CAIRN ENERGY USA INC
S-8, 1996-06-04
CRUDE PETROLEUM & NATURAL GAS
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      As filed with the Securities and Exchange Commission on June 4, 1996
      Registration No. 33-_____________
                                                                               

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                      
                                    FORM S-8
             REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                      

                             CAIRN ENERGY USA, INC.
             (Exact name of registrant as specified in its charter)

                               Delaware                            23-2169839
                    (State or other jurisdiction of            (I.R.S. Employer
                    incorporation or organization)           Identification No.)

                    8235 Douglas Avenue, Suite 1221
                             Dallas, Texas                    75225
               (Address of principal executive offices)     (Zip Code)

                      

                  CAIRN ENERGY USA, INC. 1993 STOCK OPTION PLAN
             CAIRN ENERGY USA, INC. 1993 DIRECTORS STOCK OPTION PLAN
                            (Full title of the plans)

                      

    Michael R. Gilbert                                     Copy to:    
       President                                      Mark D. Wigder, Esq.
   Cairn Energy USA, Inc.                              Jenkens & Gilchrist,
 8235 Douglas Avenue, Suite 1221                 A Professional Corporation
   Dallas, Texas  75225                          1445 Ross Avenue, Suite 3200
       (214) 369-0316                                 Dallas, Texas  75202
(Name, address and telephone number
 including area code of agent for service)

                      
<TABLE>
<CAPTION>

                         CALCULATION OF REGISTRATION FEE

                                                                         Proposed                 Proposed
                                                 Amount                  Maximum                  Maximum                Amount of
             Title of Class of                   to be                Offering Price             Aggregate              Registration
        Securities to be Registered          Registered(1)           per Share(2)(3)        Offering Price(2)(3)           Fee(3)
<S>                                          <C>                       <C>                         <C>                     <C>   
Common Stock, $0.01 par value per share      870,000 Shares            $10,222,500                 $11.75                  $3,525
============================================  ========================  ====================== ==========================  ======

<FN>

     (1) The securities to be registered  include  750,000  shares  reserved for
issuance  under the Cairn  Energy USA,  Inc.  1993 Stock Option Plan and 120,000
shares  reserved for issuance  under the Cairn Energy USA, Inc.  1993  Directors
Stock Option Plan (collectively, the "Plans").
     (2) Estimated solely for the purpose of calculating the registration fee.
     (3) Calculated pursuant to Rule 457(c) and (h). Accordingly,  the price per
share of the Common Stock  offered  hereunder  pursuant to the Plans is based on
870,000  shares of Common Stock  reserved  for issuance  under the Plans but not
subject to outstanding stock options.
</FN>
</TABLE>



<PAGE>


                                                      PART I

              INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS

Item 1.  Plan Information*

Item 2.  Registrant Information and Employee Plan Annual Information*

                                                      PART II

                 INFORMATION REQUIRED IN REGISTRATION STATEMENT

     The  Corporation   hereby   incorporates  by  reference  the   Registration
Statement,  as amended,  on Form S-8 relating to the Cairn Energy USA, Inc. 1993
Stock Option Plan, Registration Number 33-77102. Item 8. Exhibits

         Each of the following exhibits is filed herewith:

     4.3+  Amendment  No. 3 to Cairn Energy USA, Inc. 1993 Stock Option Plan, as
amended.

     4.4+ Form of Incentive  Stock Option  Agreement under the Cairn Energy USA,
Inc. 1993 Stock Option Plan.

     4.5+ Form of  Nonstatutory  Stock Option  Agreement  under the Cairn Energy
USA, Inc. 1993 Stock Option Plan.

     5.1 Opinion of Jenkens & Gilchrist, a Professional Corporation.
     23.1 Consent of Ernst & Young.
     23.2 Consent of Jenkens & Gilchrist,  a Professional  Corporation (included
in their opinion filed as exhibit 5.1 hereto).

     23.3 Consent of Ryder Scott Company.

________________________
     + Stock option plan, management contract or compensatory arrangement.


- --------
     *Information  required  by  Part I to be  contained  in the  Section  10(a)
prospectus is omitted from this  Registration  Statement in accordance with Rule
428 under the Securities Act of 1933 and the Note to Part I of Form S-8.
CORPDAL:47942.1  15467-00006
<PAGE>

                                                    SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, as amended, the
Registrant certifies that it has reasonable grounds to believe that it meets all
the  requirements  for filing on Form S-8 and has duly caused this  Registration
Statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of Dallas, Texas, on June 3, 1996.

                                                 CAIRN ENERGY USA, INC.


                                                 By:    /s/ Michael R. Gilbert
                                                        Michael R. Gilbert,
                                                        President and 
                                                        Chief Executive Officer


                                                 POWER OF ATTORNEY


     KNOW  ALL MEN BY THESE  PRESENTS,  that  each  individual  whose  signature
appears  below  constitutes  and  appoints  Michael R.  Gilbert and  J. Munro M.
Sutherland,  and each of them, his true and lawful  attorneys-in-fact and agents
with full power of  substitution  and  resubstitution,  for him and in his name,
place  and  stead,  in any and all  capacities,  to sign any and all  amendments
(including  post-effective  amendments) to this Registration  Statement,  and to
file the same  with all  exhibits,  thereto,  and all  document  sin  connection
therewith,  with the  Securities  and Exchange  Commission,  granting  unto said
attorneys-in-fact  and agents,  and each of them, full power and authority to do
and perform each and every act and thing  requisite  and necessary to be done in
and about the  premises,  as fully to all  intents  and  purposes as he might or
could  do  in  person,   hereby   ratifying   and   confirming   all  that  said
attorneys-in-fact  and agents or either of them,  or their or his  substitute or
substitutes,  may lawfully do or cause to be done by virtue hereof.  Pursuant to
the  requirements  of the Securities Act, this  Registration  Statement has been
signed by the following persons in the capacities and on the dates indicated.
<TABLE>
<CAPTION>


<S>                                              <C>                                             <C>
Signature                                        Office                                          Date                        
/s/ Michael R. Gilbert                           President and Chief Executive                   June 3, 1996
Michael R. Gilbert                               Officer and Director (Principal
                                                 Executive Officer)
/s/ J. Munro M. Sutherland                       Senior Vice President, Chief                    June 3, 1996
J. Munro M. Sutherland                           Financial Officer, Treasurer and
                                                 Director (Principal Financial and
                                                 Accounting Officer)
/s/ Robert P. Murphy                             Vice President - Exploration and                June 3, 1996
Robert P. Murphy                                 Director
/s/ John C. Halsted                              Director                                        June 3, 1996
John C. Halsted


CORPDAL:47942.1  15467-00006
<PAGE>


Signature                                                        Office                                    Date
/s/ R. Daniel Robins                             Director                                        June 3, 1996
R. Daniel Robins
/s/ Jack O. Nutter, II                           Director                                        June 3, 1996
Jack O. Nutter, II
/s/ James M. Alexander                           Director                                        June 3, 1996
James M. Alexander
/s/ Thomas R. Hix                                Director                                        June 3, 1996
Thomas R. Hix
</TABLE>


CORPDAL:47942.1  15467-00006
<PAGE>


                                                 INDEX TO EXHIBITS


      Exhibit     Description of Exhibit

     4.3+  Amendment  No. 3 to Cairn Energy USA, Inc. 1993 Stock Option Plan, as
amended.
     4.4+ Form of Incentive  Stock Option  Agreement under the Cairn Energy USA,
Inc. 1993 Stock Option Plan.

