordance with Section
14(a) hereof) so that Rights Certificates representing only whole numbers of
Rights are distributed and cash is paid in lieu of any fractional Rights. As of
and after the Distribution Date, the Rights will be evidenced solely by such
Rights Certificates.

                (b) On the Record Date, or as soon as practicable thereafter,
the Company will send a copy of a Summary of Rights to Purchase Preferred
Shares, in substantially the form of Exhibit C hereto (the "Summary of Rights"),
by first-class, postage-prepaid mail, to each record holder of shares of Common
Stock as of the Close of Business on the Record Date, at the address of such
holder shown on the records of the Company. With respect to certificates for
shares of Common Stock outstanding as of the Record Date, until the Distribution
Date, the Rights will be evidenced by such certificates registered in the names
of the holders thereof together with a copy of the Summary of Rights. Until the
Distribution Date (or the earlier of the Redemption Date or

                                       -4-

<PAGE>   8




the Final Expiration Date), the surrender for transfer of any certificate for
shares of Common Stock outstanding on the Record Date, with or without a copy of
the Summary of Rights, shall also constitute the transfer of the Rights
associated with the shares of Common Stock represented thereby.

                (c) Rights shall be issued in respect of all shares of Common
Stock which are issued after the date of this Agreement but prior to the earlier
of the Distribution Date or the Expiration Date. Certificates representing such
shares of Common Stock shall also be deemed to be certificates for Rights, and
shall bear the following legend:

                    This certificate also evidences and entities the holder
                hereof to certain Rights as set forth in the Rights Agreement
                between Eagle Geophysical, Inc. and ChaseMellon Shareholder
                Services, L.L.C., dated as of August 24, 1998 (the "Rights
                Agreement"), the terms of which are hereby incorporated herein
                by reference and a copy of which is on file at the principal
                offices of Eagle Geophysical, Inc. Under certain circumstances,
                as set forth in the Rights Agreement, such Rights will be
                evidenced by separate certificates and will no longer be
                evidenced by this certificate. Eagle Geophysical, Inc. will mail
                to the holder of this certificate a copy of the Rights
                Agreement, as in effect on the date of mailing, without charge
                promptly after receipt of a written request therefor. Under
                certain circumstances set forth in the Rights Agreement, Rights
                issued to, or held by, any Person who is, was or becomes an
                Acquiring Person or any Affiliate or Associate thereof (as such
                terms are defined in the Rights Agreement), whether currently
                held by or on behalf of such Person or by any subsequent holder,
                may become null and void.

With respect to such certificates containing the foregoing legend, until the
earlier of (i) the Distribution Date or (ii) the Expiration Date, the Rights
associated with the Common Stock represented by such certificates shall be
evidenced by such certificates alone and registered holders of Common Stock
shall also be the registered holders of the associated Rights, and the transfer
of any of such certificates shall also constitute the transfer of the Rights
associated with the Common Stock represented by such certificates.

        Section 4. Form of Rights Certificates.

                (a) The Rights Certificates (and the forms of election to
purchase and of assignment to be printed on the reverse thereof) shall each be
substantially in the form set forth in Exhibit B hereto and may have such marks
of identification or designation and such legends, summaries or endorsements
printed thereon as the Company may deem appropriate and as are not inconsistent
with the provisions of this Agreement, or as may be required to comply with any
applicable law or with any rule or regulation made pursuant thereto or with any
rule or regulation of any stock exchange on which the Rights may from time to
time be listed, or to conform to

                                       -5-

<PAGE>   9




usage. Subject to the provisions of Section 11 and Section 22 hereof, the Rights
Certificates, whenever distributed, shall be dated as of the Record Date and on
their face shall entitle the holders thereof to purchase such number of one
one-thousandths of a share of Preferred Stock as shall be set forth therein at
the price set forth therein (such exercise price per one one-thousandth of a
share, the "Purchase Price"), but the amount and type of securities purchasable
upon the exercise of each Right and the Purchase Price thereof shall be subject
to adjustment as provided herein.

                (b) Any Rights Certificate issued pursuant to Section 3(a) or
Section 22 hereof that represents Rights beneficially owned by: (i) an Acquiring
Person or any Associate or Affiliate of an Acquiring Person, (ii) a transferee
of an Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee after the Acquiring Person becomes such, or (iii) a transferee of an
Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee prior to or concurrently with the Acquiring Person becoming such and
receives such Rights pursuant to either (A) a transfer (whether or not for
consideration) from the Acquiring Person to holders of equity interests in such
Acquiring Person or to any Person with whom such Acquiring Person has any
continuing agreement, arrangement or understanding regarding the transferred
Rights or (B) a transfer which the Board of Directors of the Company has
determined is part of a plan, arrangement or understanding which has as a
primary purpose or effect avoidance of Section 7(e) hereof, and any Rights
Certificate issued pursuant to Section 6 or Section 11 hereof upon transfer,
exchange, replacement or adjustment of any other Rights Certificate referred to
in this sentence, shall contain (to the extent feasible) the following legend:

                The Rights represented by this Rights Certificate are or were
                beneficially owned by a Person who was or became an Acquiring
                Person or an Affiliate or Associate of an Acquiring Person (as
                such terms are defined in the Rights Agreement). Accordingly,
                this Rights Certificate and the Rights represented hereby may
                become null and void in the circumstances specified in Section
                7(e) of such Agreement.

        Section 5. Countersignature and Registration.

                (a) The Rights Certificates shall be executed on behalf of the
Company by its Chairman of the Board, its President or any Vice President,
either manually or by facsimile signature, and shall have affixed thereto the
Company's seal or a facsimile thereof which shall be attested by the Secretary
or an Assistant Secretary of the Company, either manually or by facsimile
signature. The Rights Certificates shall be countersigned by the Rights Agent,
either manually or by facsimile signature, and shall not be valid for any
purpose unless so countersigned. In case any officer of the Company who shall
have signed any of the Rights Certificates shall cease to be such officer of the
Company before countersignature by the Rights Agent and issuance and delivery by
the Company, such Rights Certificates, nevertheless, may be countersigned by the
Rights Agent and issued and delivered by the Company with the same force and
effect as though the person who signed such Rights Certificates had not ceased
to be such officer of the Company and any Rights Certificates may be signed on
behalf of the Company by

                                       -6-

<PAGE>   10




any person who, at the actual date of the execution of such Rights Certificate,
shall be a proper officer of the Company to sign such Rights Certificate,
although at the date of the execution of this Rights Agreement any such person
was not such an officer.

                (b) Following the Distribution Date, the Rights Agent will keep
or cause to be kept, at its principal office or offices designated as the
appropriate place for surrender of Rights Certificates upon exercise or
transfer, books for registration and transfer of the Rights Certificates issued
hereunder. Such books shall show the names and addresses of the respective
holders of the Rights Certificates, the number of Rights evidenced on its face
by each of the Rights Certificates and the date of each of the Rights
Certificates.

        Section 6. Transfer, Split Up, Combination and Exchange of Rights
Certificates; Mutilated, Destroyed, Lost or Stolen Rights Certificates. (a)
Subject to the provisions of Section 4(b), Section 7(e) and Section 14 hereof,
at any time after the close of business on the Distribution Date, and at or
prior to the close of business on the Expiration Date, any Rights Certificate or
Certificates may be transferred, split up, combined or exchanged for another
Rights Certificate or Certificates, entitling the registered holder to purchase
a like number of one one-thousandths of a share of Preferred Stock (or,
following a Triggering Event, Common Stock, other securities, cash or other
assets, as the case may be) as the Rights Certificate or Certificates
surrendered then entitled such holder (or former holder in the case of a
transfer) to purchase. Any registered holder desiring to transfer, split up,
combine or exchange any Rights Certificate or Certificates shall make such
request in writing delivered to the Rights Agent, and shall surrender the Rights
Certificate or Certificates to be transferred, split up, combined or exchanged
at the principal office or offices of the Rights Agent designated for such
purpose. Neither the Rights Agent nor the Company shall be obligated to take any
action whatsoever with respect to the transfer of any such surrendered Rights
Certificate until the registered holder shall have completed and signed the
certificate contained in the form of assignment on the reverse side of such
Rights Certificate and shall have provided such additional evidence of the
identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or
Associates thereof as the Company shall reasonably request. Thereupon the Rights
Agent shall, subject to Section 4(b), Section 7(e) and Section 14 hereof,
countersign and deliver to the Person entitled thereto a Rights Certificate or
Rights Certificates, as the case may be, as so requested. The Company may
require payment of a sum sufficient to cover any tax or governmental charge that
may be imposed in connection with any transfer, split up, combination or
exchange of Rights Certificates.

                (b) Upon receipt by the Company and the Rights Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Rights Certificate, and, in case of loss, theft or destruction, of indemnity
or security reasonably satisfactory to them, and reimbursement to the Company
and the Rights Agent of all reasonable expenses incidental thereto, and upon
surrender to the Rights Agent and cancellation of the Rights Certificate if
mutilated, the Company will execute and deliver a new Rights Certificate of like
tenor to the Rights Agent for countersignature and delivery to the registered
owner in lieu of the Rights Certificate so lost, stolen, destroyed or mutilated.


                                       -7-

<PAGE>   11




        Section 7. Exercise of Rights, Purchase Price; Expiration Date of
Rights. (a) Subject to Section 7(e) hereof, the registered holder of any Rights
Certificate may exercise the Rights evidenced thereby (except as otherwise
provided herein including, without limitation, the restrictions on
exercisability set forth in Section 9(c), Section 11(a)(iii) and Section 23(a)
hereof) in whole or in part at any time after the Distribution Date upon
surrender of the Rights Certificate, with the form of election to purchase and
the certificate on the reverse side thereof duly executed, to the Rights Agent
at the principal office or offices of the Rights Agent designated for such
purpose, together with payment of the aggregate Purchase Price with respect to
the total number of one one-thousandths of a share of Preferred Stock (or other
securities, cash or other assets, as the case may be) as to which such
surrendered Rights are then exercisable, at or prior to the earlier of (i) the
close of business on August 4, 2008 (the "Final Expiration Date"), or (ii) the
time at which the Rights are redeemed as provided in Section 23 hereof (the
earlier of (i) and (ii) being herein referred to as the "Expiration Date").

                (b) The Purchase Price for each one one-thousandth of a share of
Preferred Stock pursuant to the exercise of a Right shall initially be $46, and
shall be subject to adjustment from time to time as provided in Sections 11 and
13(a) hereof and shall be payable in accordance with paragraph (c) below.

                (c) Upon receipt of a Rights Certificate representing
exercisable Rights, with the form of election to purchase and the certificate
duly executed, accompanied by payment, with respect to each Right so exercised,
of the Purchase Price per one one-thousandth of a share of Preferred Stock (or
other securities, cash or other assets, as the case may be) to be purchased as
set forth below and an amount equal to any applicable transfer tax, the Rights
Agent shall, subject to Section 20(k) hereof, thereupon promptly (i) (A)
requisition from any transfer agent of the shares of Preferred Stock (or make
available, if the Rights Agent is the transfer agent for such shares)
certificates for the total number of one one-thousandths of a share of Preferred
Stock to be purchased and the Company hereby irrevocably authorizes its transfer
agent to comply with all such requests, or (B) if the Company shall have elected
to deposit the total number of shares of Preferred Stock issuable upon exercise
of the Rights hereunder with a depositary agent, requisition from the depositary
agent depositary receipts representing such number of one one-thousandths of a
share of Preferred Stock as are to be purchased (in which case certificates for
the shares of Preferred Stock represented by such receipts shall be deposited by
the transfer agent with the depositary agent) and the Company will direct the
depositary agent to comply with such request, (ii) requisition from the Company
the amount of cash, if any, to be paid in lieu of fractional shares in
accordance with Section 14 hereof, (iii) after receipt of such certificates or
depositary receipts, cause the same to be delivered to, or upon the order of,
the registered holder of such Rights Certificate, registered in such name or
names as may be designated by such holder, and (iv) after receipt thereof,
deliver such cash, if any, to, or upon the order of, the registered holder of
such Rights Certificate. The payment of the Purchase Price (as such amount may
be reduced pursuant to Section 11(a)(iii) hereof) may be made (x) in cash or by
certified bank check or bank draft payable to the order of the Company, or (y)
by delivery of a certificate or certificates (with appropriate stock powers
executed in blank attached thereto) evidencing a number of shares of Common
Stock equal to the then Purchase Price divided by the closing price (as
determined pursuant to Section 11(d) hereof) per share of Common Stock on the
Trading Day (as defined

                                       -8-

<PAGE>   12




hereinafter) immediately preceding the date of such exercise. In the event that
the Company is obligated to issue other securities (including Common Stock) of
the Company, pay cash and/or distribute other property pursuant to Section 11
(a) hereof, the Company will make all arrangements necessary so that such other
securities, cash and/or other property are available for distribution by the
Rights Agent, if and when appropriate. The Company reserves the right to require
prior to the occurrence of a Triggering Event that, upon any exercise of Rights,
a number of Rights be exercised so that only whole shares of Preferred Stock
would be issued.

                (d) In case the registered holder of any Rights Certificate
shall exercise less than all the Rights evidenced thereby, a new Rights
Certificate evidencing Rights equivalent to the Rights remaining unexercised
shall be issued by the Rights Agent and delivered to, or upon the order of, the
registered holder of such Rights Certificate, registered in such name or names
as may be designated by such holder, subject to the provisions of Section 14
hereof.

                (e) Notwithstanding anything in this Agreement to the contrary,
from and after the occurrence of the Section 11(a)(ii) Event, any Rights
beneficially owned by (i) an Acquiring Person or an Associate or Affiliate of an
Acquiring Person, (ii) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee after the Acquiring Person
becomes such, or (iii) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee prior to or concurrently with
the Acquiring Person becoming such and receives such Rights pursuant to either
(A) a transfer (whether or not for consideration) from the Acquiring Person to
holders of equity interests in such Acquiring Person or to any Person with whom
the Acquiring Person has any continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which the Board of Directors
of the Company has determined is part of a plan, arrangement or understanding
which has as a primary purpose or effect the avoidance of this Section 7(e),
shall become null and void without any further action, and no holder of such
Rights shall have any rights whatsoever with respect to such Rights, whether
under any provision of this Agreement or otherwise. The Company shall use all
reasonable efforts to insure that the provisions of this Section 7(e) and
Section 4(b) hereof are complied with, but shall have no liability to any holder
of Rights Certificates or other Person as a result of its failure to make any
determinations with respect to an Acquiring Person or its Affiliates, Associates
or transferees hereunder.

