SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                 SCHEDULE 13D/A


                    Under the Securities Exchange Act of 1934
                               (Amendment No. 4) *


                      Penn Virginia Resource Partners, L.P.
--------------------------------------------------------------------------------
                                (Name of Issuer)

              Common units, representing limited partner interests
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    707884102
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                 Nancy M. Snyder
                         Penn Virginia Resource GP, LLC
                          Three Radnor Corporate Center
                               100 Matsonford Road
                                    Suite 230
                           Radnor, Pennsylvania 19087
                                 (610) 687-8900
--------------------------------------------------------------------------------
            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                               December 30, 2004
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check
the following box [ ].

Note: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Section 240.13d-7(b) for
other parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

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 (however, see the
Notes).




                                 SCHEDULE 13D/A


CUSIP No. 707884102
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         (1)      Name of Reporting Person.
                  I.R.S. Identification Nos. of Above Persons (entities only).

                  Peabody Natural Resources Company
                  51-0332232
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         (2)      Check the Appropriate Box if a Member of a Group
                                                                         (a) [ ]
                                                                         (b) [ ]
--------------------------------------------------------------------------------
         (3)      SEC Use Only

--------------------------------------------------------------------------------
         (4)      Source of Funds (See instructions)

                  OO
--------------------------------------------------------------------------------
         (5)      Check if Disclosure of Legal Proceedings is Required Pursuant
                  to Items 2(d) or 2(e)                                      [ ]

--------------------------------------------------------------------------------
         (6)      Citizenship or Place of Organization

                  Delaware

--------------------------------------------------------------------------------
                  (7)      Sole Voting Power                      836,851

                  
Number of                  -----------------------------------------------------
Units Bene-       (8)      Shared Voting Power                    0
 ficially
 Owned by         
Each Report-               -----------------------------------------------------
 ing Person       (9)      Sole Dispositive Power                 836,851
   With

                           -----------------------------------------------------
                  (10)     Shared Dispositive Power               0


--------------------------------------------------------------------------------
         (11)     Aggregate Amount Beneficially Owned by Each Reporting Person

                                                                  836,851

--------------------------------------------------------------------------------
         (12)     Check if the Aggregate Amount in Row (11) Excludes Certain 
                  Units (See Instructions)                                   [ ]


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

                                                                   8.0%*

--------------------------------------------------------------------------------
         (14)     Type of Reporting Person (See Instructions)   PN


----------

* Based on 10,424,681 Common Units outstanding as of November 1, 2004 as
reported in Issuer's Quarterly Report on Form 10-Q for the quarter ended 
September 30, 2004. Excludes 1,307 units held in escrow by, and registered in 
the name of, U.S. Bank National Association, as escrow agent.




                                 SCHEDULE 13D/A


CUSIP No. 707884102
--------------------------------------------------------------------------------
         (1)      Name of Reporting Person.
                  I.R.S. Identification Nos. of Above Persons (entities only).

                  Gold Fields Mining, LLC 
                  36-2079582
--------------------------------------------------------------------------------
         (2)      Check the Appropriate Box if a Member of a Group
                                                                         (a) [ ]
                                                                         (b) [ ]
--------------------------------------------------------------------------------
         (3)      SEC Use Only

--------------------------------------------------------------------------------
         (4)      Source of Funds (See instructions)

                  N/A
--------------------------------------------------------------------------------
         (5)      Check if Disclosure of Legal Proceedings is Required Pursuant
                  to Items 2(d) or 2(e)                                      [ ]

--------------------------------------------------------------------------------
         (6)      Citizenship or Place of Organization



                  Delaware

--------------------------------------------------------------------------------
                  (7)      Sole Voting Power                      836,851

                  
Number of                  -----------------------------------------------------
Units Bene-       (8)      Shared Voting Power                    0
 ficially
 Owned by         
Each Report-               -----------------------------------------------------
 ing Person       (9)      Sole Dispositive Power                 836,851
   With

                           -----------------------------------------------------
                  (10)     Shared Dispositive Power               0


--------------------------------------------------------------------------------
         (11)     Aggregate Amount Beneficially Owned by Each Reporting Person

                                                                  836,851

--------------------------------------------------------------------------------
         (12)     Check if the Aggregate Amount in Row (11) Excludes Certain 
                  Units (See Instructions)                                   [ ]


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

                                                                   8.0%*

--------------------------------------------------------------------------------
         (14)     Type of Reporting Person (See Instructions)   OO


----------

* Based on 10,424,681 Common Units outstanding as of November 1, 2004 as
reported in Issuer's Quarterly Report on Form 10-Q for the quarter ended 
September 30, 2004. Excludes 1,307 units held in escrow by, and registered in 
the name of, U.S. Bank National Association, as escrow agent.