     4.5+ Form of  Nonstatutory  Stock Option  Agreement  under the Cairn Energy
USA, Inc. 1993 Stock Option Plan.

     5.1 Opinion of Jenkens & Gilchrist, a Professional Corporation.

     23.1 Consent of Ernst & Young.
 
     23.2 Consent of Ryder Scott Company.

     23.3 Consent of Jenkens & Gilchrist,  a Professional  Corporation (included
in their opinion filed as exhibit 5.1 hereto).

CORPDAL:47942.1  15467-00006


                                                    EXHIBIT 4.3

CORPDAL:47942.1  15467-00006
<PAGE>


                                                  AMENDMENT NO. 3
                                                      TO THE
                                              CAIRN ENERGY USA, INC.
                                              1993 STOCK OPTION PLAN

     This  Amendment  No. 3 to the Cairn Energy USA, Inc. 1993 Stock Option Plan
(the "Amendment") is hereby adopted by Cairn Energy USA, Inc. on the 29th day of
May,  1996 pursuant to the terms of Section 9 of the Cairn Energy USA, Inc. 1993
Stock Option Plan (the "Plan"). W I T N E S S E T H:

     WHEREAS,   Cairn   Energy   USA,   Inc.,   a  Delaware   corporation   (the
"Corporation"),  established  the Plan as approved and ratified by  stockholders
effective April 8, 1993;
     WHEREAS, the Corporation subsequently adopted amendments to the Plan;

     WHEREAS, pursuant to Section 9 of the Plan, the Corporation, acting through
its Board of Directors,  has the right to amend the Plan subject to  stockholder
approval;
     WHEREAS,  the  Compensation  Committee  of  the  Board  of  Directors  (the
"Committee"  has recommended to the Board of Directors of the Corporation  that
the Plan be amended to extend the exercise period upon termination of employment
and provide for full vesting on death,  effective only for options granted after
the  effective  date of this  Amendment,  unless a holder  of a  granted  option
consents to either or both of these  changes for his or her granted  option,  to
increase the maximum number of shares of stock to be granted under the Plan, and
to correct certain typographical errors in a previous amendment;
     WHEREAS,  the Board of Directors  has accepted  the  recommendation  of the
Committee, has obtained the approval of the stockholders of the Corporation, and
has delegated to the Committee the preparation,  adoption, and execution of this
Amendment within constraints it established;
     NOW THEREFORE,  pursuant to its authority  under Section 9 of the Plan, the
Corporation  hereby amends the Plan,  effective  May 22,  1996 unless  otherwise
indicated below, as follows:
     1. Existing  Paragraph  2.1 is hereby  deleted in its entirety and replaced
with the following new Paragraph 2.1:

     "2.1 Description of Stock and Maximum Shares Allocated. The Stock which may
be issued upon the  exercise  of an Option may either be unissued or  reacquired
shares  of  Stock,  as the  Board of  Directors  may,  in its sole and  absolute
discretion, from time to time determine.

     Subject to the adjustments  provided in Paragraph 6.6, the aggregate number
of shares of Stock to be issued  pursuant to the exercise of all Options granted
under the Plan may equal but shall not exceed 1,150,000 shares of Stock."


CORPDAL:47942.1  15467-00006
<PAGE>


     2.  Effective as of February 23, 1994,  Paragraph 6.4 is hereby  deleted in
its entirety and the following new paragraph 6.4 is added in its place:
     "6.4. Term, Time of Exercise and Transferability of Options. In addition to
such other terms and  conditions  as may be included in a  particular  Agreement
granting an Option,  an Option shall be exercisable  during a Holder's  lifetime
only by the Holder or by the Holder's guardian or legal representative.

     An Option  shall  not be  transferrable  other  than by will or the laws of
descent and distribution or pursuant to a qualified  domestic relations order as
defined by the Code or Title I of the Employee Retirement Income Security Act or
the rules thereunder.

     The provisions of the remainder of this Paragraph shall apply to the extent
a Holder's Agreement does not expressly provide otherwise. If a Holder ceases to
be an  Eligible  Individual,  the  portion,  if  any,  of  the  Option  that  is
exercisable  but  remains  unexercised  on the date the  Holder  stops  being an
Eligible Individual shall terminate ninety (90) days after such Holder ceases to
be an Eligible Individual.  Notwithstanding the foregoing, if a Holder ceases to
be an Eligible  Individual  by reason of (a)  disability  (as defined in section
105(d)(4) of the Code immediately  prior to its repeal) or (b) death, the Holder
shall have the right for twelve  months after the date of disability or death to
exercise an Option to the extent such Option is  exercisable  on the date of his
disability or death.
     The  portion of the Option that is not  exercisable  on the date the Holder
ceases to be an Eligible  Individual  shall  terminate  and be  forfeited to the
Corporation  on  the  date  of  such  cessation.  Notwithstanding  the  previous
sentence,  if a  Change  in  Control  of  the  Corporation  occurs  and,  within
twenty-four months from the date of the Change in Control of the Corporation,  a
Holder ceases to be an Eligible  Individual  either because (i) the  Corporation
terminates the Holder's  employment with the Corporation for a reason other than
Due Cause or (ii) the Holder  terminates his employment with the Corporation due
to a Severance  Termination by the Holder of the Holder's Employment  Agreement,
then any Options  held by such Holder shall be  exercisable  in full on the date
such Holder ceases to be an Eligible Individual and no portion of an Option held
by such Holder shall  terminate or forfeit on the date such holder  ceases to be
     an Eligible  Person.  Notwithstanding  any other provision of this Plan, no
Option shall be exercisable after the expiration of ten (10) years from the date
it is granted, or the period specified in Paragraph 4.1 if applicable.

     
     The Committee  shall have the authority to prescribe in any Agreement  that
the Option  evidenced by the Agreement may be exercised in full or in part as to
any  number of  shares  subject  to the  Option at any time or from time to time
during the term of the Option, or in such installments at such times during said
term as the  Committee  may  prescribe;  provided,  however,  that no part of an
Option may be made exercisable  during the six (6) month period beginning on the
date the Option  was  granted.  Except as  provided  above and unless  otherwise
provided in any  Agreement,  an Option may be exercised at any time or from time
to time during the term of the  Option.  Such  exercise  may be as to any or all
whole (but no fractional) shares which have become purchasable under the Option.
CORPDAL:47942.1  15467-00006