                (f) Notwithstanding anything in this Agreement to the contrary,
neither the Rights Agent nor the Company shall be obligated to undertake any
action with respect to a registered holder upon the occurrence of any purported
exercise as set forth in this Section 7 unless such registered holder shall have
(i) completed and signed the certificate contained in the form of election to
purchase set forth on the reverse side of the Rights Certificate surrendered for
such exercise, and (ii) provided such additional evidence of the identity of the
Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates
thereof as the Company shall reasonably request.

        Section 8. Cancellation and Destruction of Rights Certificates. All
Rights Certificates surrendered for the purpose of exercise, transfer, split up,
combination or exchange shall, if surrendered to the Company or any of its
agents, be delivered to the Rights Agent for cancellation

                                       -9-

<PAGE>   13




or in cancelled form, or, if surrendered to the Rights Agent, shall be cancelled
by it, and no Rights Certificates shall be issued in lieu thereof except as
expressly permitted by any of the provisions of this Agreement. The Company
shall deliver to the Rights Agent for cancellation and retirement, and the
Rights Agent shall so cancel and retire, any other Rights Certificate purchased
or acquired by the Company otherwise than upon the exercise thereof. The Rights
Agent shall deliver all cancelled Rights Certificates to the Company, or shall,
at the written request of the Company, destroy such cancelled Rights
Certificates, and in such case shall deliver a certificate of destruction
thereof to the Company.

        Section 9. Reservation and Availability of Capital Stock. (a) The
Company covenants and agrees that it will cause to be reserved and kept
available out of its authorized and unissued shares of Preferred Stock (and,
following the occurrence of a Triggering Event, out of its authorized and
unissued shares of Common Stock and/or other securities or out of its authorized
and issued shares held in its treasury), the number of shares of Preferred Stock
(and, following the occurrence of a Triggering Event, Common Stock and/or other
securities) that, as provided in this Agreement including Section 11(a)(iii)
hereof, will be sufficient to permit the exercise in full of all outstanding
Rights.

                (b) So long as the shares of Preferred Stock (and, following the
occurrence of a Triggering Event, Common Stock and/or other securities) issuable
and deliverable upon the exercise of the Rights may be listed on any national
securities exchange, the Company shall use its best efforts to cause, from and
after such time as the Rights become exercisable, all shares reserved for such
issuance to be listed on such exchange upon official notice of issuance upon
such exercise.

                (c) The Company shall use its best efforts (i) to file, as soon
as practicable following the earliest date after the occurrence of the Section
11(a)(ii) Event on which the consideration to be delivered by the Company upon
exercise of the Rights has been determined in accordance with Section 11(a)(iii)
hereof, or as soon as is required by law following the Distribution Date, as the
case may be, a registration statement under the Securities Act of 1933, as
amended (the "Act"), with respect to the securities purchasable upon exercise of
the Rights on an appropriate form, (ii) to cause such registration statement to
become effective as soon as practicable after such filing, and (iii) to cause
such registration statement to remain effective (with a prospectus at all times
meeting the requirements of the Act) until the earlier of (A) the date as of
which the Rights are no longer exercisable for such securities, and (B) the date
of the expiration of the Rights. The Company will also take such action as may
be appropriate under, or to ensure compliance with, the securities or "blue sky"
laws of the various states in connection with the exercisability of the Rights.
The Company may temporarily suspend, for a period of time not to exceed ninety
(90) days after the date set forth in clause (i) of the first sentence of this
Section 9(c), the exercisability of the Rights in order to prepare and file such
registration statement and permit it to become effective. Upon any such
suspension, the Company shall issue a public announcement stating that the
exercisability of the Rights has been temporarily suspended, as well as a public
announcement at such time as the suspension is no longer in effect.
Notwithstanding any provision of this Agreement to the contrary, the Rights
shall not be exercisable in any jurisdiction if the requisite qualification in
such jurisdiction shall not have been obtained, the

                                      -10-

<PAGE>   14




exercise thereof shall not be permitted under applicable law or a registration
statement shall not have been declared effective.

                (d) The Company covenants and agrees that it will take all such
action as may be necessary to ensure that all one one-thousandths of a share of
Preferred Stock (and, following the occurrence of a Triggering Event, Common
Stock and/or other securities) delivered upon exercise of Rights shall, at the
time of delivery of the certificates for such shares (subject to payment of the
Purchase Price), be duly and validly authorized and issued and fully paid and
nonassessable.

                (e) The Company further covenants and agrees that it will pay
when due and payable any and all federal and state transfer taxes and charges
which may be payable in respect of the issuance or delivery of the Rights
Certificates and of any certificates for a number of one one-thousandths of a
share of Preferred Stock (or Common Stock and/or other securities, as the case
may be) upon the exercise of Rights. The Company shall not, however, be required
to pay any transfer tax which may be payable in respect of any transfer or
delivery of Rights Certificates to a Person other than, or the issuance or
delivery of a number of one one-thousandths of a share of Preferred Stock (or
Common Stock and/or other securities, as the case may be) in respect of a name
other than that of, the registered holder of the Rights Certificates evidencing
Rights surrendered for exercise or to issue or deliver any certificates for a
number of one one- thousandths of a share of Preferred Stock (or Common Stock
and/or other securities, as the case may be) in a name other than that of the
registered holder upon the exercise of any Rights until such tax shall have been
paid (any such tax being payable by the holder of such Rights Certificate at the
time of surrender) or until it has been established to the Company's
satisfaction that no such tax is due.

        Section 10. Preferred Stock Record Date. Each person in whose name any
certificate for a number of one one-thousandths of a share of Preferred Stock
(or Common Stock and/or other securities, as the case may be) is issued upon the
exercise of Rights shall for all purposes be deemed to have become the holder of
record of such fractional shares of Preferred Stock (or Common Stock and/or
other securities, as the case may be) represented thereby on, and such
certificate shall be dated, the date upon which the Rights Certificate
evidencing such Rights was duly surrendered and payment of the Purchase Price
(and all applicable transfer taxes) was made; provided, however, that if the
date of such surrender and payment is a date upon which the Preferred Stock (or
Common Stock and/or other securities, as the case may be) transfer books of the
Company are closed, such Person shall be deemed to have become the record holder
of such shares (fractional or otherwise) on, and such certificate shall be
dated, the next succeeding Business Day on which the Preferred Stock (or Common
Stock and/or other securities, as the case may be) transfer books of the Company
are open. Prior to the exercise of the Rights evidenced thereby, the holder of a
Rights Certificate shall not be entitled to any rights of a stockholder of the
Company with respect to shares for which the Rights shall be exercisable,
including, without limitation, the right to vote, to receive dividends or other
distributions or to exercise any preemptive rights, and shall not be entitled to
receive any notice of any proceedings of the Company, except as provided herein.


                                      -11-

<PAGE>   15




        Section 11. Adjustment of Purchase Price, Number and Kind of Shares or
Number of Rights. The Purchase Price, the number and kind of shares covered by
each Right and the number of Rights outstanding are subject to adjustment from
time to time as provided in this Section 11.

                         (a)(i) In the event the Company shall at any time after
         the date of this Agreement (A) declare a dividend on the Preferred
         Stock payable in shares of Preferred Stock, (B) subdivide the
         outstanding Preferred Stock, (C) combine the outstanding Preferred
         Stock into a smaller number of shares, or (D) issue any shares of its
         capital stock in a reclassification of the Preferred Stock (including
         any such reclassification in connection with a consolidation or merger
         in which the Company is the continuing or surviving corporation),
         except as otherwise provided in this Section 11(a) and Section 7(e)
         hereof, the Purchase Price in effect at the time of the record date for
         such dividend or of the effective date of such subdivision, combination
         or reclassification, and the number and kind of shares of Preferred
         Stock or capital stock, as the case may be, issuable on such date,
         shall be proportionately adjusted so that the holder of any Right
         exercised after such time shall be entitled to receive, upon payment of
         the Purchase Price then in effect, the aggregate number and kind of
         shares of Preferred Stock or capital stock, as the case may be, which,
         if such Right had been exercised immediately prior to such date and at
         a time when the Preferred Stock transfer books of the Company were
         open, he would have owned upon such exercise and been entitled to
         receive by virtue of such dividend, subdivision, combination or
         reclassification. If an event occurs which would require an adjustment
         under both this Section 11(a)(i) and Section 11(a)(ii) hereof, the
         adjustment provided for in this Section 11(a)(i) shall be in addition
         to, and shall be made prior to, any adjustment required pursuant to
         Section 11(a)(ii) hereof.

                         (ii) In the event any Person becomes an Acquiring
         Person, unless the event causing the 15% threshold to be crossed is a
         transaction set forth in Section 13(a) hereof, or is an acquisition of
         shares of Common Stock pursuant to a tender offer or an exchange offer
         for all outstanding shares of Common Stock at a price and on terms
         determined by at least a majority of the directors to be in the best
         interests of the Company and its stockholders (a "Qualifying Offer"),

then, promptly following the occurrence of such event, proper provision shall be
made so that each holder of a Right (except as provided below and in Section
7(e) hereof) shall thereafter have the right to receive, upon exercise thereof
at the then current Purchase Price in accordance with the terms of this
Agreement, in lieu of a number of one one-thousandths of a share of Preferred
Stock, such number of shares of Common Stock of the Company as shall equal the
result obtained by (x) multiplying the then current Purchase Price by the then
number of one one-thousandths of a share of Preferred Stock for which a Right
was exercisable immediately prior to the occurrence of the Section 11(a)(ii)
Event, and (y) dividing that product (which, following such occurrence, shall
thereafter be referred to as the "Purchase Price" for each Right and for all
purposes of this Agreement) by 50% of the current market price (determined
pursuant to Section 11(d) hereof) per

                                      -12-

<PAGE>   16




share of Common Stock on the date of such occurrence (such number of shares, the
"Adjustment Shares").

                         (iii) In the event that the number of shares of Common
         Stock which are authorized by the Certificate of Incorporation but not
         outstanding or reserved for issuance for purposes other than upon
         exercise of the Rights are not sufficient to permit the exercise in
         full of the Rights in accordance with the foregoing subparagraph (ii)
         of this Section 11(a), the Company shall: (A) determine the excess of
         (1) the value of the Adjustment Shares issuable upon the exercise of a
         Right (the "Current Value") over (2) the Purchase Price (such excess,
         the "Spread"), and (B) with respect to each Right (subject to Section
         7(e) hereof), make adequate provision to substitute for the Adjustment
         Shares, upon exercise of the Right and payment of the applicable
         Purchase Price, (1) cash, (2) a reduction in the Purchase Price, (3)
         Common Stock or other equity securities of the Company (including,
         without limitation, shares, or units of shares, of preferred stock
         which the Board of Directors of the Company has deemed to have the same
         value as shares of Common Stock (such shares of preferred stock,
         "common stock equivalents")), (4) debt securities of the Company, (5)
         other assets, or (6) any combination of the foregoing, having an
         aggregate value equal to the Current Value, where such aggregate value
         has been determined by the Board of Directors of the Company based upon
         the advice of a nationally recognized investment banking firm selected
         by the Board of Directors of the Company; provided, however, if the
         Company shall not have made adequate provision to deliver value
         pursuant to clause (B) above within thirty (30) days following the
         later of (x) the occurrence of the Section 11(a)(ii) Event and (y) the
         date on which the Company's right of redemption pursuant to Section
         23(a) expires (the later of (x) and (y) being referred to herein as the
         "Section 11(a)(ii) Trigger Date"), then the Company shall be obligated
         to deliver, upon the surrender for exercise of a Right and without
         requiring payment of the Purchase Price, shares of Common Stock (to the
         extent available) and then, if necessary, cash, which shares and/or
         cash have an aggregate value equal to the Spread. If the Board of
         Directors of the Company shall determine in good faith that it is
         likely that sufficient additional shares of Common Stock could be
         authorized for issuance upon exercise in full of the Rights, the thirty
         (30) day period set forth above may be extended to the extent
         necessary, but not more than ninety (90) days after the Section
         11(a)(ii) Trigger Date, in order that the Company may seek stockholder
         approval for the authorization of such additional shares (such period,
         as it may be extended, the "Substitution Period"). To the extent that
         the Company determines that some action need be taken pursuant to the
         first and/or second sentences of this Section 11(a)(iii), the Company
         (x) shall provide, subject to Section 7(e) hereof, that such action
         shall apply uniformly to all outstanding Rights, and (y) may suspend
         the exercisability of the Rights until the expiration of the
         Substitution Period in order to seek any authorization of additional
         shares and/or to decide the appropriate form of distribution to be made
         pursuant to such first sentence and to determine the value thereof. In
         the event of any such suspension, the Company shall issue a public

                                      -13-

<PAGE>   17




         announcement stating that the exercisability of the Rights has been
         temporarily suspended, as well as a public announcement at such time as
         the suspension is no longer in effect. For purposes of this Section
         11(a)(iii), the value of each Adjustment Share shall be the current
         market price (as determined pursuant to Section 11(d) hereof) per share
         of the Common Stock on the Section 11(a)(ii) Trigger Date and the per
         share or per unit value of any "common stock equivalent" shall be
         deemed to be equal to the current market price (as determined pursuant
         to Section 11(d) hereof) of the Common Stock on such date.

                (b) In case the Company shall fix a record date for the issuance
of rights, options or warrants to all holders of Preferred Stock entitling them
to subscribe for or purchase (for a period expiring within forty-five (45)
calendar days after such record date) Preferred Stock (or shares having the same
rights, privileges and preferences as the shares of Preferred Stock ("equivalent
preferred stock")) or securities convertible into Preferred Stock or equivalent
preferred stock at a price per share of Preferred Stock or per share of
equivalent preferred stock (or having a conversion price per share, if a
security convertible into Preferred Stock or equivalent preferred stock) less
than the current market price (as determined pursuant to Section 11(d) hereof)
per share of Preferred Stock on such record date, the Purchase Price to be in
effect after such record date shall be determined by multiplying the Purchase
Price in effect immediately prior to such record date by a fraction, the
numerator of which shall be the number of shares of Preferred Stock outstanding
on such record date, plus the number of shares of Preferred Stock which the
aggregate offering price of the total number of shares of Preferred Stock and/or
equivalent preferred stock so to be offered (and/or the aggregate initial
conversion price of the convertible securities so to be offered) would purchase
at such current market price, and the denominator of which shall be the number
of shares of Preferred Stock outstanding on such record date, plus the number of
additional shares of Preferred Stock and/or equivalent preferred stock to be
offered for subscription or purchase (or into which the convertible securities
so to be offered are initially convertible). In case such subscription price may
be paid by delivery of consideration part or all of which may be in a form other
than cash, the value of such consideration shall be as determined in good faith
by the Board of Directors of the Company, whose determination shall be described
in a statement filed with the Rights Agent and shall be binding on the Rights
Agent and the holders of the Rights, shares of Preferred Stock owned by or held
for the account of the Company shall not be deemed outstanding for the purpose
of any such computation. Such adjustment shall be made successively whenever
such a record date is fixed, and in the event that such rights or warrants are
not so issued, the Purchase Price shall be adjusted to be the Purchase Price
which would then be in effect if such record date had not been fixed.

