DAWSON GEOPHYSICAL CO
SC 13D/A, 2000-11-15
OIL & GAS FIELD EXPLORATION SERVICES
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<PAGE>   1

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

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                  SCHEDULE 13D
                    Under the Securities Exchange Act of 1934

                                (Amendment No. 9)

                           DAWSON GEOPHYSICAL COMPANY
                                (Name of Issuer)

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

                        COMMON STOCK, $.33 1/3 PAR VALUE
                         (Title of Class of Securities)

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

                                   239359 10 2
                                 (CUSIP Number)

                            MR. RICHARD E. BLOHM, JR.
                              1415 LOUISIANA STREET
                              HOUSTON, TEXAS 77002
                                 (713) 739-6500
                       (Name, Address and Telephone Number
                     of Person Authorized to Receive Notices
                               and Communications)

                                 with a copy to:

                              MR. JOHN R. BRANTLEY
                          BRACEWELL & PATTERSON, L.L.P.
                        711 LOUISIANA STREET, SUITE 2900
                              HOUSTON, TEXAS 77002
                                  713-223-2900

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

                                NOVEMBER 13, 2000
             (Date of Event which Requires Filing of this Statement)

 If the filing person has previously filed a statement on Schedule 13G to
      report this acquisition that is the subject of this Schedule 13D, and
        is filing this Schedule because of Rule 13d-1(e), Rule 13d-1(f)
                 or Rule 13d-1(g), check the following box: [ ]

   The information required on the remainder of this cover page shall not be
      deemed to be "filed" for the purpose of Section 18 of the Securities
      Exchange Act of 1934 ("Act") or otherwise subject to the liabilities
          of that section of the Act but shall be subject to all other
                             provisions of the Act.

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

                                Page 1 of 7 Pages
<PAGE>   2
                        AMENDMENT NO. 9 TO SCHEDULE 13D

CUSIP NO. 239359 10 2                                          PAGE 2 OF 7 PAGES

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

1   Name of Reporting Person; S.S. or IRS Identification Number

    Pebbleton Corporation N.V.
--------------------------------------------------------------------------------
2   Check the Appropriate Box If A Member of a Group
    (a) [ ]

    (b) [X]
--------------------------------------------------------------------------------
3   SEC Use Only

--------------------------------------------------------------------------------
4   Source of Funds

    WC
--------------------------------------------------------------------------------
5   Check Box If Disclosure of Legal Proceedings Is Required Pursuant to
    Item 2(d) or 2(e)

    [ ]
--------------------------------------------------------------------------------
6   Citizenship or Place of Organization

    Netherlands Antilles
--------------------------------------------------------------------------------
7   Sole Voting Power

    0
--------------------------------------------------------------------------------
8   Shared Voting Power

    1,036,000
--------------------------------------------------------------------------------
9   Sole Dispositive Power

    0
--------------------------------------------------------------------------------
10   Shared Dispositive Power

     1,036,000
--------------------------------------------------------------------------------
11   Aggregate Amount Beneficially Owned by Each Reporting Person

     1,036,000
--------------------------------------------------------------------------------
12   Check Box If The Aggregate Amount In Row (11) Excludes Certain Shares

     [X]
--------------------------------------------------------------------------------
13   Percent of Class Represented by Amount in Row (11)

     19.1%
--------------------------------------------------------------------------------
14   Type of Reporting Person

     CO
--------------------------------------------------------------------------------


<PAGE>   3
                        AMENDMENT NO. 9 TO SCHEDULE 13D

CUSIP NO. 239359 10 2                                          PAGE 3 OF 7 PAGES

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

1   Name of Reporting Person; S.S. or IRS Identification Number

    Issam M. Fares
--------------------------------------------------------------------------------
2   Check the Appropriate Box If A Member of a Group
    (a) [ ]

    (b) [X]
--------------------------------------------------------------------------------
3   SEC Use Only

--------------------------------------------------------------------------------
4   Source of Funds