<PAGE>


     Within a  reasonable  time (or such time as may be  permitted by law) after
the Corporation  receives written notice that the Holder has elected to exercise
all or a portion of an Option,  such notice to be accompanied by payment in full
of the  aggregate  Option  exercise  price  of the  number  of  shares  of Stock
purchased,  the Corporation  shall issue and deliver a certificate  representing
the shares acquired in consequence of the exercise and any other amounts payable
in consequence of such  exercise.  In the event that a Holder  exercises both an
Incentive  Option,  or portion of one, and a  Nonstatutory  Stock  Option,  or a
portion of one, separate Stock  certificates  shall be issued, one for the Stock
subject  to  the  Incentive  Option  and  one  for  the  Stock  subject  to  the
Nonstatutory Stock Option.  The number of the shares of Stock  transferrable due
to an exercise of an Option  under this Plan shall not be  increased  due to the
passage of time, except as may be provided in an Agreement;  provided,  however,
the number of such shares of Stock which are  transferrable  may increase due to
the  occurrence of certain  events which are fully  described in Paragraph  6.5.
Nothing in the Plan or in any Option granted under the Plan shall require the
     Corporation  to issue  any  shares  upon  exercise  of any  Option  if such
issuance  would,  in the opinion of counsel for the  Corporation,  constitute  a
violation of the Securities Act or any other  applicable  statute or regulation,
as then in effect.  At the time of any  exercise of an Option,  the  Corporation
may, as a condition  precedent to the exercise of such Option,  require from the
Holder  (or in the  event  of  his  death,  his  legal  representatives,  heirs,
legatees, or distributees) such written representations,  if any, concerning his
sophistication,  financial means,  access to information  about the Corporation,
and  intentions  with regard to the retention or disposition of the shares being
acquired by exercise of such Option and such written  covenants and  agreements,
if any,  as to the  manner of  disposal  of such  shares  as, in the  opinion of
counsel to the  Corporation,  may be necessary to ensure that any disposition by
such  Holder (or in the event of his death,  his legal  representatives,  heirs,
legatees,  or distributees),  will not involve a violation of the Securities Act
or any other  applicable  state or  federal  statute or  regulation,  as then in
effect. Certificates for shares of Stock, when issued, may have the following or
similar  legend,  or statements of other  applicable  restrictions,  endorsed on
them, and may not be immediately transferable:
    
     The shares of stock evidenced by this  certificate  have been issued to the
registered owner in reliance upon written representations that these shares have
been purchased for investment.  These shares have not been registered  under the
Securities Act of 1933, as amended,  or any applicable state securities laws, in
reliance upon an exemption from registration.  Without such registration,  these
shares may not be sold,  transferred,  assigned or otherwise disposed of unless,
in the opinion of the  Corporation and its legal counsel,  such sale,  transfer,
assignment  or  disposition  will not be in violation of the  Securities  Act of
1933,  as  amended,  applicable  rules and  regulations  of the  Securities  and
Exchange Commission, and any applicable state securities laws."

     3.  Paragraph  6.4 is  hereby  amended  to  delete  the  third  and  fourth
paragraphs  of  Paragraph  6.4 in their  entirety  and to replace  them with the
following new language:

CORPDAL:47942.1  15467-00006

<PAGE>



     "The  provisions  of the  remainder  of this  Paragraph  shall apply to the
extent a Holder's  Agreement does not expressly provide  otherwise.  If a Holder
ceases to be an Eligible Individual,  the portion, if any, of the Option that is
exercisable  but  remains  unexercised  on the date the  Holder  stops  being an
Eligible  Individual  shall terminate  twenty-four (24) months after such Holder
ceases to be an Eligible Individual.

     The  portion of the Option that is not  exercisable  on the date the Holder
ceases to be an Eligible  Individual  shall  terminate  and be  forfeited to the
Corporation  on  the  date  of  such  cessation.  Notwithstanding  the  previous
sentence,  if (i) a Change in  Control of the  Corporation  occurs  and,  within
twenty-four months from the date of the Change in Control of the Corporation,  a
Holder ceases to be an Eligible  Individual  either because (A) the  Corporation
terminates the Holder's  employment with the Corporation for a reason other than
Due Cause or (B) the Holder  terminates his employment  with the Corporation due
to a Severance  Termination by the Holder of the Holder's Employment  Agreement,
or (ii) a Holder  ceases to be an Eligible  Individual  by reason of death,  any
Options held by such Holder shall be exercisable in full on the date such Holder
ceases to be an  Eligible  Individual,  and no portion of an Option held by such
Holder  shall  terminate  or  forfeit  on the date such  Holder  ceases to be an
Eligible Individual.  The provisions of this paragraph of Paragraph 6.4 shall be
applied  before  the  provisions  of  the  immediately  preceding  paragraph  of
Paragraph 6.4."


CORPDAL:47942.1  15467-00006
<PAGE>


     IN WITNESS  WHEREOF,  the  Corporation  has caused  this  instrument  to be
executed by its duly authorized officer on the date first written above.

                                            CAIRN ENERGY USA, INC.



                                           By:  /s/ Michael R. Gilbert      
                                           Title: President          



CORPDAL:47942.1  15467-00006


                                                    EXHIBIT 4.4

CORPDAL:47942.1  15467-00006
<PAGE>


CAIRN ENERGY USA, INC.
1993 STOCK OPTION PLAN
INCENTIVE STOCK OPTION AGREEMENT

     THIS  AGREEMENT is made and entered into this day of , 199 , between  Cairn
Energy USA, Inc., a Delaware corporation (the "Corporation"), and (the "Holder")
in connection  with the grant of an Incentive  Option  (defined below) under the
Cairn Energy USA, Inc. 1993 Stock Option Plan (the "Plan"), as amended.

                                               W I T N E S S E T H:

     WHEREAS, the Holder is employed by the Corporation or one of its Affiliates
(defined below) in a key position; and
     WHEREAS,  the  Corporation  desires  to  encourage  the Holder to own Stock
(defined  below) and to give him added incentive to advance the interests of the
Corporation through the Plan; and
     WHEREAS,  the  Corporation  adopted the Plan,  as approved  and ratified by
stockholders,  effective April 8,  1993, and subsequently  adopted amendments to
the Plan; and
     WHEREAS, the Corporation desires to grant the Holder an Incentive Option to
purchase  shares  of  Stock  of  the  Corporation  under  terms  and  conditions
established by the Board of Directors (defined below);

     NOW, THEREFORE,  in consideration of these premises, the parties agree that
the following  shall  constitute the Agreement  between the  Corporation and the
Holder:

     1.  Definitions.  For purposes of this Agreement,  defined terms shall have
the meanings given to them by the Plan except as specified below:
   
     a. "Affiliate" shall mean (a) any corporation,  other than the Corporation,
in an unbroken chain of corporations  ending with the Corporation if each of the
corporations,  other than the  Corporation,  owns stock possessing fifty percent
(50%) or more of the total combined  voting power of all classes of stock in one
of the other corporations in such chain and (b) any corporation,  other than the
Corporation, in an unbroken chain of corporations beginning with the Corporation
if each of the  corporations,  other than the last  corporation  in the unbroken
chain,  owns stock  possessing fifty percent (50%) or more of the total combined
voting  power of all classes of stock in one of the other  corporations  in such
chain.  b.  "Agreement"  shall mean this document as executed by the Corporation
and the Holder, and as it may be subsequently amended.