                (c) In case the Company shall fix a record date for a
distribution to all holders of Preferred Stock (including any such distribution
made in connection with a consolidation or merger in which the Company is the
continuing corporation) of evidences of indebtedness, cash (other than a regular
quarterly cash dividend out of the earnings or retained earnings of the
Company), assets (other than a dividend payable in Preferred Stock, but
including any dividend payable in stock other than Preferred Stock) or
subscription rights or warrants (excluding those referred to in Section 11(b)
hereof), the Purchase Price to be in effect after such record date shall be
determined by multiplying the Purchase Price in effect immediately prior to such
record date

                                      -14-

<PAGE>   18




by a fraction, the numerator of which shall be the current market price (as
determined pursuant to Section 11(d) hereof) per share of Preferred Stock on
such record date, less the fair market value (as determined in good faith by the
Board of Directors of the Company, whose determination shall be described in a
statement filed with the Rights Agent) of the portion of the cash, assets or
evidences of indebtedness so to be distributed or of such subscription rights or
warrants applicable to a share of Preferred Stock and the denominator of which
shall be such current market price (as determined pursuant to Section 11(d)
hereof) per share of Preferred Stock. Such adjustments shall be made
successively whenever such a record date is fixed, and in the event that such
distribution is not so made, the Purchase Price shall be adjusted to be the
Purchase Price which would have been in effect if such record date had not been
fixed.

                         (d)(i) For the purpose of any computation hereunder,
         other than computations made pursuant to Section 11(a)(iii) hereof, the
         "current market price" per share of Common Stock on any date shall be
         deemed to be the average of the daily closing prices per share of such
         Common Stock for the thirty (30) consecutive Trading Days (as such term
         is hereinafter defined) immediately prior to such date, and for
         purposes of computations made pursuant to Section 11(a)(iii) hereof,
         the "current market price" per share of Common Stock on any date shall
         be deemed to be the average of the daily closing prices per share of
         such Common Stock for the ten (10) consecutive Trading Days immediately
         following such date; provided, however, that in the event that the
         current market price per share of the Common Stock is determined during
         a period following the announcement by the issuer of such Common Stock
         of (A) a dividend or distribution on such Common Stock payable in
         shares of such Common Stock or securities convertible into shares of
         such Common Stock (other than the Rights), or (B) any subdivision,
         combination or reclassification of such Common Stock, and the
         ex-dividend date for such dividend or distribution, or the record date
         for such subdivision, combination or reclassification shall not have
         occurred prior to the commencement of the requisite thirty (30) Trading
         Day or ten (10) Trading Day period, as set forth above, then, and in
         each such case, the "current market price" shall be properly adjusted
         to take into account ex-dividend trading. The closing price for each
         day shall be the last sale price, regular way, or, in case no such sale
         takes place on such day, the average of the closing bid and asked
         prices, regular way, in either case as reported in the principal
         consolidated transaction reporting system with respect to securities
         listed or admitted to trading on The Nasdaq Stock Market's National
         Market or, if the shares of Common Stock are not listed or admitted to
         trading on The Nasdaq Stock Market's National Market, as reported in
         the principal consolidated transaction reporting system with respect to
         securities listed on the principal national securities exchange on
         which the shares of Common Stock are listed or admitted to trading or,
         if the shares of Common Stock are not listed or admitted to trading on
         any national securities exchange, the last quoted price or, if not so
         quoted, the average of the high bid and low asked prices in the
         over-the-counter market, as reported by the National Association of
         Securities Dealers, Inc. Automated Quotation System ("NASDAQ") or such
         other system then in use, or, if on any such date the shares of Common
         Stock are not quoted by any such

                                      -15-

<PAGE>   19




         organization, the average of the closing bid and asked prices as
         furnished by a professional market maker making a market in the Common
         Stock selected by the Board of Directors of the Company. If on any such
         date no market maker is making a market in the Common Stock, the fair
         value of such shares on such date as determined in good faith by the
         Board of Directors of the Company shall be used. The term "Trading Day"
         shall mean a day on which the principal national securities exchange on
         which the shares of Common Stock are listed or admitted to trading is
         open for the transaction of business or, if the shares of Common Stock
         are not listed or admitted to trading on any national securities
         exchange, a Business Day. If the Common Stock is not publicly held or
         not so listed or traded, "current market price" per share shall mean
         the fair value per share as determined in good faith by the Board of
         Directors of the Company, whose determination shall be described in a
         statement filed with the Rights Agent and shall be conclusive for all
         purposes.

                         (ii) For the purpose of any computation hereunder, the
         "current market price" per share of Preferred Stock shall be determined
         in the same manner as set forth above for the Common Stock in clause
         (i) of this Section 11(d) (other than the last sentence thereof). If
         the current market price per share of Preferred Stock cannot be
         determined in the manner provided above or if the Preferred Stock is
         not publicly held or listed or traded in a manner described in clause
         (i) of this Section 11(d), the "current market price" per share of
         Preferred Stock shall be conclusively deemed to be an amount equal to
         1,000 (as such number may be appropriately adjusted for such events as
         stock splits, stock dividends and recapitalizations with respect to the
         Common Stock occurring after the date of this Agreement) multiplied by
         the current market price per share of the Common Stock. If neither the
         Common Stock nor the Preferred Stock is publicly held or so listed or
         traded, "current market price" per share of the Preferred Stock shall
         mean the fair value per share as determined in good faith by the Board
         of Directors of the Company, whose determination shall be described in
         a statement filed with the Rights Agent and shall be conclusive for all
         purposes. For all purposes of this Agreement, the "current market
         price" of one one-thousandth of a share of Preferred Stock shall be
         equal to the "current market price" of one share of Preferred Stock
         divided by 1,000.

                (e) Anything herein to the contrary notwithstanding, no
adjustment in the Purchase Price shall be required unless such adjustment would
require an increase or decrease of at least one percent (1%) in the Purchase
Price; provided, however, that any adjustments which by reason of this Section
11(e) are not required to be made shall be carried forward and taken into
account in any subsequent adjustment. All calculations under this Section 11
shall be made to the nearest cent or to the nearest ten-thousandth of a share of
Common Stock or other share or one- millionth of a share of Preferred Stock, as
the case may be. Notwithstanding the first sentence of this Section 11(e), any
adjustment required by this Section 11 shall be made no later than the earlier
of (i) three (3) years from the date of the transaction which mandates such
adjustment, or (ii) the Expiration Date.

                                      -16-

<PAGE>   20




                (f) If as a result of an adjustment made pursuant to Section
11(a)(ii) or Section 13(a) hereof, the holder of any Right thereafter exercised
shall become entitled to receive any shares of capital stock other than
Preferred Stock, thereafter the number of such other shares so receivable upon
exercise of any Right and the Purchase Price thereof shall be subject to
adjustment from time to time in a manner and on terms as nearly equivalent as
practicable to the provisions with respect to the Preferred Stock contained in
Sections 11(a), (b), (c), (e), (g), (h), (i), (j), (k) and (m), and the
provisions of Sections 7, 9, 10, 13 and 14 hereof with respect to the Preferred
Stock shall apply on like terms to any such other shares.

                (g) All Rights originally issued by the Company subsequent to
any adjustment made to the Purchase Price hereunder shall evidence the right to
purchase, at the adjusted Purchase Price, the number of one one-thousandths of a
share of Preferred Stock purchasable from time to time hereunder upon exercise
of the Rights, all subject to further adjustment as provided herein.

                (h) Unless the Company shall have exercised its election as
provided in Section 11 (i), upon each adjustment of the Purchase Price as a
result of the calculations made in Sections 11(b) and (c), each Right
outstanding immediately prior to the making of such adjustment shall thereafter
evidence the right to purchase, at the adjusted Purchase Price, that number of
one one-thousandths of a share of Preferred Stock (calculated to the nearest
one-millionth) obtained by (i) multiplying (x) the number of one
one-thousandths of a share covered by a Right immediately prior to this
adjustment, by (y) the Purchase Price in effect immediately prior to such
adjustment of the Purchase Price, and (ii) dividing the product so obtained by
the Purchase Price in effect immediately after such adjustment of the Purchase
Price.

                (i) The Company may elect on or after the date of any adjustment
of the Purchase Price to adjust the number of Rights, in lieu of any adjustment
in the number of one one-thousandths of a share of Preferred Stock purchasable
upon the exercise of a Right. Each of the Rights outstanding after the
adjustment in the number of Rights shall be exercisable for the number of one
one-thousandths of a share of Preferred Stock for which a Right was exercisable
immediately prior to such adjustment. Each Right held of record prior to such
adjustment of the number of Rights shall become that number of Rights
(calculated to the nearest one-ten-thousandth) obtained by dividing the
Purchase Price in effect immediately prior to adjustment of the Purchase Price
by the Purchase Price in effect immediately after adjustment of the Purchase
Price. The Company shall make a public announcement of its election to adjust
the number of Rights, indicating the record date for the adjustment, and, if
known at the time, the amount of the adjustment to be made. This record date may
be the date on which the Purchase Price is adjusted or any day thereafter, but,
if the Rights Certificates have been issued, shall be at least ten (10) days
later than the date of the public announcement. If Rights Certificates have been
issued, upon each adjustment of the number of Rights pursuant to this Section 11
(i), the Company shall, as promptly as practicable, cause to be distributed to
holders of record of Rights Certificates on such record date Rights Certificates
evidencing, subject to Section 14 hereof, the additional Rights to which such
holders shall be entitled as a result of such adjustment, or, at the option of
the Company, shall cause to be distributed to such holders of record in
substitution and replacement for the Rights Certificates held by such holders
prior to the date of adjustment, and upon

                                      -17-

<PAGE>   21




surrender thereof, if required by the Company, new Rights Certificates
evidencing all the Rights to which such holders shall be entitled after such
adjustment. Rights Certificates so to be distributed shall be issued, executed
and countersigned in the manner provided for herein (and may bear, at the option
of the Company, the adjusted Purchase Price) and shall be registered in the
names of the holders of record of Rights Certificates on the record date
specified in the public announcement.

                (j) Irrespective of any adjustment or change in the Purchase
Price or the number of one one-thousandths of a share of Preferred Stock
issuable upon the exercise of the Rights, the Rights Certificates theretofore
and thereafter issued may continue to express the Purchase Price per one
one-thousandths of a share and the number of one one-thousandths of a share
which were expressed in the initial Rights Certificates issued hereunder.

                (k) Before taking any action that would cause an adjustment
reducing the Purchase Price below the then stated value, if any, of the number
of one one-thousandths of a share of Preferred Stock issuable upon exercise of
the Rights, the Company shall take any corporate action which may, in the
opinion of its counsel, be necessary in order that the Company may validly and
legally issue fully paid and nonassessable such number of one one-thousandths of
a share of Preferred Stock at such adjusted Purchase Price.

                (l) In any case in which this Section 11 shall require that an
adjustment in the Purchase Price be made effective as of a record date for a
specified event, the Company may elect to defer until the occurrence of such
event the issuance to the holder of any Right exercised after such record date
the number of one one-thousandths of a share of Preferred Stock and other
capital stock or securities of the Company, if any, issuable upon such exercise
over and above the number of one one-thousandths of a share of Preferred Stock
and other capital stock or securities of the Company, if any, issuable upon such
exercise on the basis of the Purchase Price in effect prior to such adjustment;
provided, however, that the Company shall deliver to such holder a due bill or
other appropriate instrument evidencing such holder's right to receive such
additional shares (fractional or otherwise) or securities upon the occurrence of
the event requiring such adjustment.

                (m) Anything in this Section 11 to the contrary notwithstanding,
the Company shall be entitled to make such reductions in the Purchase Price, in
addition to those adjustments expressly required by this Section 11, as and to
the extent that in their good faith judgment the Board of Directors of the
Company shall determine to be advisable in order that any (i) consolidation or
subdivision of the Preferred Stock, (ii) issuance wholly for cash of any shares
of Preferred Stock at less than the current market price, (iii) issuance wholly
for cash of shares of Preferred Stock or securities which by their terms are
convertible into or exchangeable for shares of Preferred Stock, (iv) stock
dividends, or (v) issuance of rights, options or warrants referred to in this
Section 11, hereafter made by the Company to holders of its Preferred Stock
shall not be taxable to such stockholders.


                                      -18-

<PAGE>   22




                (n) The Company covenants and agrees that it shall not, at any
time after the Distribution Date, (i) consolidate with any other Person (other
than a Subsidiary of the Company in a transaction which complies with Section
11(o) hereof), (ii) merge with or into any other Person (other than a Subsidiary
of the Company in a transaction which complies with Section 11(o) hereof), or
(iii) sell or transfer (or permit any Subsidiary to sell or transfer), in one
transaction, or a series of related transactions, assets or earning power
aggregating more than 50% of the assets or earning power of the Company and its
Subsidiaries (taken as a whole) to any other Person or Persons (other than the
Company and/or any of its Subsidiaries in one or more transactions each of which
complies with Section 11(o) hereof), if (x) at the time of or immediately after
such consolidation, merger or sale there are any rights, warrants or other
instruments or securities outstanding or agreements in effect which would
substantially diminish or otherwise eliminate the benefits intended to be
afforded by the Rights or (y) prior to, simultaneously with or immediately after
such consolidation, merger or sale, the stockholders of the Person who
constitutes, or would constitute, the "Principal Party" for purposes of Section
13(a) hereof shall have received a distribution of Rights previously owned by
such Person or any of its Affiliates and Associates.