                                 SCHEDULE 13D/A


CUSIP No. 707884102
--------------------------------------------------------------------------------
         (1)      Name of Reporting Person.
                  I.R.S. Identification Nos. of Above Persons (entities only).

                  Peabody Energy Corporation
                  13-4004153
--------------------------------------------------------------------------------
         (2)      Check the Appropriate Box if a Member of a Group
                                                                         (a) [ ]
                                                                         (b) [ ]
--------------------------------------------------------------------------------
         (3)      SEC Use Only

--------------------------------------------------------------------------------
         (4)      Source of Funds (See instructions)

                  N/A
--------------------------------------------------------------------------------
         (5)      Check if Disclosure of Legal Proceedings is Required Pursuant
                  to Items 2(d) or 2(e)                                      [ ]

--------------------------------------------------------------------------------
         (6)      Citizenship or Place of Organization

                  Delaware

--------------------------------------------------------------------------------
                  (7)      Sole Voting Power                      836,851

                  
Number of                  -----------------------------------------------------
Units Bene-       (8)      Shared Voting Power                    0
 ficially
 Owned by         
Each Report-               -----------------------------------------------------
 ing Person       (9)      Sole Dispositive Power                 836,851
   With

                           -----------------------------------------------------
                  (10)     Shared Dispositive Power               0


--------------------------------------------------------------------------------
         (11)     Aggregate Amount Beneficially Owned by Each Reporting Person

                                                                  836,851

--------------------------------------------------------------------------------
         (12)     Check if the Aggregate Amount in Row (11) Excludes Certain 
                  Units (See Instructions)                                   [ ]


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

                                                                   8.0%*

--------------------------------------------------------------------------------
         (14)     Type of Reporting Person (See Instructions)   HC/CO


----------

* Based on 10,424,681 Common Units outstanding as of November 1, 2004 as
reported in Issuer's Quarterly Report on Form 10-Q for the quarter ended
September 30, 2004. Excludes 1,307 units held in escrow by, and registered in
the name of, U.S. Bank National Association, as escrow agent.



                         Amendment No. 4 to Schedule 13D

         This Amendment No. 4 to Schedule 13D (this "Amendment") is filed by the
Reporting Persons as an amendment to the initial statement on Schedule 13D as
filed with the Securities and Exchange Commission on December 8, 2003 (the
"Original Schedule 13D"), as amended by Amendment No. 1 to Schedule 13D filed
with the Securities and Exchange Commission on December 15, 2003 (the "First
Amendment"), as further amended by Amendment No. 2 to Schedule 13D filed with
the Securities and Exchange Commission on January 9, 2004 (the "Second
Amendment") as further amended by Amendment No. 3 to Schedule 13D filed with the
Securities and Exchange Commission on March 31, 2004 (the "Third Amendment",
and together with the Original Schedule 13D, the First Amendment, the Second
Amendment and the Third Amendment the "Schedule 13D"). Capitalized terms used
but not defined in this Amendment have the meanings set forth in the Schedule
13D. The Schedule 13D is hereby amended and supplemented as follows:

ITEM 2.           IDENTITY AND BACKGROUND

         Item 2 of the Schedule 13D is hereby amended to report that Gold Fields
Mining Corporation, a Delaware corporation, converted into a Delaware limited 
liability company with the name Gold Fields Mining, LLC. All references to Gold 
Fields in the Schedule 13D now refer to Gold Fields Mining, LLC, a Delaware 
limited liability company.

         Item 2 of the Schedule 13D also is hereby amended to replace Appendix A
to the First Amendment with Appendix A to this Amendment.

         Appendix A to this Amendment includes, as of the date of this
Amendment, the name, state of incorporation or organization, principal business,
and principal place of business of each general partner of PNRC. Appendix A also
includes, as of the date of this Amendment, the names, residence or business
addresses, citizenship and present principal occupations or employment of the
executive officers and directors of (1) Parent, (2) Gold Fields and (3) each
other general partner of PNRC.