CORPDAL:47942.1  15467-00006
<PAGE>

     c.  "Exchange  Act"  shall mean the  Securities  Exchange  Act of 1934,  as
amended, or any similar or superseding statute or statutes.
     
     d.  "Incentive  Option"  and  "Option"  shall mean a stock  option  granted
pursuant to this  Agreement  that is intended  to satisfy  the  requirements  of
section 422 of the Code.

     e. "Securities  Act" shall mean the Securities Act of 1933, as amended,  or
any similar or superseding statute or statutes.

     2. Grant of Incentive Option. Subject to the terms and conditions set forth
in this Agreement,  the Corporation  grants to the Holder an Incentive Option to
purchase from the  Corporation  during the period ending ten (10) years from the
date of this  Agreement  shares of Stock at a price of $ per  share,  subject to
adjustment,  if any,  as  provided  in this  Agreement.  In no event  shall  the
exercise  price per share of this Option be less than the greater of (a) the par
value per share of Stock or (b) 100% of the Fair Market Value per share of Stock
on the date of grant of this Option.
     This Incentive  Option is  exercisable  with respect to the shares of Stock
indicated above on or after the following dates:

shares of Stock
additional shares of Stock
additional shares of Stock

     In no event shall the Option be exercisable  within the first six months of
its Date of Grant.  In  addition,  the number of shares  exercisable  under this
Option shall be reduced to the extent necessary so that the sum of:

     (a) the  aggregate  Fair  Market  Value of shares of Stock  subject to this
Incentive  Option that first become  purchasable  in a calendar  year under this
Incentive Option, and

     (b) the  aggregate  Fair  Market  Value of  shares of Stock or stock of any
Affiliate (or a predecessor of the  Corporation or an Affiliate)  subject to any
other  incentive stock option (within the meaning of section 422 of the Code) of
the  Corporation  or its  Affiliates  (or a predecessor  corporation of any such
corporation),  that  first  become  purchasable  in a  calendar  year under such
     incentive  stock  option  does not  (with  respect  to the  Holder)  exceed
$100,000,  with  such Fair  Market  Value to be  determined  as of the date this
Incentive Option or such other incentive stock option is granted.

     For  purposes  of this  Paragraph,  "predecessor  corporation"  means (i) a
corporation that was a party to a transaction described in section 425(a) of the
Code (or that would be so described if a substitution  or assumption  under such
section had been effected) with the Corporation,  (ii) a corporation that at the
time the new  incentive  stock option  (within the meaning of section 422 of the
Code)  is  granted,  is  an  Affiliate  of  the  Corporation  or  a  predecessor
corporation of any such corporations,  or (iii) a predecessor corporation of any
such corporations.
CORPDAL:47942.1  15467-00006
<PAGE>

     3. Notice of Exercise.  This Incentive  Option may be exercised in whole or
in part, from time to time, in accordance with Paragraph 2, by written notice to
the Corporation at the address provided in this Agreement, which notice shall:
   
     i.  specify  the number of whole  shares of Stock to be  purchased  and the
exercise price to be paid for such shares;

     ii. if the  person  exercising  this  Incentive  Option  is not the  Holder
himself,  contain or be accompanied by evidence satisfactory to the Committee of
such person's right to exercise this Incentive Option; and
   
     (c) be  accompanied by payment in full of the purchase price in the form of
cash, a certified or cashier's check to the order of the Corporation,  or a wire
transfer of immediately available funds.

     This Incentive Option may be exercised only in increments at least equal to
the lesser of one hundred  (100)  shares or ten  percent  (10%) of the number of
whole shares as to which it is exercisable.

     4. Investment  Letter.  The Holder agrees that the shares of Stock acquired
on exercise of this  Incentive  Option shall be acquired for his own account for
investment  only and not with a view to, or for resale in connection  with,  any
distribution or public offering thereof within the meaning of the Securities Act
or other applicable  securities laws. If the Committee so determines,  any Stock
certificates  issued upon exercise of this Incentive  Option shall bear a legend
to the effect that the shares have been so acquired. The Corporation may, but in
no  event  shall be  required  to,  bear  any  expenses  of  complying  with the
Securities Act, other applicable securities laws or the rules and regulations of
any national  securities  exchange or other  regulatory  authority in connection
with the registration,  qualification,  or transfer, as the case may be, of this
Incentive Option or any shares of Stock acquired upon the exercise thereof.  The
foregoing  restrictions  on the  transfer  of  the  shares  of  Stock  shall  be
inoperative if (a) the Corporation  previously shall have been furnished with an
opinion of counsel,  satisfactory  to it, to the effect that such  transfer will
not require registration under the Securities Act or other applicable securities
laws or (b) the shares of Stock shall have been duly  registered  in  compliance
with the Securities Act and other applicable securities laws.

     5. Transfer and Exercise of Incentive  Option.  This Incentive Option shall
not be transferable except by will or by the laws of descent and distribution or
pursuant to a qualified domestic relations order as defined in the Code or Title
I of the  Employee  Retirement  Income  Security  Act  ("ERISA")  or  the  rules
thereunder.  No  assignment  or  transfer  of  this  Incentive  Option,  whether
voluntary or involuntary, by operation of law or otherwise, except a transfer by
will or by the laws of  descent  or  distribution  or  pursuant  to a  qualified
domestic relations order as defined in the Code or Title I of ERISA or the rules
thereunder,  shall vest in the  assignee  or  transferee  any  interest or right
whatsoever in this Incentive Option.

CORPDAL:47942.1  15467-00006
<PAGE>

     During the Holder's  lifetime,  this Incentive Option may be exercised only
by him, his guardian or legal  representative or the recipient of this Incentive
Option pursuant to a qualified  domestic  relations order as defined in the Code
or Title I of ERISA or the rules thereunder.
     
     6. Status of Holder.  The Holder shall not be deemed a  stockholder  of the
Corporation with respect to any of the shares of Stock subject to this Incentive
Option,  except to the extent that such  shares  shall have been  purchased  and
transferred to him. The  Corporation  shall not be required to issue or transfer
any  certificates  for shares of Stock purchased upon exercise of this Incentive
Option until all applicable requirements of law have been complied with and such
shares shall have been duly listed on any securities exchange on which the Stock
may then be listed.
      
     7. No Effect on Capital  Structure.  This Incentive Option shall not affect
the right of the  Corporation  or any Affiliate to reclassify,  recapitalize  or
otherwise change its capital or debt structure or to merge, consolidate,  convey
any or all of its assets, dissolve, liquidate, windup, or otherwise reorganize.
    
     8. Expiration of Incentive Option Upon Termination of Employment. Except as
otherwise  specifically provided in this Agreement,  if a Holder ceases to be an
Eligible Individual,  the portion, if any, of the Option that is exercisable but
remains  unexercised  on the date the Holder stops being an Eligible  Individual
shall  terminate  twenty-four  (24)  months  after such  Holder  ceases to be an
Eligible Individual.
      