                (o) The Company covenants and agrees that, after the
Distribution Date, it will not, except as permitted by Section 23 or Section 26
hereof, take (or permit any Subsidiary to take) any action if at the time such
action is taken it is reasonably foreseeable that such action will diminish
substantially or otherwise eliminate the benefits intended to be afforded by the
Rights.

                (p) Anything in this Agreement to the contrary notwithstanding,
in the event that the Company shall at any time after the Record Date and prior
to the Distribution Date (i) declare a dividend on the outstanding shares of
Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding
shares of Common Stock, or (iii) combine the outstanding shares of Common Stock
into a smaller number of shares, the number of Rights associated with each share
of Common Stock then outstanding, or issued or delivered thereafter but prior to
the Distribution Date, shall be proportionately adjusted so that the number of
Rights thereafter associated with each share of Common Stock following any such
event shall equal the result obtained by multiplying the number of Rights
associated with each share of Common Stock immediately prior to such event by a
fraction the numerator of which shall be the total number of shares of Common
Stock outstanding immediately prior to the occurrence of the event and the
denominator of which shall be the total number of shares of Common Stock
outstanding immediately following the occurrence of such event.

        Section 12. Certificate of Adjusted Purchase Price or Number of Shares.
Whenever an adjustment is made as provided in Section 11 and Section 13 hereof,
the Company shall (a) promptly prepare a certificate setting forth such
adjustment and a brief statement of the facts accounting for such adjustment,
(b) promptly file with the Rights Agent, and with each transfer agent for the
Preferred Stock and the Common Stock, a copy of such certificate, and (c) mail
or cause the Rights Agent to mail a brief summary thereof to each holder of a
Rights Certificate (or, if prior to the Distribution Date, to each holder of a
certificate representing shares of Common

                                      -19-

<PAGE>   23




Stock) in accordance with Section 25 hereof. The Rights Agent shall be fully
protected in relying on any such certificate and on any adjustment therein
contained.

        Section 13. Consolidation, Merger or Sale or Transfer of Assets or
Earning Power.

                (a) In the event that, following the Stock Acquisition Date,
directly or indirectly, (x) the Company shall consolidate with, or merge with
and into, any other Person (other than a Subsidiary of the Company in a
transaction which complies with Section 11(o) hereof), and the Company shall not
be the continuing or surviving corporation of such consolidation or merger, (y)
any Person (other than a Subsidiary of the Company in a transaction which
complies with Section 11(o) hereof) shall consolidate with, or merge with or
into, the Company, and the Company shall be the continuing or surviving
corporation of such consolidation or merger and, in connection with such
consolidation or merger, all or part of the outstanding shares of Common Stock
shall be changed into or exchanged for stock or other securities of any other
Person or cash or any other property, or (z) the Company shall sell or otherwise
transfer (or one or more of its Subsidiaries shall sell or otherwise transfer),
in one transaction or a series of related transactions, assets or earning power
aggregating more than 50% of the assets or earning power of the Company and its
Subsidiaries (taken as a whole) to any Person or Persons (other than the Company
or any Subsidiary of the Company in one or more transactions each of which
complies with Section 11(o) hereof), then, and in each such case (except as may
be contemplated by Section 13(d) hereof), proper provision shall be made so
that: (i) each holder of a Right, except as provided in Section 7(e) hereof,
shall thereafter have the right to receive, upon the exercise thereof at the
then current Purchase Price in accordance with the terms of this Agreement, such
number of validly authorized and issued, fully paid, nonassessable and freely
tradeable shares of Common Stock of the Principal Party (as such term is
hereinafter defined), not subject to any liens, encumbrances, rights of first
refusal or other adverse claims, as shall be equal to the result obtained by (1)
multiplying the then current Purchase Price by the number of one one-thousandths
of a share of Preferred Stock for which a Right is exercisable immediately prior
to the first occurrence of a Section 13 Event (or, if the Section 11(a)(ii)
Event has occurred prior to the first occurrence of a Section 13 Event,
multiplying the number of such one one-thousandths of a share for which a Right
was exercisable immediately prior to the occurrence of the Section 11(a)(ii)
Event by the Purchase Price in effect immediately prior to such first
occurrence), and dividing that product (which, following the first occurrence of
a Section 13 Event, shall be referred to as the "Purchase Price" for each Right
and for all purposes of this Agreement) by (2) 50% of the current market price
(determined pursuant to Section 11(d)(i) hereof) per share of the Common Stock
of such Principal Party on the date of consummation of such Section 13 Event,
(ii) such Principal Party shall thereafter be liable for, and shall assume, by
virtue of such Section 13 Event, all the obligations and duties of the Company
pursuant to this Agreement; (iii) the term "Company" shall thereafter be deemed
to refer to such Principal Party, it being specifically intended that the
provisions of Section 11 hereof shall apply only to such Principal Party
following the first occurrence of a Section 13 Event; (iv) such Principal Party
shall take such steps (including, but not limited to, the reservation of a
sufficient number of shares of its Common Stock) in connection with the
consummation of any such transaction as may be necessary to assure that the
provisions hereof shall thereafter be applicable, as nearly as reasonably may
be, in relation to its shares of Common Stock thereafter deliverable upon the

                                      -20-

<PAGE>   24




exercise of the Rights; and (v) the provisions of Section 11(a)(ii) hereof shall
be of no effect following the first occurrence of any Section 13 Event.

                (b) "Principal Party" shall mean

                         (i) in the case of any transaction described in clause
                (x) or (y) of the first sentence of Section 13(a), the Person
                that is the issuer of any securities into which shares of Common
                Stock of the Company are converted in such merger or
                consolidation, and if no securities are so issued, the Person
                that is the other party to such merger or consolidation; and

                         (ii) in the case of any transaction described in clause
                (z) of the first sentence of Section 13(a), the Person that is
                the party receiving the greatest portion of the assets or
                earning power transferred pursuant to such transaction or
                transactions;

provided, however, that in any such case, (1) if the Common Stock of such Person
is not at such time and has not been continuously over the preceding twelve (12)
month period registered under Section 12 of the Exchange Act, and such Person is
a direct or indirect Subsidiary of another Person the Common Stock of which is
and has been so registered, "Principal Party" shall refer to such other Person;
and (2) in case such Person is a Subsidiary, directly or indirectly, of more
than one Person, the Common Stocks of two or more of which are and have been so
registered, "Principal Party" shall refer to whichever of such Persons is the
issuer of the Common Stock having the greatest aggregate market value.

                (c) The Company shall not consummate any such consolidation,
merger, sale or transfer unless the Principal Party shall have a sufficient
number of authorized shares of its Common Stock which have not been issued or
reserved for issuance to permit the exercise in full of the Rights in accordance
with this Section 13 and unless prior thereto the Company and such Principal
Party shall have executed and delivered to the Rights Agent a supplemental
agreement providing for the terms set forth in paragraphs (a) and (b) of this
Section 13 and further providing that, as soon as practicable after the date of
any consolidation, merger or sale of assets mentioned in paragraph (a) of this
Section 13, the Principal Party will

                         (i) prepare and file a registration statement under the
                Act, with respect to the Rights and the securities purchasable
                upon exercise of the Rights on an appropriate form, and will use
                its best efforts to cause such registration statement to (A)
                become effective as soon as practicable after such filing and
                (B) remain effective (with a prospectus at all times meeting the
                requirements of the Act) until the Expiration Date; and

                         (ii) will deliver to holders of the Rights historical
                financial statements for the Principal Party and each of its
                Affiliates which comply in all respects with the requirements
                for registration on Form 10 under the Exchange Act.

                                      -21-

<PAGE>   25




The provisions of this Section 13 shall similarly apply to successive mergers or
consolidations or sales or other transfers. In the event that a Section 13 Event
shall occur at any time after the occurrence of the Section 11(a)(ii) Event, the
Rights which have not theretofore been exercised shall thereafter become
exercisable in the manner described in Section 13(a).

                (d) Notwithstanding anything in this Agreement to the contrary,
Section 13 shall not be applicable to a transaction described in subparagraphs
(x) and (y) of Section 13(a) if (i) such transaction is consummated with a
Person or Persons who acquired shares of Common Stock pursuant to a Qualifying
Offer (or a wholly owned subsidiary of such Person or Persons), (ii) the price
per share of Common Stock offered in such transaction is not less than the price
per share of Common Stock paid to all holders of shares of Common Stock whose
shares were purchased pursuant to such tender offer or exchange offer, and (iii)
the form of consideration being offered to the remaining holders of shares of
Common Stock pursuant to such transaction is the same as the form of
consideration paid pursuant to such tender offer or exchange offer. Upon
consummation of any such transaction contemplated by this Section 13(d), all
rights hereunder shall expire.

        Section 14.   Fractional Rights and Fractional Shares.

                (a) The Company shall not be required to issue fractions of
Rights, except prior to the Distribution Date as provided in Section 11(p)
hereof, or to distribute Rights Certificates which evidence fractional Rights.
In lieu of such fractional Rights, there shall be paid to the registered holders
of the Rights Certificates with regard to which such fractional Rights would
otherwise be issuable, an amount in cash equal to the same fraction of the
current market value of a whole Right. For purposes of this Section 14(a), the
current market value of a whole Right shall be the closing price of the Rights
for the Trading Day immediately prior to the date on which such fractional
Rights would have been otherwise issuable. The closing price of the Rights for
any day shall be the last sale price, regular way, or, in case no such sale
takes place on such day, the average of the closing bid and asked prices,
regular way, in either case as reported in the principal consolidated
transaction reporting system with respect to securities listed or admitted to
trading on The Nasdaq Stock Market's National Market or, if the Rights are not
listed or admitted to trading on The Nasdaq Stock Market's National Market, as
reported in the principal consolidated transaction reporting system with respect
to securities listed on the principal national securities exchange on which the
Rights are listed or admitted to trading, or if the Rights are not listed or
admitted to trading on any national securities exchange, the last quoted price
or, if not so quoted, the average of the high bid and low asked prices in the
over-the-counter market, as reported by NASDAQ or such other system then in use
or, if on any such date the Rights are not quoted by any such organization, the
average of the closing bid and asked prices as furnished by a professional
market maker making a market in the Rights selected by the Board of Directors of
the Company. If on any such date no such market maker is making a market in the
Rights the fair value of the Rights on such date as determined in good faith by
the Board of Directors of the Company shall be used.

                (b) The Company shall not be required to issue fractions of
shares of Preferred Stock (other than fractions which are integral multiples of
one one-thousandth of a share of

                                      -22-

<PAGE>   26




Preferred Stock), which may, at the option of the Company, be evidenced by
depositary receipts upon exercise of the Rights or to distribute certificates
which evidence fractional shares of Preferred Stock (other than fractions which
are integral multiples of one one-thousandth of a share of Preferred Stock). In
lieu of fractional shares of Preferred Stock that are not integral multiples of
one one-thousandth of a share of Preferred Stock, the Company may pay to the
registered holders of Rights Certificates at the time such Rights are exercised
as herein provided an amount in cash equal to the same fraction of the current
market value of one one-thousandth of a share of Preferred Stock. For purposes
of this Section 14(b), the current market value of one one-thousandth of a share
of Preferred Stock shall be one one-thousandth of the closing price of a share
of Preferred Stock (as determined pursuant to Section 11(d)(ii) hereof) for the
Trading Day immediately prior to the date of such exercise.

                (c) Following the occurrence of a Triggering Event, the Company
shall not be required to issue fractions of shares of Common Stock upon exercise
of the Rights or to distribute certificates which evidence fractional shares of
Common Stock. In lieu of fractional shares of Common Stock, the Company may pay
to the registered holders of Rights Certificates at the time such Rights are
exercised as herein provided an amount in cash equal to the same fraction of the
current market value of one (1) share of Common Stock. For purposes of this
Section 14(c), the current market value of one (1) share of Common Stock shall
be the closing price of one (1) share of Common Stock (as determined pursuant to
Section 11(d)(i) hereof) for the Trading Day immediately prior to the date of
such exercise.

                (d) The holder of a Right by the acceptance of the Rights
expressly waives his right to receive any fractional Rights or any fractional
shares upon exercise of a Right, except as permitted by this Section 14.

        Section 15. Rights of Action. All rights of action in respect of this
Agreement are vested in the respective registered holders of the Rights
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Stock); and any registered holder of any Rights Certificate (or, prior to
the Distribution Date, of the Common Stock), without the consent of the Rights
Agent or of the holder of any other Rights Certificate (or, prior to the
Distribution Date, of the Common Stock), may, in his own behalf and for his own
benefit, enforce, and may institute and maintain any suit, action or proceeding
against the Company to enforce, or otherwise act in respect of, his right to
exercise the Rights evidenced by such Rights Certificate in the manner provided
in such Rights Certificate and in this Agreement. Without limiting the foregoing
or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and shall be entitled to specific performance
of the obligations hereunder and injunctive relief against actual or threatened
violations of the obligations hereunder of any Person subject to this Agreement.

        Section 16. Agreement of Rights Holders. Every holder of a Right by
accepting the same consents and agrees with the Company and the Rights Agent and
with every other holder of a Right that:


                                      -23-

<PAGE>   27




                (a) prior to the Distribution Date, the Rights will be
transferable only in connection with the transfer of Common Stock;

                (b) after the Distribution Date, the Rights Certificates are
transferable only on the registry books of the Rights Agent if surrendered at
the principal office or offices of the Rights Agent designated for such
purposes, duly endorsed or accompanied by a proper instrument of transfer and
with the appropriate forms and certificates fully executed;

                (c) subject to Section 6(a) and Section 7(f) hereof, the Company
and the Rights Agent may deem and treat the person in whose name a Rights
Certificate (or, prior to the Distribution Date, the associated Common Stock
certificate) is registered as the absolute owner thereof and of the Rights
evidenced thereby (notwithstanding any notations of ownership or writing on the
Rights Certificates or the associated Common Stock certificate made by anyone
other than the Company or the Rights Agent) for all purposes whatsoever, and
neither the Company nor the Rights Agent, subject to the last sentence of
Section 7(e) hereof, shall be required to be affected by any notice to the
contrary; and

                (d) notwithstanding anything in this Agreement to the contrary,
neither the Company nor the Rights Agent shall have any liability to any holder
of a Right or other Person as a result of its inability to perform any of its
obligations under this Agreement by reason of any preliminary or permanent
injunction or other order, decree or ruling issued by a court of competent
jurisdiction or by a governmental, regulatory or administrative agency or
commission, or any statute, rule, regulation or executive order promulgated or
enacted by any governmental authority, prohibiting or otherwise restraining
performance of such obligation; provided, however, the Company must use its best
efforts to have any such order, decree or ruling lifted or otherwise overturned
as soon as possible.