    AF
--------------------------------------------------------------------------------
5   Check Box If Disclosure of Legal Proceedings Is Required Pursuant to
    Item 2(d) or 2(e)

    [ ]
--------------------------------------------------------------------------------
6   Citizenship or Place of Organization

    Lebanese
--------------------------------------------------------------------------------
7   Sole Voting Power

    0
--------------------------------------------------------------------------------
8   Shared Voting Power

    1,036,000
--------------------------------------------------------------------------------
9   Sole Dispositive Power

    0
--------------------------------------------------------------------------------
10   Shared Dispositive Power

     1,036,000
--------------------------------------------------------------------------------
11   Aggregate Amount Beneficially Owned by Each Reporting Person

     1,036,000
--------------------------------------------------------------------------------
12   Check Box If The Aggregate Amount In Row (11) Excludes Certain Shares

     [X]
--------------------------------------------------------------------------------
13   Percent of Class Represented by Amount in Row (11)

     19.1%
--------------------------------------------------------------------------------
14   Type of Reporting Person

     IN
--------------------------------------------------------------------------------


<PAGE>   4

                                                               Page 4 of 7 Pages

                                  SCHEDULE 13D
                                 AMENDMENT NO. 9

         Unless otherwise defined or indicated in this Amendment No. 9,
capitalized terms which are used herein and are defined in the Schedule 13D
filed October 16, 1998, as heretofore amended ("Original 13D"), shall have the
meanings assigned to them in the Original 13D. All information herein with
respect to Dawson Geophysical Company, a Texas corporation, is to the best
knowledge and belief of the Reporting Persons, as defined herein.

ITEM 5. INTEREST IN SECURITIES OF THE ISSUER.

         (a) As set forth herein, Pebbleton owns 1,036,000 shares of Common
Stock of the Issuer, which represents approximately 19.1% of the Common Stock
outstanding as of June 30, 2000, as reported by the Issuer in its Quarterly
Report on Form 10-Q filed with the Securities and Exchange Commission
("Commission") on August 4, 2000.

         (b) Mr. Fares may be deemed to beneficially own and thereby share
voting and dispositive power over the shares of Common Stock described herein
which are held by Pebbleton. See Item 2 of the Original 13D.

         (c) Set forth in Exhibit A to this Amendment No. 9 is a list of all
transactions effected in the Issuer's Common Stock by Pebbleton within the past
sixty days, including (i) the identity of the person effecting transactions in
the Issuer's Common Stock; (ii) the date of the transaction; (iii) the amount of
securities involved; (iv) the price per share of Common Stock; and (v) where and
how the transaction was effected. Other than the transactions described in this
Item 5, none of the Reporting Persons nor to the knowledge of the Reporting
Persons, any of their officers or directors, has effected any transactions in
the Common Stock during the preceding sixty days.

ITEM 7. MATERIAL TO BE FILED AS EXHIBITS.

         Exhibit A    Transactions in the Common Stock by Pebbleton
<PAGE>   5

                                                               Page 5 of 7 Pages

                                   SIGNATURES


         After reasonable inquiry and to the best of the undersigned's knowledge
and belief, each of the undersigned hereby certifies that the information set
forth in this statement is true, complete and correct.


Dated: November 15, 2000                  PEBBLETON CORPORATION N.V.
                                          By: Issam M. Fares, Managing Director



                                          By: /s/ Richard E. Blohm, Jr.
                                              ----------------------------------
                                              Richard E. Blohm, Jr.
                                              Attorney in Fact


Dated: November 15, 2000                  Issam M. Fares



                                          By: /s/ Richard E. Blohm, Jr.
                                              ----------------------------------
                                              Richard E. Blohm, Jr.
                                              Attorney in Fact
<PAGE>   6

                                                               Page 6 of 7 Pages

                                INDEX TO EXHIBITS


         Exhibit A     Transactions in the Common Stock by Pebbleton


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