     The  portion of the Option that is not  exercisable  on the date the Holder
ceases to be an Eligible  Individual  shall  terminate  and be  forfeited to the
Corporation  on  the  date  of  such  cessation.  Notwithstanding  the  previous
sentence,  if (i) a Change in  Control of the  Corporation  occurs  and,  within
twenty-four months from the date of the Change in Control of the Corporation,  a
Holder ceases to be an Eligible  Individual  either because (A) the  Corporation
terminates the Holder's  employment with the Corporation for a reason other than
Due Cause or (B) the Holder  terminates his employment  with the Corporation due
to a Severance  Termination by the Holder of the Holder's Employment  Agreement,
or (ii) a Holder ceases to be an Eligible  Individual  by reason of death,  then
any Options  held by such Holder shall be  exercisable  in full on the date such
Holder ceases to be an Eligible Individual,  and no portion of an Option held by
such Holder shall  terminate or forfeit on the date such Holder  ceases to be an
Eligible  Individual.  The  provisions of this paragraph of Paragraph 8 shall be
applied  before  the  provisions  of  the  immediately  preceding  paragraph  of
Paragraph 8.
     
     9. Adjustments Upon Changes in Capitalization, Merger, Etc. Notwithstanding
any other provision of this Agreement,  in the event of any change in the number
of outstanding shares of Stock
   
     (a) effected without receipt of consideration by the Corporation, by reason
of a stock  dividend,  or  split,  combination,  exchange  of  shares  or  other
recapitalization,  merger,  or  otherwise,  in  which  the  Corporation  is  the
surviving corporation, or

CORPDAL:47942.1  15467-00006
<PAGE>

     (b) by reason of a spin-off  of a part of the  Corporation  into a separate
entity,  or  assumptions  and  conversions  of  outstanding  grants  due  to  an
acquisition by the Corporation of a separate entity,

     (1) the  aggregate  number and class of shares  subject  to this  Incentive
Option  and  (2)  the  exercise  price  of  this   Incentive   Option  shall  be
automatically  adjusted to accurately  and equitably  reflect the effect of such
changes.  In the event of a dispute  concerning such  adjustment,  the Committee
shall have full discretion to resolve the dispute.  The number of shares subject
to this Incentive  Option shall be  automatically  reduced by any fraction which
results from any adjustment made pursuant to this Paragraph. In the event of:

     (a) a dissolution or liquidation of the Corporation,
      
     (b)  a  merger  or   consolidation   (other  than  a  merger   effecting  a
reincorporation  of the  Corporation  in another  state or any other merger or a
consolidation in which the  stockholders of the surviving  corporation and their
proportionate  interests  in the  surviving  corporation  immediately  after the
merger or consolidation are  substantially  identical to the stockholders of the
Corporation and their  proportionate  interests in the  Corporation  immediately
prior to the  merger  or  consolidation)  in which  the  Corporation  is not the
surviving  corporation (or survives only as a subsidiary of another  corporation
in a transaction in which the  stockholders of the parent of the Corporation and
their  proportionate  interests in the parent  immediately after the transaction
are not substantially identical to the stockholders of the Corporation and their
proportionate  interests therein immediately prior to the transaction;  provided
that  the  Board  of  Directors  may at any  time  prior  to  such a  merger  or
consolidation  provide  by  resolution  that the  foregoing  provisions  of this
parenthetical  shall not apply if a majority of the board of  directors  of such
parent immediately after the transaction consists of individuals who constituted
a majority of the Board of Directors immediately prior to the transaction), or
         
     (c) a transaction in which any person (other than Cairn Energy PLC) becomes
the owner of 50% or more of the total  combined  voting  power of all classes of
stock of the Corporation (provided,  however, that the Board of Directors may at
any time prior to such transaction  provide by resolution that this Subparagraph
(c) shall not apply if such acquiring  person is a corporation and a majority of
the  board of  directors  of the  acquiring  corporation  immediately  after the
transaction  consists of individuals  who constituted a majority of the Board of
Directors  immediately  prior  to the  acquisition  of such  50% or  more  total
combined voting power)

     the Board of Directors  may, at its election,  as of the effective  time of
such  transaction,  either  (1)  change  the  number and kind of shares of stock
(including  substitution of shares of another corporation) and exercise price in
the manner it deems  appropriate,  provided,  however,  that in no event may any
change be made under this  Paragraph  which would  constitute  a  "modification"
within the meaning of section  425(h)(3) of the Code, or (2) purchase the Option
from the Holder by  tendering  cash equal to the Fair Market  Value of the Stock
represented  by the Option less the  exercise  price of the Option  specified in
this Agreement, without regard to the determination as
CORPDAL:47942.1  15467-00006
<PAGE>

     to the periods and  installments  of  exercisability  made pursuant to this
Agreement,  if (and only if) the  Option  has not at that time  expired  or been
terminated.
      
     10. Committee Authority. Any question concerning the interpretation of this
Agreement,  any adjustments  required to be made under this  Agreement,  and any
controversy  which may arise under this  Agreement  shall be  determined  by the
Committee in its sole discretion.

     11. Notice of Disqualifying Disposition. In order to enable the Corporation
to avail itself of any income tax  deduction  to which it may be  entitled,  the
Holder  shall  notify  the  Corporation  of his  intent to dispose of any of the
shares of Stock purchased pursuant to this Incentive Option within two (2) years
from the date of the  grant of the  Incentive  Option  and one (1) year from the
date of exercise of the Incentive  Option,  and promptly after such  disposition
the  Holder  shall  notify  the  Corporation  of the  number  of shares of Stock
disposed of, the dates of acquisition  and  disposition of such shares,  and the
consideration, if any, received on such disposition.  Nothing in this Paragraph,
however,  shall  give the  Holder  any right to  dispose of shares of Stock in a
manner that is  inconsistent  with any provision of the Plan or any Paragraph of
this  Agreement.  If in connection  with any such  disposition  the  Corporation
becomes  liable for  withholding  taxes and has no amounts owing the Holder with
which to discharge  its  withholding  obligation,  the Holder shall  provide the
Corporation  with the amount needed to discharge the  Corporation's  withholding
obligation  and shall  indemnify  the  Corporation  against any penalties it may
incur  through its  inability to apply  amounts owing the Holder in discharge of
its withholding obligation.
     
     12.  Incentive Option  Qualification.  This Incentive Option is intended to
qualify as an "incentive  stock option" within the meaning of section 422 of the
Internal Revenue Code of 1986, as amended, and shall be so construed;  provided,
however,   that  nothing  in  this   Agreement   shall  be   interpreted   as  a
representation,  guarantee or other  undertaking on the part of the  Corporation
that this  Incentive  Option is or will be determined to be an "incentive  stock
option" within such section or any other section of the Internal Revenue Code.
   
     13. Plan Controls. The terms of this Agreement are governed by the terms of
the  Plan,  a copy of which is  attached  as  Exhibit  A and made a part of this
Agreement  as if  fully  set  forth  in this  Agreement,  and in the case of any
inconsistency between the terms of this Agreement and the terms of the Plan, the
terms of the Plan shall control.