        Section 17. Rights Certificate Holder Not Deemed a Stockholder.
No holder, as such, of any Rights Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the number of one
one-thousandths of a share of Preferred Stock or any other securities of the
Company which may at any time be issuable on the exercise of the Rights
represented thereby, nor shall anything contained herein or in any Rights
Certificate be construed to confer upon the holder of any Rights Certificate, as
such, any of the rights of a stockholder of the Company or any right to vote for
the election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in Section 24 hereof), or to receive dividends or subscription rights,
or otherwise, until the Right or Rights evidenced by such Rights Certificate
shall have been exercised in accordance with the provisions hereof.

        Section 18. Concerning the Rights Agent.

                (a) The Company agrees to pay to the Rights Agent reasonable
compensation for all services rendered by it hereunder and, from time to time,
on demand of the Rights Agent, its reasonable expenses and counsel fees and
disbursements and other disbursements incurred in

                                      -24-

<PAGE>   28




the administration and execution of this Agreement and the exercise and
performance of its duties hereunder. The Company shall indemnify the Rights
Agent for, and to hold it harmless against, any loss, liability, or expense
("Loss") arising out of or in connection with its duties under this Agreement,
including the costs and expenses of defending itself against any Loss, unless
such Loss shall have been determined by a court of competent jurisdiction to be
a result of the Right Agent's gross negligence or intentional misconduct. The
obligations of the Company under this section shall survive the termination of
this Agreement.

                (b) The Rights Agent shall be protected and shall incur no
liability for or in respect of any action taken, suffered or omitted by it in
connection with its administration of this Agreement in reliance upon any Rights
Certificate or certificate for Common Stock or for other securities of the
Company, instrument of assignment or transfer, power of attorney, endorsement,
affidavit, letter, notice, direction, consent, certificate, statement, or other
paper or document believed by it to be genuine and to be signed, executed and,
where necessary, verified or acknowledged, by the proper Person or Persons.

        Section 19. Merger or Consolidation or Change of Name of Rights.

                (a) Any corporation into which the Rights Agent or any successor
Rights Agent may be merged or with which it may be consolidated, or any
corporation resulting from any merger or consolidation to which the Rights Agent
or any successor Rights Agent shall be a party, or any corporation succeeding to
the corporate trust or stock transfer business of the Rights Agent or any
successor Rights Agent, shall be the successor to the Rights Agent under this
Agreement without the execution or filing of any paper or an further act on the
part of any of the parties hereto; provided, however, that such corporation
would be eligible for appointment as a successor Rights Agent under the
provisions of Section 21 hereof. In case at the time such successor Rights Agent
shall succeed to the agency created by this Agreement, any of the Rights
Certificates shall have been countersigned but not delivered, any such successor
Rights Agent may adopt the countersignature of a predecessor Rights Agent and
deliver such Rights Certificates so countersigned; and in case at that time any
of the Rights Certificates shall not have been countersigned, any successor
Rights Agent may countersign such Rights Certificates either in the name of the
predecessor or in the name of the successor Rights Agent; and in all such cases
such Rights Certificates shall have the full force provided in the Rights
Certificates and in this Agreement.

                (b) In case at any time the name of the Rights Agent shall be
changed and at such time any of the Rights Certificates shall have been
countersigned but not delivered, the Rights Agent may adopt the countersignature
under its prior name and deliver Rights Certificates so countersigned; and in
case at that time any of the Rights Certificates shall not have been
countersigned, the Rights Agent may countersign such Rights Certificates either
in its prior name or in its changed name; and in all such cases such Rights
Certificates shall have the full force provided in the Rights Certificates and
in this Agreement.


                                      -25-

<PAGE>   29




        Section 20. Duties of Rights Agent. The Rights Agent undertakes the
duties and obligations imposed by this Agreement upon the following terms and
conditions, by all of which the Company and the holders of Rights Certificates,
by their acceptance thereof, shall be bound:

                (a) The Rights Agent may consult with legal counsel (who may be
legal counsel for the Company), and the opinion of such counsel shall be full
and complete authorization and protection to the Rights Agent as to any action
taken or omitted by it in good faith and in accordance with such opinion.

                (b) Whenever in the performance of its duties under this
Agreement the Rights Agent shall deem it necessary or desirable that any fact or
matter (including, without limitation, the identity of any Acquiring Person and
the determination of "current market price") be proved or established by the
Company prior to taking or suffering any action hereunder, such fact or matter
(unless other evidence in respect thereof be herein specifically prescribed) may
be deemed to be conclusively proved and established by a certificate signed by
the Chairman of the Board, the President, any Vice President, the Treasurer, any
Assistant Treasurer, the Secretary or any Assistant Secretary of the Company and
delivered to the Rights Agent; and such certificate shall be full authorization
to the Rights Agent for any action taken or suffered in good faith by it under
the provisions of this Agreement in reliance upon such certificate.

                (c) The Rights Agent shall be liable hereunder only for its own
gross negligence, bad faith or intentional misconduct. In no case, however, will
the Rights Agent be liable for special, indirect, incidental or consequential
loss or damages of any kind whatsoever (including but not limited to lost
profits), even if the Rights Agent has been advised of the possibility of such
damages.

                (d) The Rights Agent shall not be liable for or by reason of any
of the statements of fact or recitals contained in this Agreement or in the
Rights Certificates or be required to verify the same (except as to its
countersignature on such Rights Certificates), but all such statements and
recitals are and shall be deemed to have been made by the Company only.

                (e) The Rights Agent shall not be under any responsibility in
respect of the validity of this Agreement or the execution and delivery hereof
(except the due execution hereof by the Rights Agent) or in respect of the
validity or execution of any Rights Certificate (except its countersignature
thereof); nor shall it be responsible for any breach by the Company of any
covenant or condition contained in this Agreement or in any Rights Certificate;
nor shall it be responsible for any adjustment required under the provisions of
Section 11 or Section 13 hereof or responsible for the manner, method or amount
of any such adjustment or the ascertaining of the existence of facts that would
require any such adjustment (except with respect to the exercise of Rights
evidenced by Rights Certificates after actual notice of any such adjustment);
nor shall it by any act hereunder be deemed to make any representation or
warranty as to the authorization or reservation of any shares of Common Stock or
Preferred Stock to be issued pursuant to this Agreement or any Rights
Certificate or as to whether any shares of Common Stock or Preferred Stock will,
when so issued, be validly authorized and issued, fully paid and nonassessable.


                                      -26-

<PAGE>   30




                (f) The Company agrees that it will perform, execute,
acknowledge and deliver or cause to be performed, executed, acknowledged and
delivered all such further and other acts, instruments and assurances as may
reasonably be required by the Rights Agent for the carrying out or performing by
the Rights Agent of the provisions of this Agreement.

                (g) The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from the
Chairman of the Board, the President, any Vice President, the Secretary, any
Assistant Secretary, the Treasurer or any Assistant Treasurer of the Company,
and to apply to such officers for advice or instructions in connection with its
duties, and it shall not be liable for any action taken or suffered to be taken
by it in good faith in accordance with instructions of any such officer.

                (h) The Rights Agent and any stockholder, director, officer or
employee of the Rights Agent may buy, sell or deal in any of the Rights or other
securities of the Company or become pecuniarily interested in any transaction in
which the Company may be interested, or contract with or lend money to the
Company or otherwise act as fully and freely as though it were not Rights Agent
under this Agreement. Nothing herein shall preclude the Rights Agent from acting
in any other capacity for the Company or for any other legal entity.

                (i) The Rights Agent may execute and exercise any of the rights
or powers hereby vested in it or perform any duty hereunder either itself or by
or through its attorneys or agents, and the Rights Agent shall not be answerable
or accountable for any act, default, neglect or misconduct of any such attorneys
or agents or for any loss to the Company resulting from any such act, default,
neglect or misconduct; provided, however, reasonable care was exercised in the
selection and continued employment thereof.

                (j) No provision of this Agreement shall require the Rights
Agent to expend or risk its own funds or otherwise incur any financial liability
in the performance of any of its duties hereunder or in the exercise of its
rights if there shall be reasonable grounds for believing that repayment of such
funds or adequate indemnification against such risk or liability is not
reasonably assured to it.

                (k) If, with respect to any Right Certificate surrendered to the
Rights Agent for exercise or transfer, the certificate attached to the form of
assignment or form of election to purchase, as the case may be, has either not
been completed or indicates an affirmative response to clause 1 and/or 2
thereof, the Rights Agent shall not take any further action with respect to such
requested exercise of transfer without first consulting with the Company.

        Section 21. Change of Rights Agent. The Rights Agent or any successor
Rights Agent may resign and be discharged from its duties under this Agreement
upon thirty (30) days' notice in writing mailed to the Company, and to each
transfer agent of the Common Stock and Preferred Stock, by registered or
certified mail, and to the holders of the Rights Certificates by first-class
mail. The Company may remove the Rights Agent or any successor Rights Agent upon
thirty (30) days' notice in writing, mailed to the Rights Agent or successor
Rights Agent, as the case may be, and to each transfer agent of the Common Stock
and Preferred Stock, by registered or certified

                                      -27-

<PAGE>   31




mail, and to the holders of the Rights Certificates by first-class mail. If the
Rights Agent shall resign or be removed or shall otherwise become incapable of
acting, the Company shall appoint a successor to the Rights Agent. If the
Company shall fail to make such appointment within a period of thirty (30) days
after giving notice of such removal or after it has been notified in writing of
such resignation or incapacity by the resigning or incapacitated Rights Agent or
by the holder of a Rights Certificate (who shall, with such notice, submit his
Rights Certificate for inspection by the Company), then any registered holder of
any Rights Certificate may apply to any court of competent jurisdiction for the
appointment of a new Rights Agent. Any successor Rights Agent, whether appointed
by the Company or by such a court, shall be either (a) a corporation organized
and doing business under the laws of the United States or of the State of New
York (or of any other state of the United States so long as such corporation is
authorized to do business as a banking institution in the State of New York), in
good standing, having a principal office in the State of New York, which is
authorized under such laws to exercise corporate trust or stock transfer powers
and is subject to supervision or examination by federal or state authority and
which either has or is an affiliate of a corporation which has at the time of
its appointment as Rights Agent a combined capital and surplus of at least
$100,000,000, or (b) an affiliate of such a corporation. After appointment, the
successor Rights Agent shall be vested with the same powers, rights, duties and
responsibilities as if it had been originally named as Rights Agent without
further act or deed; but the predecessor Rights Agent shall deliver and transfer
to the successor Rights Agent any property at the time held by it hereunder, and
execute and deliver any further assurance, conveyance, act or deed necessary for
the purpose. Not later than the effective date of any such appointment, the
Company shall file notice thereof in writing with the predecessor Rights Agent
and each transfer agent of the Common Stock and the Preferred Stock, and mail a
notice thereof in writing to the registered holders of the Rights Certificates.
Failure to give any notice provided for in this Section 21, however, or any
defect therein, shall not affect the legality or validity of the resignation or
removal of the Rights Agent or the appointment of the successor Rights Agent, as
the case may be.

        Section 22. Issuance of New Rights Certificates. Notwithstanding any of
the provisions of this Agreement or of the Rights to the contrary, the Company
may, at its option, issue new Rights Certificates evidencing Rights in such form
as may be approved by its Board of Directors to reflect any adjustment or change
in the Purchase Price and the number or kind or class of shares or other
securities or property purchasable under the Rights Certificates made in
accordance with the provisions of this Agreement. In addition, in connection
with the issuance or sale of shares of Common Stock following the Distribution
Date and prior to the redemption or expiration of the Rights, the Company (a)
shall, with respect to shares of Common Stock so issued or sold pursuant to the
exercise of stock options or under any employee plan or arrangement, granted or
awarded as of the Distribution Date, or upon the exercise, conversion or
exchange of securities hereinafter issued by the Company, and (b) may, in any
other case, if deemed necessary or appropriate by the Board of Directors of the
Company, issue Rights Certificates representing the appropriate number of Rights
in connection with such issuance or sale; provided, however, that (i) no such
Rights Certificate shall be issued if, and to the extent that, the Company shall
be advised by counsel that such issuance would create a significant risk of
material adverse tax consequences to the Company or the Person to whom such
Rights Certificate

                                      -28-

<PAGE>   32




would be issued, and (ii) no such Rights Certificate shall be issued if, and to
the extent that, appropriate adjustment shall otherwise have been made in lieu
of the issuance thereof.

        Section 23. Redemption and Termination.

                (a) The Board of Directors of the Company may, at its option, at
any time prior to the earlier of (i) the close of business on the tenth Business
Day following the Stock Acquisition Date or (ii) the Final Expiration Date,
redeem all but not less than all the then outstanding Rights at a redemption
price of $.001 per Right, as such amount may be appropriately adjusted to
reflect any stock split, stock dividend or similar transaction occurring after
the date hereof (such redemption price being hereinafter referred to as the
"Redemption Price"). Such redemption of the Rights by the Company may be made
effective at such time, on such basis and with such conditions as the Board of
Directors in its sole discretion may establish. Notwithstanding anything
contained in this Agreement to the contrary, the Rights shall not be exercisable
after the occurrence of the Section 11(a)(ii) Event until such time as the
Company's right of redemption hereunder has expired. The Company may, at its
option, pay the Redemption Price in cash, shares of Common Stock (based on the
"current market price," as defined in Section 11(d)(i) hereof, of the Common
Stock at the time of redemption) or any other form of consideration deemed
appropriate by the Board of Directors.

                (b) Immediately upon the action of the Board of Directors of the
Company ordering the redemption of the Rights, evidence of which shall have been
filed with the Rights Agent and without any further action and without any
notice, the right to exercise the Rights will terminate and the only right
thereafter of the holders of Rights shall be to receive the Redemption Price for
each Right so held. Promptly after the action of the Board of Directors ordering
the redemption of the Rights, the Company shall give notice of such redemption
to the Rights Agent and the holders of the then outstanding Rights by mailing
such notice to all such holders at each holder's last address as it appears upon
the registry books of the Rights Agent or, prior to the Distribution Date, on
the registry books of the transfer agent for the Common Stock. Any notice which
is mailed in the manner herein provided shall be deemed given, whether or not
the holder receives the notice. Each such notice of redemption will state the
method by which the payment of the Redemption Price will be made.

        Section 24. Notice of Certain Events.

                (a) In case the Company shall propose, at any time after the
Distribution Date, (i) to pay any dividend payable in stock of any class to the
holders of Preferred Stock or to make any other distribution to the holders of
Preferred Stock (other than a regular quarterly cash dividend out of earnings or
retained earnings of the Company), or (ii) to offer to the holders of Preferred
Stock rights or warrants to subscribe for or to purchase any additional shares
of Preferred Stock or shares of stock of any class or any other securities,
rights or options, or (iii) to effect any reclassification of its Preferred
Stock (other than a reclassification involving only the subdivision of
outstanding shares of Preferred Stock), or (iv) to effect any consolidation or
merger into or with any other Person (other than a Subsidiary of the Company in
a transaction which complies with Section 11(o) hereof), or to effect any sale
or other transfer (or to permit one or

                                      -29-

<PAGE>   33




more of its Subsidiaries to effect any sale or other transfer), in one
transaction or a series of related transactions, of more than 50% of the assets
or earning power of the Company and its Subsidiaries (taken as a whole) to any
other Person or Persons (other than the Company and/or any of its Subsidiaries
in one or more transactions each of which complies with Section 11(o) hereof),
or (v) to effect the liquidation, dissolution or winding up of the Company,
then, in each such case, the Company shall give to each holder of a Rights
Certificate, to the extent feasible and in accordance with Section 25 hereof, a
notice of such proposed action, which shall specify the record date for the
purposes of such stock dividend, distribution of rights or warrants, or the date
on which such reclassification, consolidation, merger, sale, transfer,
liquidation, dissolution, or winding up is to take place and the date of
participation therein by the holders of the shares of Preferred Stock, if any
such date is to be fixed, and such notice shall be so given in the case of any
action covered by clause (i) or (ii) above at least twenty (20) days prior to
the record date for determining holders of the shares of Preferred Stock for
purposes of such action, and in the case of any such other action, at least
twenty (20) days prior to the date of the taking of such proposed action or the
date of participation therein by the holders of the shares of Preferred Stock
whichever shall be the earlier.

                (b) In case the Section 11(a)(ii) Event shall occur, (i) the
Company shall as soon as practicable thereafter give to each holder of a Rights
Certificate, to the extent feasible and in accordance with Section 25 hereof, a
notice of the occurrence of such event, which shall specify the event and the
consequences of the event to holders of Rights under Section 11(a)(ii) hereof,
and (ii) all references in the preceding paragraph to Preferred Stock shall be
deemed thereafter to refer to Common Stock and/or, if appropriate, other
securities.

        Section 25. Notices. Notices or demands authorized by this Agreement to
be given or made by the Rights Agent or by the holder of any Rights Certificate
to or on the Company shall be sufficiently given or made if sent by first-class
mail, postage prepaid, addressed (until another address is filed in writing with
the Rights Agent) as follows:

                  Eagle Geophysical, Inc.
                  50 Briar Hollow Lane, 6th Floor West
                  Houston, Texas 77027
                  Attention: Corporate Secretary

Subject to the provisions of Section 21, any notice or demand authorized by this
Agreement to be given or made by the Company or by the holder of any Rights
Certificate to or on the Rights Agent shall be sufficiently given or made if
sent by first-class mail, postage prepaid, addressed (until another address is
filed in writing with the Company) as follows:

                  ChaseMellon Shareholder Services, L.L.C.
                  450 W. 33rd
                  New York, New York 10001
                  Attention: Vice President



                                      -30-

<PAGE>   34




Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Rights Certificate (or, if
prior to the Distribution Date, to the holder of certificates representing
shares of Common Stock) shall be sufficiently given or made if sent by
first-class mail, postage prepaid, addressed to such holder at the address of
such holder as shown on the registry books of the Company.

        Section 26. Supplements and Amendments. Prior to the Distribution Date
and subject to the penultimate sentence of this Section 26, the Company and the
Rights Agent shall, if the Company so directs, supplement or amend any provision
of this Agreement without the approval of any holders of certificates
representing shares of Common Stock. From and after the Distribution Date and
subject to the penultimate sentence of this Section 26, the Company and the
Rights Agent shall, if the Company so directs, supplement or amend this
Agreement without the approval of any holders of Rights Certificates in order
(i) to cure any ambiguity, (ii) to correct or supplement any provision contained
herein which may be defective or inconsistent with any other provisions herein,
(iii) to shorten or lengthen any time period hereunder, or (iv) to change or
supplement the provisions hereunder in any manner which the Company may deem
necessary or desirable and which shall not adversely affect the interests of the
holders of Rights Certificates (other than an Acquiring Person or an Affiliate
or Associate of an Acquiring Person); provided, this Agreement may not be
supplemented or amended to lengthen, pursuant to clause (iii) of this sentence,
(A) a time period relating to when the Rights may be redeemed at such time as
the Rights are not then redeemable, or (B) any other time period unless such
lengthening is for the purpose of protecting, enhancing or clarifying the rights
of, and/or the benefits to, the holders of Rights. Upon the delivery of a
certificate from an appropriate officer of the Company which states that the
proposed supplement or amendment is in compliance with the terms of this Section
26, the Rights Agent shall execute such supplement or amendment. Notwithstanding
anything contained in this Agreement to the contrary, no supplement or amendment
shall be made which changes the Redemption Price, the Final Expiration Date, the
Purchase Price or the number of one one-thousandths of a share of Preferred
Stock for which a Right is exercisable; provided, however, that at any time
prior to (i) the Stock Acquisition Date or (ii) the date that a tender or
exchange offer by any Person (other than the Company, any Subsidiary of the
Company, any employee benefit plan of the Company or any Subsidiary of the
Company, or any Person or entity organized, appointed or established by the
Company for or pursuant to the terms of any such plan) is first published or
sent or given within the meaning of Rule 14d-2(a) of the General Rules and
Regulations under the Exchange Act, if upon consummation thereof, such Person
would be the Beneficial Owner of 15 % or more of the shares of Common Stock then
outstanding and if at the time of any amendment or supplement such tender or
exchange offer has not expired or been terminated, the Board of Directors of the
Company may amend this Agreement to increase the Purchase Price or extend the
Final Expiration Date. Prior to the Distribution Date, the interests of the
holders of Rights shall be deemed coincident with the interests of the holders
of Common Stock.

        Section 27. Successors. All the covenants and provisions of this
Agreement by or for the benefit of the Company or the Rights Agent shall bind
and inure to the benefit of their respective successors and assigns hereunder.


                                      -31-

<PAGE>   35




        Section 28. Determinations and Actions by the Board of Directors, etc.
For all purposes of this Agreement, any calculation of the number of shares of
Common Stock outstanding at any particular time, including for purposes of
determining the particular percentage of such outstanding shares of Common Stock
of which any Person is the Beneficial Owner, shall be made in accordance with
the last sentence of Rule 13d-3(d)(1)(i) of the General Rules and Regulations
under the Exchange Act. The Board of Directors of the Company shall have the
exclusive power and authority to administer this Agreement and to exercise all
rights and powers specifically granted to the Board or to the Company, or as may
be necessary or advisable in the administration of this Agreement, including,
without limitation, the right and power to (i) interpret the provisions of this
Agreement, and (ii) make all determinations deemed necessary or advisable for
the administration of this Agreement (including a determination to redeem or not
redeem the Rights or to amend the Agreement). All such actions, calculations,
interpretations and determinations (including, for purposes of clause (y) below,
all omissions with respect to the foregoing) which are done or made by the Board
in good faith, shall (x) be final, conclusive and binding on the Company, the
Rights Agent, the holders of the Rights and all other parties, and (y) not
subject the Board to any liability to the holders of the Rights.

        Section 29. Benefits of this Agreement. Nothing in this Agreement shall
be construed to give to any Person other than the Company, the Rights Agent and
the registered holders of the Rights Certificates (and, prior to the
Distribution Date, registered holders of the Common Stock) any legal or
equitable right, remedy or claim under this Agreement; but this Agreement shall
be for the sole and exclusive benefit of the Company, the Rights Agent and the
registered holders of the Rights Certificates (and, prior to the Distribution
Date, registered holders of the Common Stock).

        Section 30. Severability. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated;
provided, however, that notwithstanding anything in this Agreement to the
contrary, if any such term, provision, covenant or restriction is held by such
court or authority to be invalid, void or unenforceable and the Board of
Directors of the Company determines in its good faith judgment that severing the
invalid language from this Agreement would adversely affect the purpose or
effect of this Agreement, the right of redemption set forth in Section 23 hereof
shall be reinstated and shall not expire until the close of business on the
tenth Business Day following the date of such determination by the Board of
Directors.

        Section 31. Governing Law. This Agreement, each Right and each Rights
Certificate issued hereunder shall be deemed to be a contract made under the
laws of the State of Delaware and for all purposes shall be governed by and
construed in accordance with the laws of such State applicable to contracts made
and to be performed entirely within such State; provided, however, that all
provisions providing regarding the rights, duties and obligations of the Rights
Agent shall be governed by and construed in accordance with the laws of the
State of New York applicable to contracts made and to be performed entirely with
such State.


                                      -32-

<PAGE>   36




        Section 32. Counterparts. This Agreement may be executed in any number
of counterparts and each of such counterparts shall for all purposes be deemed
to be an original, and all such counterparts shall together constitute but one
and the same instrument.

        Section 33. Descriptive Headings. Descriptive headings of the several
Sections of this Agreement are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.

        IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and their respective corporate seals to be hereunto affixed and
attested, all as of the day and year first above written.

Attest:                                   EAGLE GEOPHYSICAL, INC.


By /S/ RICHARD W. MCNAIRY                 By /S/ JAY N. SILVERMAN
  ------------------------------                ------------------------------
Name:  Richard W. McNairy                        Jay N. Silverman, President
     ---------------------------                 and Chief Executive Officer
Title: CFO                                      
      --------------------------


Attest:                                   CHASEMELLON SHAREHOLDER SERVICES,
                                          L.L.C.


By                                        By /S/ JANIS E. DAUGHERTY
   -----------------------------             ---------------------------------
Name:                                        Janis E. Daugherty, 
     ---------------------------             Relationship Manager
Title:                                       
      -------------------------- 

                                      -33-

<PAGE>   37




                                                                      Exhibit A

               CERTIFICATE OF DESIGNATIONS OF RIGHTS, PREFERENCES
                                AND PRIVILEGES OF
                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK
                           OF EAGLE GEOPHYSICAL, INC.

   The undersigned, Jay N. Silverman and Richard W. McNairy do hereby certify:

        1.  That they are the duly elected and acting President and Secretary,
respectively, of Eagle Geophysical, Inc., a Delaware corporation (the
"Corporation").

        2.  That pursuant to the authority conferred upon the Board of Directors
by the Certificate of Incorporation of the said Corporation, the said Board of
Directors on August 4, 1998 adopted the following resolution creating a series
of 100,000 shares of Preferred Stock designated as Series A Junior Participating
Preferred Stock:

        "RESOLVED, that pursuant to the authority vested in the Board of
Directors of the corporation by the Certificate of Incorporation, the Board of
Directors does hereby provide for the issue of a series of Preferred Stock of
the Corporation and does hereby fix and herein state and express the
designations, powers, preferences and relative and other special rights and the
qualifications, limitations and restrictions of such series of Preferred Stock
as follows:

        1.  Designation and Amount. The shares of such series shall be
designated as "Series A Junior Participating Preferred Stock," par value $.01
per share (the "Series A Junior Preferred Stock"), and the number of shares
constituting such series shall be 100,000.

        2.  Dividends and Distributions. (a) Subject to the prior and superior
rights of the holders of any shares of any series of Preferred Stock ranking
prior and superior to the shares of Series A Junior Preferred Stock with respect
to dividends, the holders of shares of Series A Junior Preferred Stock in
preference to the holders of Common Stock and of any other junior stock, shall
be entitled to receive, when, as and if declared by the Board of Directors out
of funds legally available therefor, dividends payable quarterly on the first
day of January, April, July and October (each such date being referred to herein
as a "Quarterly Dividend Payment Date"), commencing on the first Quarterly
Dividend Payment Date after the first issuance of a share or fraction of a share
of Series A Junior Preferred Stock, in an amount per share (rounded to the
nearest cent) equal to the greater of (a) $1.00 or (b) subject to the provision
for adjustment hereinafter set forth, 1,000 times the aggregate per share amount
of all cash dividends, and 1,000 times the aggregate per share amount (payable
in kind) of all non-cash dividends or other distributions other than a dividend
payable in shares of Common Stock or a subdivision of the outstanding shares of
Common Stock (by reclassification or otherwise), declared on the Common Stock,
since the immediately preceding Quarterly Dividend Payment Date, or, with
respect to the first Quarterly Dividend Payment Date, since the first issuance
of any share or fraction of a share of Series A Junior Preferred Stock. In the
event the Corporation shall at any time after the record date for the

                                       A-1

<PAGE>   38




initial distribution of the Corporation's Preferred Stock Purchase Rights
pursuant to the Rights Agreement between the Corporation and ChaseMellon
Shareholder Services, L.L.C., as Rights Agent (the "Rights Declaration Date"),
(i) declare any dividend on Common Stock payable in shares of Common Stock, (ii)
subdivide the outstanding Common Stock, or (iii) combine the outstanding Common
Stock into a smaller number of shares, then in each such case the amount to
which holders of shares of Series A Junior Preferred Stock were entitled
immediately prior to such event under clause (b) of the preceding sentence shall
be adjusted by multiplying such amount by a fraction, the numerator of which is
the number of shares of Common Stock outstanding immediately after such event
and the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

        (b) The Corporation shall declare a dividend or distribution on the
Series A Junior Preferred Stock as provided in paragraph (a) above immediately
after it declares a dividend or distribution on the Common Stock (other than a
dividend payable in shares of Common Stock); provided that, in the event no
dividend or distribution shall have been declared on the Common Stock during the
period between any Quarterly Dividend Payment Date and the next subsequent
Quarterly Dividend Payment Date, a dividend of $1.00 per share on the Series A
Junior Preferred Stock shall nevertheless be payable on such subsequent
Quarterly Dividend Payment Date.