     14. Notice.  Whenever any notice is required or permitted under the Plan or
this  Agreement,  such  notice  must be in  writing  and  personally  delivered,
telecopied (if confirmed),  or sent by mail. Any notice required or permitted to
be delivered under the Plan or this Agreement shall be deemed to be delivered on
the date which it is personally delivered, or, whether actually received or not,
on the third  business  day after it is  deposited  in the United  States  mail,
certified  or  registered,  postage  prepaid,  addressed to the person who is to
receive it at the address which such person has previously  specified by written
notice delivered in accordance with
<PAGE>

     this Paragraph.  The Corporation or Holder may change, at any time and from
time to time, by written notice to the other, the address  previously  specified
for receiving  notices.  Until changed in accordance  with this  paragraph,  the
Corporation  and the Holder  specify  their  respective  addresses  as set forth
below:
      Corporation:                          Cairn Energy USA, Inc.
                                    8235 Douglas Avenue, Suite 1221
                                    Dallas, Texas 75225
                                    Attention:  Secretary

      Holder:                                                                   
                                                                                
                                                                                

     15. Information Confidential.  As partial consideration for the granting of
this  Incentive  Option,  the Holder agrees that he will keep  confidential  all
information  and knowledge  that he has relating to the manner and amount of his
participation  in the Plan;  provided,  however,  that such  information  may be
disclosed  as required  by law and may be given in  confidence  to the  Holder's
spouse, tax and financial advisors,  or to a financial institution to the extent
that such information is necessary to secure a loan.

     IN WITNESS  WHEREOF,  the  Corporation  has  caused  this  Agreement  to be
executed  and the Holder has executed  this  Agreement on the day and year first
above written.
                                            "CORPORATION"

                                            CAIRN ENERGY USA, INC.

                                            By:                                
                                                                               


                                            "HOLDER"

                                                                               
                                                                               




                                                    EXHIBIT 4.5


<PAGE>

                                              CAIRN ENERGY USA, INC.
                                              1993 STOCK OPTION PLAN
                                        NONSTATUTORY STOCK OPTION AGREEMENT



     THIS  AGREEMENT is made and entered into this day of , 199 , between  Cairn
Energy USA, Inc., a Delaware corporation (the "Corporation"), and (the "Holder")
in connection with the grant of a Nonstatutory  Option (defined below) under the
Cairn Energy USA, Inc. 1993 Stock Option Plan (the "Plan"), as amended.

                                               W I T N E S S E T H:

     WHEREAS,  the Holder is either an employee of the Corporation or one of its
Affiliates (defined below) in a key position; and
     WHEREAS,  the  Corporation  desires  to  encourage  the Holder to own Stock
(defined  below) and to give him added incentive to advance the interests of the
Corporation through the Plan; and
     WHEREAS,  the  Corporation  adopted the Plan,  as approved  and ratified by
stockholders,  effective April 8,  1993, and subsequently  adopted amendments to
the Plan; and
     WHEREAS,  the Corporation desires to grant the Holder a Nonstatutory Option
to  purchase  shares of Stock of the  Corporation  under  terms  and  conditions
established by the Board of Directors (defined below);
     NOW, THEREFORE,  in consideration of these premises, the parties agree that
the following  shall  constitute the Agreement  between the  Corporation and the
Holder:
     1.  Definitions.  For purposes of this Agreement,  defined terms shall have
the meanings given to them by the Plan except as specified below:

     1.1 "Agreement" shall mean this document as executed by the Corporation and
the Holder, and as it may be subsequently amended.
     1.2  "Exchange  Act" shall mean the  Securities  Exchange  Act of 1934,  as
amended, or any similar or superseding statute or statutes.
     1.3  "Nonstatutory  Option" and "Option"  shall mean a stock option granted
pursuant to this Agreement that does not satisfy the requirements of section 422
of the Code.

     1.4 "Securities Act" shall mean the Securities Act of 1933, as amended,  or
any similar or superseding statute or statutes.


CORPDAL:47942.1  15467-00006
<PAGE>

     2. Grant of  Nonstatutory  Option.  Subject to the terms and conditions set
forth in this  Agreement,  the  Corporation  grants to the Holder a Nonstatutory
Option to purchase from the Corporation  during the period ending ten (10) years
from  the date of this  Agreement  shares  of  Stock at a price of $ per  share,
subject to adjustment,  if any, as provided in this Agreement. In no event shall
the exercise price per share of this Option be less than the par value per share
of Stock.

     This Nonstatutory Option is exercisable with respect to the shares of Stock
indicated above on or after the following dates:
<TABLE>
<CAPTION>

     <S>                                            <C>                 <C>   
                                                                        shares of Stock
                                                                        additional shares of Stock
                                                                        additional shares of Stock
</TABLE>

     In no event shall the Option be exercisable  within the first six months of
its Date of Grant.
     3. Notice of Exercise.  This Nonstatutory  Option may be exercised in whole
or in part, from time to time, in accordance with Paragraph 2, by written notice
to the  Corporation  at the address  provided in this  Agreement,  which  notice
shall:
     (a) specify  the number of whole  shares of Stock to be  purchased  and the
exercise price to be paid for such shares;

     (b) if the person  exercising  this  Nonstatutory  Option is not the Holder
himself,  contain or be accompanied by evidence satisfactory to the Committee of
such person's right to exercise this Nonstatutory Option; and

     (c) be  accompanied by payment in full of the purchase price in the form of
cash, a certified or cashier's  check to the order of the  Corporation or a wire
transfer of immediately available funds.

     This Nonstatutory Option may be exercised only in increments at least equal
to the lesser of one hundred  (100) shares or ten percent (10%) of the number of
whole shares as to which it is exercisable.

     4. Investment  Letter.  The Holder agrees that the shares of Stock acquired
on exercise of this  Nonstatutory  Option  shall be acquired for his own account
for  investment  only and not with a view to, or for resale in connection  with,
any distribution or public offering thereof within the meaning of the Securities
Act or other  applicable  securities  laws. If the Committee so determines,  any
Stock certificates issued upon exercise of this Nonstatutory Option shall bear a
legend to the effect that the shares have been so acquired. The Corporation may,
but in no event shall be required to, bear any  expenses of  complying  with the
Securities Act, other applicable securities laws or the rules and regulations of
any national  securities  exchange or other  regulatory  authority in connection
with the registration,  qualification,  or transfer, as the case may be, of this
Nonstatutory  Option or any shares of Stock  acquired  upon the exercise of this
Nonstatutory Option. The foregoing restrictions on the transfer of the shares of
Stock shall be inoperative  if (a) the  Corporation  previously  shall have been
furnished  with an opinion of  counsel,  satisfactory  to it, to the effect that
such transfer will not require registration under the Securities Act or other