        (c) Dividends shall begin to accrue and be cumulative on outstanding
shares of Series A Junior Preferred Stock from the Quarterly Dividend Payment
Date next preceding the date of issue of such shares of Series A Junior
Preferred Stock, unless the date of issue of such shares is prior to the record
date for the first Quarterly Dividend Payment Date, in which case dividends on
such shares shall begin to accrue from the date of issue of such shares, or
unless the date of issue is a Quarterly Dividend Payment Date or is a date after
the record date for the determination of holders of shares of Series A Junior
Preferred Stock entitled to receive a quarterly dividend and before such
Quarterly Dividend Payment Date, in either of which events such dividends shall
begin to accrue and be cumulative from such Quarterly Dividend Payment Date.
Accrued but unpaid dividends shall not bear interest. Dividends paid on the
shares of Series A Junior Preferred Stock in an amount less than the total
amount of such dividends at the time accrued and payable on such shares shall be
allocated pro rata on a share-by-share basis among all such shares at the time
outstanding. The Board of Directors may fix a record date for the determination
of holders of shares of Series A Junior Preferred Stock entitled to receive
payment of a dividend or distribution declared thereon, which record date shall
be no more than 60 days prior to the date fixed for the payment thereof.

        3.  Voting Rights. The holders of shares of Series A Junior Preferred
Stock shall have the following voting rights:

        (a) Subject to the provision for adjustment hereinafter set forth, each
share of Series A Junior Preferred Stock shall entitle the holder thereof to
1,000 votes on all matters submitted to a vote of the stockholders of the
Corporation. In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding

                                       A-2

<PAGE>   39




Common Stock into a smaller number of shares, then in each such case the number
of votes per share to which holders of shares of Series A Junior Preferred Stock
were entitled immediately prior to such event shall be adjusted by multiplying
such number by a fraction, the numerator of which is the number of shares of
Common Stock outstanding immediately after such event and the denominator of
which is the number of shares of Common Stock that were outstanding immediately
prior to such event.

        (b) Except as otherwise provided herein, or under applicable law, the
holders of shares of Series A Junior Preferred Stock and the holders of shares
of Common Stock shall vote together as one class on all matters submitted to a
vote of stockholders of the Corporation.

        (c) Except as set forth herein or as otherwise provided in the
Certificate of Incorporation, holders of Series A Junior Preferred Stock shall
have no special voting rights and their consent shall not be required (except to
the extent they are entitled to vote with holders of Common Stock as set forth
herein) for taking any corporate action.

        4. Certain Restrictions. (a) Whenever quarterly dividends or other
dividends or distributions payable on the Series A Junior Preferred Stock as
provided in Section 2 are in arrears, thereafter and until all accrued and
unpaid dividends and distributions, whether or not declared, on shares of Series
A Junior Preferred Stock outstanding shall have been paid in full, the
Corporation shall not:

                (i) declare or pay or set apart for payment any dividends or
         make any other distributions on, or redeem or purchase or otherwise
         acquire, directly or indirectly, for consideration any shares of any
         class of stock of the Corporation ranking junior (either as to
         dividends or upon liquidation, dissolution or winding up) to the Series
         A Junior Preferred Stock;

                (ii) declare or pay dividends on or make any other distributions
         on any shares of stock ranking on a parity (either as to dividends or
         upon liquidation, dissolution or winding up) with the Series A Junior
         Preferred Stock, except dividends paid ratably on the Series A Junior
         Preferred Stock and all such parity stock on which dividends are
         payable or in arrears in proportion to the total amounts to which the
         holders of all such shares are then entitled;

                (iii) redeem or purchase or otherwise acquire for consideration
         shares of any stock ranking on a parity (either as to dividends or upon
         liquidation, dissolution or winding up) with the Series A Junior
         Preferred Stock, provided that the Corporation may at any time redeem,
         purchase or otherwise acquire shares of any such parity stock in
         exchange for shares of any stock of the Corporation ranking junior
         (either as to dividends or upon dissolution, liquidation or winding up)
         to the Series A Junior Preferred Stock; or

                (iv) purchase or otherwise acquire for consideration any shares
         of Series A Junior Preferred Stock, or any shares of stock ranking on a
         parity with the Series A Junior

                                       A-3

<PAGE>   40




         Preferred Stock, except in accordance with a purchase offer made in
         writing or by publication (as determined by the Board of Directors) to
         all holders of such shares upon such terms as the Board of Directors,
         after consideration of the respective annual dividend rates and other
         relative rights and preferences of the respective series and classes,
         shall determine in good faith will result in fair and equitable
         treatment among the respective series or classes.

        (b) The Corporation shall not permit any subsidiary of the Corporation
to purchase or otherwise acquire for consideration any shares of stock of the
Corporation unless the Corporation could, under paragraph (a) of this Section 4,
purchase or otherwise acquire such shares at such time and in such manner.

        5. Reacquired Shares. Any shares of Series A Junior Preferred Stock
purchased or otherwise acquired by the Corporation in any manner whatsoever
shall be retired and cancelled promptly after the acquisition thereof. All such
shares shall upon their cancellation become authorized but unissued shares of
Preferred Stock and may be reissued as part of a new series of Preferred Stock
to be created by resolution or resolutions of the Board of Directors, subject to
the conditions and restrictions on issuance set forth herein.

        6. Liquidation, Dissolution or Winding Up. (a) Upon any voluntary or
involuntary liquidation, dissolution or winding up of the Corporation, no
distribution shall be made to the holders of shares of stock ranking junior
(either as to dividends or upon liquidation, dissolution or winding up) to the
Series A Junior Preferred Stock unless, prior thereto, the holders of shares of
Series A Junior Preferred Stock shall have received an amount equal to 1,000
times the par value per share, plus an amount equal to accrued and unpaid
dividends and distributions thereon, whether or not declared, to the date of
such payment (the "Series A Liquidation Preference"). Following the payment of
the full amount of the Series A Liquidation Preference, no additional
distributions shall be made to the holders of shares of Series A Junior
Preferred Stock unless, prior thereto, the holders of shares of Common Stock
shall have received an amount per share (the "Common Adjustment") equal to the
quotient obtained by dividing (i) the Series A Liquidation Preference by (ii)
1,000 (as appropriately adjusted as set forth in paragraph (c) below to reflect
such events as stock splits, stock dividends and recapitalizations with respect
to the Common Stock) (such number in clause (ii) being hereinafter referred to
as the "Adjustment Number"). Following the payment of the full amount of the
Series A Liquidation Preference and the Common Adjustment in respect of all
outstanding shares of Series A Junior Preferred Stock and Common Stock,
respectively, holders of Series A Junior Preferred Stock and holders of shares
of Common Stock shall receive their ratable and proportionate share of the
remaining assets to be distributed in the ratio of the Adjustment Number to 1
with respect to such Series A Junior Preferred Stock and Common Stock, on a per
share basis, respectively.

        (b) In the event, however, that there are not sufficient assets
available to permit payment in full of the Series A Liquidation Preference and
the liquidation preferences of all other series of Preferred Stock, if any,
which rank on a parity with the Series A Junior Preferred Stock, then such
remaining assets shall be distributed ratably to the holders of all such shares
in

                                       A-4

<PAGE>   41




proportion to their respective liquidation preferences. In the event, however,
that there are not sufficient assets available to permit payment in full of the
Common Adjustment, then such remaining assets shall be distributed ratably to
the holders of Common Stock.

        (c) In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the Adjustment Number in effect immediately prior to such event shall be
adjusted by multiplying such Adjustment Number by a fraction, the numerator of
which is the number of shares of Common Stock outstanding immediately after such
event and the denominator of which is the number of shares of Common Stock that
were outstanding immediately prior to such event.

        7. Consolidation, Merger, Share Exchange, etc. In case the Corporation
shall enter into any consolidation, merger, share exchange, combination or other
transaction in which the shares of Common Stock are exchanged for or changed
into other stock or securities, cash and/or any other property, then in any such
case the shares of Series A Junior Preferred Stock shall at the same time be
similarly exchanged or changed in an amount per share (subject to the provision
for adjustment hereinafter set forth) equal to 1,000 times the aggregate amount
of stock, securities, cash and/or any other property (payable in kind), as the
case may be, into which or for which each share of Common Stock is changed or
exchanged. In the event the Corporation shall at any time after the Rights
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the amount set forth in the preceding sentence with respect to the exchange or
change of shares of Series A Junior Preferred Stock shall be adjusted by
multiplying such amount by a fraction, the numerator of which is the number of
shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

        8. No Redemption. The shares of Series A Junior Preferred Stock shall
not be redeemable.

        9. Ranking. The Series A Junior Preferred Stock shall rank junior to all
other series of the Corporation's Preferred Stock as to the payment of dividends
and the distribution of assets, unless the terms of any such series shall
provide otherwise.

        10. Amendment. The Certificate of Incorporation shall not be amended in
any manner which would materially alter or change the powers, preferences or
special rights of the Series A Junior Preferred Stock so as to affect them
adversely without the affirmative vote of the holders of two-thirds or more of
the outstanding shares of Series A Junior Preferred Stock, voting together as a
single voting group.


                                       A-5

<PAGE>   42




        11. Fractional Shares. Series A Junior Preferred Stock may be issued in
fractions of a share which shall entitle the holder, in proportion to such
holder's fractional shares, to exercise voting rights, receive dividends,
participate in distributions and to have the benefit of all other rights of
holders of Series A Junior Preferred Stock.


                                       A-6

<PAGE>   43




                                                                      Exhibit B

                          [Form of Rights Certificate]


Certificate No. R-                                            __________ Rights


        NOT EXERCISABLE AFTER SEPTEMBER ___, 2008 OR EARLIER IF REDEEMED BY THE
        COMPANY. THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE OPTION OF THE
        COMPANY, AT $.001 PER RIGHT ON THE TERMS SET FORTH IN THE RIGHTS
        AGREEMENT. UNDER CERTAIN CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED BY AN
        ACQUIRING PERSON (AS SUCH TERM IS DEFINED IN THE RIGHTS AGREEMENT) AND
        ANY SUBSEQUENT HOLDER OF SUCH RIGHTS MAY BECOME NULL AND VOID. [THE
        RIGHTS REPRESENTED BY THIS RIGHTS CERTIFICATE ARE OR WERE BENEFICIALLY
        OWNED BY A PERSON WHO WAS OR BECAME AN ACQUIRING PERSON OR AN AFFILIATE
        OR ASSOCIATE OF AN ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN THE
        RIGHTS AGREEMENT). ACCORDINGLY, THIS RIGHTS CERTIFICATE AND THE RIGHTS
        REPRESENTED HEREBY MAY BECOME NULL AND VOID IN THE CIRCUMSTANCES
        SPECIFIED IN SECTION 7(e) OF SUCH AGREEMENT.](1)



                               Rights Certificate

                             EAGLE GEOPHYSICAL, INC.


        This certifies that           , or registered assigns, is the registered
owner of the number of Rights set forth above, each of which entitles the owner
thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of August ___, 1998 (the "Rights Agreement"), between Eagle
Geophysical, Inc., a Delaware corporation (the "Company"), and ChaseMellon
Shareholder Services, L.L.C., a limited liability company organized under the
laws of State of ________________ (the "Rights Agent"), to purchase from the
Company at any time prior to 5:00 P.M. (New York City time) on September ___,
2008 at the office or offices of the Rights Agent designated for such purpose,
or its successors as Rights Agent, one one-thousandth of a fully paid,
nonassessable share of Series A Junior Participating Preferred Stock (the
"Preferred Stock") of the Company, at a purchase price of $______ per one
one-thousandth

- -------------
        (1) The portion of the legend in brackets shall be inserted only if
applicable and shall replace the preceding sentence.

                                      B-1
<PAGE>   44




of a share (the "Purchase Price"), upon presentation and surrender of this
Rights Certificate with the Form of Election to Purchase and related Certificate
duly executed. The Purchase Price shall be paid, at the election of the holder,
in cash or shares of Common Stock of the Company having an equivalent value. The
number of Rights evidenced by this Rights Certificate (and the number of shares
which may be purchased upon exercise thereof) set forth above, and the Purchase
Price per share set forth above, are the number and Purchase Price as of
September ___, 1998, based on the Preferred Stock as constituted at such date.

        Upon the occurrence of the Section 11(a)(ii) Event (as such term is
defined in the Rights Agreement), if the Rights evidenced by this Rights
Certificate are beneficially owned by (i) an Acquiring Person or an Affiliate or
Associate of any such Acquiring Person (as such terms are defined in the Rights
Agreement), (ii) a transferee of any such Acquiring Person, Associate or
Affiliate, or (iii) under certain circumstances specified in the Rights
Agreement, a transferee of a person who, after such transfer, became an
Acquiring Person, or an Affiliate or Associate of an Acquiring Person, such
Rights shall become null and void and no holder hereof shall have any right with
respect to such Rights from and after the occurrence of the Section 11(a)(ii)
Event.

        As provided in the Rights Agreement, the Purchase Price and the number
and kind of shares of Preferred Stock or other securities, which may be
purchased upon the exercise of the Rights evidenced by this Rights Certificate
are subject to modification and adjustment upon the happening of certain events,
including Triggering Events.

        This Rights Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, which limitations of rights include the temporary suspension of
the exercisability of such Rights under the specific circumstances set forth in
the Rights Agreement. Copies of the Rights Agreement are on file at the
above-mentioned office of the Rights Agent and are also available upon written
request to the Rights Agent.

        This Rights Certificate, with or without other Rights Certificates, upon
surrender at the principal office or offices of the Rights Agent designated for
such purpose, may be exchanged for another Rights Certificate or Rights
Certificates of like tenor and date evidencing Rights entitling the holder to
purchase a like aggregate number of one one-thousandths of a share of Preferred
Stock as the Rights evidenced by the Rights Certificate or Rights Certificates
surrendered shall have entitled such holder to purchase. If this Rights
Certificate shall be exercised in part, the holder shall be entitled to receive
upon surrender hereof another Rights Certificate or Rights Certificates for the
number of whole Rights not exercised.

        Subject to the provisions of the Rights Agreement, the Rights evidenced
by this Certificate may be redeemed by the Company at its option at a redemption
price of $.001 per Right at any time prior to the earlier of the close of
business on (i) the tenth Business Day following the Stock Acquisition Date (as
such time period may be extended pursuant to the Rights Agreement), and (ii) the
Final Expiration Date.

                                       B-2

<PAGE>   45




        The Company is not required to issue fractional shares of Preferred
Stock upon the exercise of any Right or Rights evidenced hereby (other than
fractions which are integral multiples of one one-thousandth of a share of
Preferred Stock, which may, at the election of the Company, be evidenced by
depositary receipts), but in lieu thereof a cash payment may be made, as
provided in the Rights Agreement.

        No holder of this Rights Certificate shall be entitled to vote or
receive dividends or be deemed for any purpose the holder of shares of Preferred
Stock or of any other securities of the Company which may at any time be
issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Company or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or, to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or subscription
rights, or otherwise, until the Right or Rights evidenced by this Rights
Certificate shall have been exercised as provided in the Rights Agreement.

        This Rights Certificate shall not be valid or obligatory for any purpose
until it shall have been countersigned by the Rights Agent.

        WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal.


Dated as of 
           --------,-----

Attest:                                 EAGLE GEOPHYSICAL, INC.


By                                      By
  ----------------------------            --------------------------------
Name:                                   Name: 
     -------------------------               -----------------------------
Title:                                  Title: 
      ------------------------                ----------------------------


Countersigned:

CHASEMELLON SHAREHOLDER SERVICES, L.L.C.


By
  ----------------------------
      Authorized Signature



                                       B-3

<PAGE>   46




                  [Form of Reverse Side of Rights Certificate]


                               FORM OF ASSIGNMENT

                (To be executed by the registered holder if such
              holder desires to transfer the Rights Certificate.)


FOR VALUE RECEIVED 
                  -------------------------------------------------------------
hereby sells, assigns and transfers unto
                                        ---------------------------------------
- -------------------------------------------------------------------------------
                  (Please print name and address of transferee)

- -------------------------------------------------------------------------------
this Rights Certificate, together with all right, title and interest therein,
and does hereby irrevocably constitute and appoint __________________ Attorney,
to transfer the within Rights Certificate on the books of the within-named
Company, with full power of substitution.


Date:
     -------------,------

                                        ---------------------------------------
                                                     Signature


Signature Guaranteed:






                                       B-4

<PAGE>   47




                                   Certificate


       The undersigned hereby certifies by checking the appropriate boxes
that:

                (1) this Rights Certificate [ ] is [ ] is not being sold,
assigned and transferred by or on behalf of a Person who is or was an Acquiring
Person or an Affiliate or Associate of any such Acquiring Person (as such terms
are defined pursuant to the Rights Agreement); and

                (2) after due inquiry and to the best knowledge of the
undersigned, it [ ] did [ ]did not acquire the Rights evidenced by this Rights
Certificate from any Person who is, was or subsequently became an Acquiring
Person or an Affiliate or Associate of an Acquiring Person.


Dated:
      -------------,------              ---------------------------------------
                                                       Signature

Signature Guaranteed:


                                     NOTICE


                The signature to the foregoing Assignment and Certificate must
correspond to the name as written upon the face of this Rights Certificate in
every particular, without alteration or enlargement or an change whatsoever.




                                       B-5

<PAGE>   48




                          FORM OF ELECTION TO PURCHASE

       (To be executed if holder desires to exercise Rights represented by
                            the Rights Certificate.)


To: EAGLE GEOPHYSICAL, INC.

        The undersigned hereby irrevocably elects to exercise ____________
Rights represented by this Rights Certificate to purchase the shares of
Preferred Stock issuable upon the exercise of the Rights (or such other
securities of the Company or of any other person which may be issuable upon the
exercise of the Rights) and requests that certificates for such shares be issued
in the name of and delivered to:

Please insert social security
or other identifying number
                           ---------------------------

- -----------------------------------------------------------------------------
                         (Please print name and address)

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


        If such number of Rights shall not be all the Rights evidenced by this
Rights Certificate, a new Rights Certificate for the balance of such Rights
shall be registered in the name of and delivered to:


Please insert social security
or other identifying number
                           ---------------------------


- -----------------------------------------------------------------------------
                         (Please print name and address)

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

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

Dated:
      ------------------,------
                                        ---------------------------------------
                                                       Signature

Signature Guaranteed:



                                       B-6

<PAGE>   49




                                   Certificate

        The undersigned hereby certifies by checking the appropriate boxes that:

        (1) the Rights evidenced by this Rights Certificate [ ] are [ ] are not
being exercised by or on behalf of a Person who is or was an Acquiring Person or
an Affiliate or Associate of any such Acquiring Person (as such terms are
defined pursuant to the Rights Agreement); and

        (2) after due inquiry and to the best knowledge of the undersigned, it
[ ] did [ ] did not acquire the Rights evidenced by this Rights Certificate from
any Person who is, was or became an Acquiring Person or an Affiliate or
Associate of an Acquiring Person.


Dated
     -----------------,------           ---------------------------------------
                                                       Signature


Signature Guaranteed:

                                     NOTICE

            The signature to the foregoing Election to Purchase and Certificate
must correspond to the name as written upon the face of this Rights Certificate
in every particular, without alteration or enlargement or any change whatsoever.





                                       B-7

<PAGE>   50




                                                                      Exhibit C

                          SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES

        On August 4, 1998, the Board of Directors of Eagle Geophysical, Inc.
(the "Company") declared a dividend of one preferred share purchase right (a
"Right") for each outstanding share of common stock, par value $.01 per share
(the "Common Stock"), of the Company. The dividend is payable on August 31, 1998
(the "Record Date"), to the stockholders of record on that date. Each Right
entitles the registered holder to purchase from the Company one one-thousandth
of a share of Series A Junior Participating Preferred Stock, $.01 par value per
share (the "Series A Preferred Stock"), of the Company at a price of $46 per one
one-thousandth of a share of Series A Preferred Stock (the "Purchase Price"),
subject to adjustment. The complete description and terms of the Rights are set
forth in a Rights Agreement dated as of August 24, 1998, as the same may be
amended from time to time (the "Rights Agreement"), between the Company and
ChaseMellon Shareholder Services, L.L.C., as Rights Agent (the "Rights Agent").
The following description of the Rights Agreement is a summary of the material
terms thereof and is qualified in its entirety by reference to the complete text
of the Rights Agreement.

        Upon distribution, the Rights will be attached to all outstanding shares
of Common Stock and will be represented by the certificates representing such
shares. No separate certificates evidencing the Rights (the "Rights
Certificates") will be distributed prior to the Distribution Date (as defined
below). The Rights will separate from the Common Stock and a "Distribution Date"
will occur upon the earlier of (i) 10 business days following a public
announcement that a person or group of affiliated or associated persons (an
"Acquiring Person") has acquired, or obtained the right to acquire, beneficial
ownership of 15% or more of the outstanding shares of Common Stock (the "Stock
Acquisition Date"), or (ii) 10 business days (or such later date as the Board of
Directors shall determine) following the commencement of a tender or exchange
offer that would result in a person or group beneficially owning 15% or more of
such outstanding shares of Common Stock (the "Tender Offer Date"). The term
"Acquiring Person" is defined in the Rights Agreement to exclude Seitel, Inc.,
together with its executive officers and directors, for so long as they are the
beneficial owner of no more than 18% of the outstanding shares of Common Stock.
Until the Distribution Date, (i) the Rights will be evidenced by the Common
Stock certificates and will be transferred with and only with such Common Stock
certificates, (ii) Common Stock certificates will contain a notation
incorporating the Rights Agreement by reference, and (iii) the surrender for
transfer of any certificates for Common Stock outstanding will also constitute
the transfer of the Rights associated with the Common Stock represented by such
certificates. Pursuant to the Rights Agreement, the Company reserves the right
to require prior to the occurrence of a Triggering Event (as defined below)
that, upon any exercise of Rights, a number of Rights be exercised so that only
whole shares of Series A Preferred Stock will be issued (or fractions that are
integral multiples of one one-thousandth of a share).


                                       C-1

<PAGE>   51




        The Rights are not exercisable until the Distribution Date and will
expire at the close of business on August 4, 2008, or such later date as the
Board of Directors establishes under certain circumstances, unless earlier
redeemed by the Company as described below.

        As soon as practicable after the Distribution Date, Rights Certificates
will be mailed to holders of record of Common Stock as of the close of business
on the Distribution Date and, thereafter, the separate Rights Certificates alone
will represent the Rights. Except as otherwise determined by the Board of
Directors, only shares of Common Stock outstanding prior to the Distribution
Date will be issued with Rights.

        Each share of Series A Preferred Stock purchased upon exercise of the
Rights will be entitled to a minimum preferential quarterly dividend payment
equal to the greater of (i) $1.00 per share, and (ii) 1,000 times the dividend,
if any, declared per share of Common Stock. In the event of liquidation, the
holders of the Series A Preferred Stock will be entitled to a minimum
preferential liquidation payment equal to 1,000 times the par value per share
plus an amount equal to accrued and unpaid dividends and distributions to the
date of such payment. Each share of Series A Preferred Stock will have 1,000
votes and will vote together with the Common Stock. In the event of any merger,
consolidation or other transaction in which shares of Common Stock are
exchanged, each share of Series A Preferred Stock will be entitled to receive
1,000 times the amount per share of Common Stock received in such merger,
consolidation or other transaction. These rights are protected by customary
antidilution provisions. The shares of Series A Preferred Stock will, if issued,
be junior to any other series of Preferred Stock which may be authorized and
issued by the Company, unless the terms of any such other series provide
otherwise. Because of the nature of the Series A Preferred Stock's dividend,
liquidation and voting rights, the value of one one-thousandth of a share of
Series A Preferred Stock purchasable upon the exercise of each Right should
approximate the value of one share of Common Stock.

        In the event that any Person becomes the beneficial owner of 15% or more
of the then outstanding shares of Common Stock (unless such acquisition is made
pursuant to a tender or exchange offer for all outstanding shares of Common
Stock, upon terms and conditions determined by a majority of the directors to be
in the best interests of the Company and its stockholders (a "Qualifying
Offer")), each holder of a Right (other than an Acquiring Person, certain
related parties and transferees) will thereafter have the right to receive, upon
exercise, Common Stock (or, in certain circumstances, cash, property or other
securities of the Company), having a value equal to two times the exercise price
of the Right. For example, at an exercise price of $46 per Right, each Right not
owned by an Acquiring Person (or by certain related parties or transferees)
following the event set forth above would entitle its holder to purchase $92
worth of Common Stock (or other consideration, as noted above) for $46. Assuming
that the Common Stock had a per share market price of $30 at such time, the
holder of each valid Right would be entitled to purchase 3.06 shares of Common
Stock for $46. The Rights are not exercisable following the occurrence of any of
the events described above until such time as the Rights are no longer
redeemable by the Company as described below. Notwithstanding any of the
foregoing, following the occurrence of any of the events set forth in this
paragraph, all Rights that are, or

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<PAGE>   52




(under certain circumstances specified in the Rights Agreement) were,
beneficially owned by any Acquiring Person will be null and void.

        In the event that at any time following the Stock Acquisition Date, (i)
the Company is acquired in a merger or business combination transaction in which
it is not the surviving corporation (other than a merger consummated pursuant to
a Qualifying Offer); (ii) the Company is the surviving corporation in a business
combination transaction (other than such a transaction consummated pursuant to a
Qualifying Offer) but all or part of the outstanding shares of Common Stock are
changed or exchanged for stock or other securities of any person or cash or any
other property; or (iii) more than 50% of the combined assets or earning power
is sold or transferred (in each case other than certain consolidations with,
mergers with and into, or sales of assets or earning power by or to subsidiaries
of the Company as specified in the Rights Agreement), each holder of a Right
(except Rights which have previously been voided as set forth above) shall
thereafter have the right to receive, upon exercise thereof, common stock of the
acquiring company having a value equal to two times the exercise price of the
Right. The events described in this paragraph and in the preceding paragraph are
referred to as the "Triggering Events."

        In order to prevent dilution, the Purchase Price payable, the number and
kind of shares covered by each Right and the number of Rights outstanding are
subject to adjustment from time to time (x) in the event of a stock dividend on,
or a subdivision, combination or reclassification of, the Series A Preferred
Stock, (y) if holders of the Series A Preferred Stock are granted certain rights
or warrants to subscribe for Series A Preferred Stock or securities convertible
into Series A Preferred Stock at less than the current market price of the
Series A Preferred Stock, or (z) upon the distribution to holders of the Series
A Preferred Stock of evidences of indebtedness, cash (excluding regular
quarterly cash dividends), assets (other than dividends payable in Series A
Preferred Stock) or subscription rights or warrants (other than those referred
to in clause (y) above).

        With certain exceptions, no adjustments in the Purchase Price will be
required until cumulative adjustments amount to at least 1% of the Purchase
Price. No fractional shares of Series A Preferred Stock are required to be
issued (other than fractions which are integral multiples of one one-thousandth
of a share of Series A Preferred Stock) and, in lieu thereof, the Company may
make an adjustment in cash based on the market price of the Series A Preferred
Stock on the trading day prior to the date of exercise.

        At any time until ten business days following the Stock Acquisition
Date, the Company may redeem the Rights in whole, but not in part, at a price of
$.001 per Right (payable in cash, shares of Common Stock or other consideration
deemed appropriate by the Board of Directors). The redemption of the Rights may
be made effective at such time on such basis with such conditions as the Board
of Directors in its sole discretion may establish. Immediately upon any
redemption of the Rights, the right to exercise the Rights will terminate and
the only right of the holders of Rights will be to receive the $.001 redemption
price.


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<PAGE>   53



        Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.

        Any of the provisions of the Rights Agreement may be amended by the
Board of Directors of the Company prior to the Distribution Date, other than the
redemption price and the number of one one-thousandths of a share of Series A
Preferred Stock for which a right is exercisable, and the Purchase Price may not
be reduced. After the Distribution Date, the provisions of the Rights Agreement
may be amended by the Board in order to cure any ambiguity, to make changes
which do not adversely affect the interests of holders of Rights or to shorten
or lengthen any time period under the Rights Agreement, except that no amendment
to adjust the time period governing redemption may be made at such time as the
Rights are not redeemable. The Final Expiration Date (as defined in the Rights
Agreement) may be changed and the Purchase Price may be increased at any time
prior to a Stock Acquisition Date or a Tender Offer Date.

        THIS SUMMARY DESCRIPTION OF THE RIGHTS DOES NOT PURPORT TO BE COMPLETE
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO THE RIGHTS AGREEMENT, WHICH IS
HEREBY INCORPORATED BY REFERENCE.

        A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A. A
copy of the Rights Agreement is available free of charge from the Company. This
summary description of the Rights does not purport to be complete and is
qualified in its entirety by reference to the Rights Agreement, which is hereby
incorporated herein by reference.



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