CORPDAL:47942.1  15467-00006
<PAGE>

     applicable securities laws, or (b) the shares of Stock shall have been duly
registered in compliance with the Securities Act and other applicable securities
laws.
     5. Transfer and Exercise of Nonstatutory  Option.  This Nonstatutory Option
shall  not be  transferable  except  by  will  or by the  laws  of  descent  and
distribution or pursuant to a qualified  domestic  relations order as defined in
the Code or Title I of the Employee  Retirement Income Security Act ("ERISA") or
the rules  thereunder.  No assignment or transfer of this  Nonstatutory  Option,
whether  voluntary or  involuntary,  by operation of law or otherwise,  except a
transfer  by will or by the laws of descent or  distribution  or  pursuant  to a
qualified domestic relations order as defined in the Code or Title I of ERISA or
the rules  thereunder,  shall vest in the assignee or transferee any interest or
right whatsoever in this Nonstatutory Option.
     During the Holder's  lifetime,  this  Nonstatutory  Option may be exercised
only by him,  his  guardian  or legal  representative  or the  recipient  of the
Nonstatutory  Option pursuant to a qualified domestic relations order as defined
in the Code or Title I of ERISA or the rules thereunder.
     6. Status of Holder.  The Holder shall not be deemed a  stockholder  of the
Corporation  with  respect  to  any of the  shares  of  Stock  subject  to  this
Nonstatutory  Option,  except to the  extent  that such  shares  shall have been
purchased and transferred to him. The Corporation shall not be required to issue
or transfer any certificates for shares of Stock purchased upon exercise of this
Nonstatutory Option until all applicable requirements of law have been satisfied
and such shares shall have been duly listed on any securities  exchange on which
the Stock may then be listed.
     7. No Effect on  Capital  Structure.  This  Nonstatutory  Option  shall not
affect the right of the Corporation or any Affiliate to reclassify, recapitalize
or  otherwise  change its capital or debt  structure  or to merge,  consolidate,
convey any or all of its  assets,  dissolve,  liquidate,  windup,  or  otherwise
reorganize.
     8. Expiration of Nonstatutory Option Upon Termination of Employment. Except
as otherwise  specifically provided in this Agreement,  if a Holder ceases to be
an Eligible  Individual,  the portion, if any, of the Option that is exercisable
but  remains  unexercised  on the  date  the  Holder  stops  being  an  Eligible
Individual  shall terminate  twenty-four (24) months after such Holder ceases to
be an Eligible Individual.
     The  portion of the Option that is not  exercisable  on the date the Holder
ceases to be an Eligible  Individual  shall  terminate  and be  forfeited to the
Corporation  on  the  date  of  such  cessation.  Notwithstanding  the  previous
sentence,  if (i) a Change in  Control of the  Corporation  occurs  and,  within
twenty-four months from the date of the Change in Control of the Corporation,  a
Holder ceases to be an Eligible  Individual  either because (A) the  Corporation
terminates the Holder's  employment with the Corporation for a reason other than
Due Cause or (B) the Holder  terminates his employment  with the Corporation due
to a Severance  Termination by the Holder of the Holder's Employment  Agreement,
or (ii) a Holder ceases to be an Eligible  Individual  by reason of death,  then
any Options  held by such Holder shall be  exercisable  in full on the date such
Holder ceases to be an Eligible Individual,  and no portion of an Option held by
such Holder shall  terminate or forfeit on the date such Holder  ceases to be an
Eligible Individual. The provisions
CORPDAL:47942.1  15467-00006


<PAGE>

     of this  paragraph of Paragraph 8 shall be applied before the provisions of
the immediately preceding paragraph of Paragraph 8.
     9. Adjustments Upon Changes in Capitalization, Merger, Etc. Notwithstanding
any other provision of this Agreement,  in the event of any change in the number
of outstanding shares of Stock
     (a) effected without receipt of consideration by the Corporation, by reason
of a stock dividend,  split,  combination,  exchange or other  recapitalization,
merger, or otherwise, in which the Corporation is the surviving corporation, or
     (b) by reason of a spin-off  of a part of the  Corporation  into a separate
entity,  or  assumptions  and  conversions  of  outstanding  grants  due  to  an
acquisition by the Corporation of a separate entity,
     (1) the aggregate  number and class of shares subject to this  Nonstatutory
Option  and  (2) the  exercise  price  of  this  Nonstatutory  Option  shall  be
automatically  adjusted to accurately  and equitably  reflect the effect of such
changes.  In the event of a dispute  concerning such  adjustment,  the Committee
shall have full discretion to resolve the dispute.  The number of shares subject
to this Nonstatutory Option shall be automatically reduced by any fraction which
results from any adjustment made pursuant to this Paragraph.
In the event of:

     (a) a dissolution or liquidation of the Corporation,

     (b)  a  merger  or   consolidation   (other  than  a  merger   effecting  a
reincorporation  of the  Corporation  in  another  state or any other  merger or
consolidation in which the  stockholders of the surviving  corporation and their
proportionate  interests  in the  surviving  corporation  immediately  after the
merger or consolidation are  substantially  identical to the stockholders of the
Corporation and their  proportionate  interests in the  Corporation  immediately
prior to the  merger  or  consolidation)  in which  the  Corporation  is not the
surviving  corporation (or survives only as a subsidiary of another  corporation
in a transaction in which the  stockholders of the parent of the Corporation and
their  proportionate  interests in the parent  immediately after the transaction
are not substantially identical to the stockholders of the Corporation and their
proportionate interests therein immediately prior to the transaction;  provided,
however,  that the Board of Directors  may at any time prior to such a merger or
consolidation  provide  by  resolution  that the  foregoing  provisions  of this
parenthetical  shall not apply if a majority of the board of  directors  of such
parent immediately after the transaction consists of individuals who constituted
a majority of the Board of Directors immediately prior to the transaction), or

CORPDAL:47942.1  15467-00006
<PAGE>

     (c) a transaction in which any person (other than Cairn Energy PLC) becomes
the owner of 50% or more of the total  combined  voting  power of all classes of
stock of the Corporation (provided,  however, that the Board of Directors may at
any time prior to such transaction  provide by resolution that this Subparagraph
(c) shall not apply if such acquiring  person is a corporation and a majority of
the  board of  directors  of the  acquiring  corporation  immediately  after the
transaction  consists of individuals  who constituted a majority of the Board of
Directors  immediately  prior  to the  acquisition  of such  50% or  more  total
combined voting power)

     the Board of Directors  may, at its election,  as of the effective  time of
such  transaction,  either  (1)  change  the  number and kind of shares of stock
(including  substitution of shares of another corporation) and exercise price in
the manner it deems  appropriate,  or (2) purchase the Option from the Holder by
tendering  cash equal to the Fair Market Value of the Stock  represented  by the
Option  less the  exercise  price of the  Option  specified  in this  Agreement,
without  regard to the  determination  as to the  periods  and  installments  of
exercisability made pursuant to this Agreement,  if (and only if) the Option has
not at that time expired or been terminated.
     10. Committee Authority. Any question concerning the interpretation of this
Agreement,  any adjustments  required to be made under this  Agreement,  and any
controversy  which may arise under this  Agreement  shall be  determined  by the
Committee in its sole discretion.

     11. Plan Controls. The terms of this Agreement are governed by the terms of
the  Plan,  a copy of which is  attached  as  Exhibit  A and made a part of this
Agreement  as if  fully  set  forth  in this  Agreement,  and in the case of any
inconsistency between the terms of this Agreement and the terms of the Plan, the
terms of the Plan shall control.
     
     12.  Notice.  Whenever  any  notice is  required  or  permitted  under this
Agreement,  such notice must be in writing and personally delivered,  telecopied
(if  confirmed),  or sent by  mail.  Any  notice  required  or  permitted  to be
delivered under this Agreement shall be deemed to be delivered on the date which
it is personally  delivered,  or, whether actually received or not, on the third
business  day after it is  deposited  in the United  States  mail,  certified or
registered, postage prepaid, addressed to the person who is to receive it at the
address which such person has previously  specified by written notice  delivered
in accordance with this Agreement.  The Corporation or Holder may change, at any
time  and from  time to time,  by  written  notice  to the  other,  the  address
previously  specified for receiving  notices.  Until changed in accordance  with
this  Agreement,  the  Corporation  and  the  Holder  specify  their  respective
addresses as set forth below:
      Corporation:                          Cairn Energy USA, Inc.
                                    8235 Douglas Avenue, Suite 1221
                                    Dallas, Texas 75225
                                    Attention: Secretary

      Holder:                                                          
                                                                       
                                                                       


CORPDAL:47942.1  15467-00006
<PAGE>

     13. Information Confidential.  As partial consideration for the granting of
this Nonstatutory  Option,  the Holder agrees that he will keep confidential all
information  and  knowledge  that he has  relating  to the  manner and amount of
participation  in the Plan;  provided,  however,  that such  information  may be
disclosed  as required  by law and may be given in  confidence  to the  Holder's
spouse, tax and financial advisors,  or to a financial institution to the extent
that such information is necessary to secure a loan.

     IN WITNESS  WHEREOF,  the  Corporation  has  caused  this  Agreement  to be
executed  and the Holder has executed  this  Agreement on the day and year first
above written.


                                            "CORPORATION"

                                            CAIRN ENERGY USA, INC.



                                            By:                                
                                                                               




                                            "HOLDER"



                                                                              


CORPDAL:47942.1  15467-00006


                                                    EXHIBIT 5.1


<PAGE>

Cairn Energy USA, Inc.
May __, 1996
Page 2








                                                   June 3, 1996


Cairn Energy USA, Inc.
8235 Douglas Avenue, Suite 1221
Dallas, Texas  75225

      Re:         Registration Statement on Form S-8

Gentlemen:

     We have acted as counsel to Cairn Energy USA,  Inc. a Delaware  corporation
(the  "Corporation"),  in connection  with the  preparation of the  Registration
Statement  on Form  S-8 (the  "Registration  Statement")  to be  filed  with the
Securities and Exchange  Commission on June 3, 1996, under the Securities Act of
1933, as amended (the "Securities Act"),  relating to 870,000 shares of the $.01
par value  common  stock (the  "Common  Stock") of the  Corporation  that may be
offered through the exercise of stock options (the "Options")  granted under the
Cairn Energy USA,  Inc.  1993 Stock  Option Plan and the Cairn Energy USA,  Inc.
1993 Directors Stock Option Plan (collectively, the "Plans").

     You have  requested  the opinion of this firm with respect to certain legal
aspects of the proposed offering. In connection therewith,  we have examined and
relied upon the original,  or copies identified to our satisfaction,  of (1) the
Certificate of Incorporation and the Bylaws of the Corporation,  as amended; (2)
minutes and records of the corporate proceedings of the Corporation with respect
to the  establishment of the Plan, the reservation of 870,000  additional shares
of  Common  Stock to be issued  under  the  Plans and to which the  Registration
Statement relates,  the issuance of shares of Common Stock pursuant to the Plans
and related  matters;  (3) the  Registration  Statement  and  exhibits  thereto,
including the Plans;  and (4) such other  documents and  instruments  as we have
deemed necessary for the expression of the opinions herein contained.  In making
the foregoing  examinations,  we have assumed the  genuineness of all signatures
and the  authenticity  of all documents  submitted to us as  originals,  and the
conformity to original  documents of all documents  submitted to us as certified
or photostatic copies. As to various questions of fact material to this opinion,
and as to the content and form of the Certificate of Incorporation,  the Bylaws,
minutes,   records,   resolutions   and  other  documents  or  writings  of  the
Corporation, we have relied, to the extent we deem reasonably appropriate,  upon
representations  or certificates of officers or directors of the Corporation and
upon  documents,  records and  instruments  furnished to us by the  Corporation,
without independent check or verification of their accuracy.
     Based upon our  examination  and  consideration  of, and  reliance  on, the
documents  and other  matters  described  above,  we are of the opinion that the
Corporation  presently has available at least 870,000  shares of authorized  but
unissued  shares of Common Stock and/or  treasury  shares of Common Stock.  From
these shares of Common Stock,  the 870,000 shares of Common Stock proposed to be
offered  pursuant to the  exercise of Options  granted  through the Plans may be
issued.  Assuming that: (i) the  outstanding  Options were duly granted and that
the shares to be sold in the future through the Plans are all in accordance with
the terms of the applicable  Plan,  (ii) the shares of Common Stock to be issued
in the future are duly  issued in  accordance  with the terms of the  applicable
Plan,  (iii) the  Corporation  maintains an adequate  number of  authorized  but
unissued shares and/or treasury shares of Common Stock available for issuance to
those  persons  who  exercise  Options  granted  under the  Plans,  and (iv) the
consideration  for  shares  of Common  Stock  issued  pursuant  to the Plans and
pursuant to such Options is actually  received by the Corporation as provided in
the applicable Plan and exceeds the par value of such shares, then the shares of
Common  Stock issued in  accordance  with the terms of the  applicable  Plan and
issued  pursuant to the exercise of the Options  granted under and in accordance
with the terms of the  applicable  Plan will be duly and validly  issued,  fully
paid and nonassessable.

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<PAGE>

Cairn Energy USA, Inc.
May __, 1996
Page 2



     We hereby  consent  to the  filing of this  opinion  as an  exhibit  to the
Registration  Statement and to references to our firm included in or made a part
of the Registration  Statement.  In giving this consent, we do not admit that we
come within the category of person whose consent is required  under Section 7 of
the Securities  Act or the Rules and  Regulations of the Securities and Exchange
Commission thereunder.
                                             Very truly yours,
 
                                             JENKENS & GILCHRIST,
                                             a Professional Corporation

 
                                             Mark D. Wigder


CORPDAL:47942.1  15467-00006



                                                   EXHIBIT 23.1



CORPDAL:47942.1  15467-00006
<PAGE>

                                  EXHIBIT 23.1

                                        CONSENT OF INDEPENDENT ACCOUNTANTS

     We consent to the incorporation by reference in the Registration  Statement
(Form S-8) as filed with the Securities and Exchange  Commission on June 4, 1996
pertaining to the Cairn Energy USA, Inc. 1993 Stock Option Plan and Cairn Energy
USA,  Inc.  1993  Directors  Stock  Option Plan and therein of our report  dated
February 16, 1996,  with respect to the  consolidated  financial  statements  of
Cairn  Energy USA,  Inc.  inclued in its Annual  Report (Form 10-K) for the year
ended December 31, 1995, filed with the Securities and Exchange Commission.
 
                                                     ERNST & YOUNG


Dallas, Texas
June 4, 1996


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                                                   EXHIBIT 23.2



CORPDAL:47942.1  15467-00006

<PAGE>


                                          CONSENT OF RYDER SCOTT COMPANY

     We consent to the incorporation by reference in the Registration  Statement
of Cairn Energy USA,  Inc.  (the  "Company")  on Form S-8 of  references  to the
results of our reserve  review  letter,  dated January 1, 1996, in the Company's
Annual Report on Form 10-K for the year ended December 31, 1995.
                                            RYDER SCOTT COMPANY
                                            PETROLEUM ENGINEERS


Houston, Texas
May 31, 1996


CORPDAL:47942.1  15467-00006


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