ITEM 5.           INTEREST IN SECURITIES OF THE ISSUER

         Item 5 of the Schedule 13D is hereby amended to read in its entirety as
follows:

(a) Based on the information reported by Issuer in its Quarterly Report on Form
10-Q for the quarter ended September 30, 2004, there were 10,424,681 Common
Units outstanding as of November 1, 2004.

         As of December 30, 2004, PNRC owns 836,851 Common Units, representing
8.0% of the outstanding Common Units of Issuer, based on the number of Common
Units outstanding as of November 1, 2004.

         As of December 30, 2004, Gold Fields may be deemed to beneficially
own, by virtue of its ownership of PNRC, the same 836,851 Common Units,
representing 8.0% of the outstanding Common Units of Issuer, based on the number
of Common Units outstanding as of November 1, 2004.

         As of December 30, 2004, Parent may be deemed to beneficially own, by
virtue of its ownership of PNRC and Gold Fields, the same 836,851 Common
Units, representing 8.0% of the outstanding Common Units of Issuer, based on
the number of Common Units outstanding as of November 1, 2004.

         In connection with the foregoing acquisition of Common Units by PNRC,
Issuer placed 52,700 Common Units in escrow pending transfer to Issuer of
certain coal mineral estates in certain parcels and tracts of land. On March 24,
2004, PNRC received 51,393 of these Common Units from the escrow following the
transfer of some of the coal mineral estates to the Issuer, and now only 1,307
Common Units remain in escrow. The remaining 1,307 Common Units held in escrow
are registered in the name of U.S. Bank National Association, as escrow agent.
If the remaining coal mineral estates are transferred to Issuer prior to the
deadline in the escrow agreement, the remaining 1,307 Common Units will be
released from escrow to PNRC.

(b) PNRC has sole power to vote or direct the vote and to dispose or to direct
the disposition of the Common Units beneficially owned by it. Gold Fields, by
virtue of its ownership of PNRC, may be deemed to have the power to vote or
direct the vote and to dispose or to direct the disposition of the Common Units
beneficially owned by PNRC. Parent, by virtue of its ownership of PNRC and Gold
Fields, may be deemed to have the power to vote or direct the vote and to
dispose or to direct the disposition of the Common Units beneficially owned by
PNRC.

(c) PNRC completed the sale of 200,000 Common Units on December 30, 2004 with
net proceeds to PNRC of $50.27 per unit. The sale was made in compliance with
Rule 144 of the Securities Act of 1933. Except for that sale, no transactions in
Common Units were effected by the Reporting Persons, or to their knowledge, any
of the persons listed on Appendix A to the Schedule 13D since the filing of the
Third Amendment.

(d) No person is known by any Reporting Person to have the right to receive or
the power to direct the receipt 




of dividends from, or the proceeds from the sale of, any Common Units owned by
any Reporting Person.

(e)      Not applicable.



                                    SIGNATURE

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

Date: December 30, 2004

                                           PEABODY NATURAL RESOURCES COMPANY


                                           /s/ Roger B. Walcott, Jr.
                                           -------------------------------------
                                           Roger B. Walcott, Jr.
                                           President


                                           PEABODY ENERGY CORPORATION


                                           /s/ Roger B. Walcott, Jr.
                                           -------------------------------------
                                           Roger B. Walcott, Jr.
                                           Executive Vice President


                                           GOLD FIELDS MINING, LLC


                                           /s/ Roger B. Walcott, Jr.
                                           -------------------------------------
                                           Roger B. Walcott, Jr.
                                           President
















                                                                      APPENDIX A

                        PEABODY NATURAL RESOURCES COMPANY

                                GENERAL PARTNERS

Gold Fields Mining, LLC, a Delaware limited liability company
14062 Denver West Parkway
Suite 110
Golden, Colorado 80401-3301

Gold Fields Mining, LLC is a direct wholly owned subsidiary of Parent.

Peabody America, Inc., a Delaware corporation
701 Market Street
Suite 720
St. Louis, Missouri 63101-1826

Peabody America, Inc. is a direct wholly owned subsidiary of Gold Fields and an
indirect wholly owned subsidiary of Parent.




                            GOLD FIELDS MINING, LLC


                               EXECUTIVE OFFICERS

NAME/TITLE                                BUSINESS ADDRESS
----------                                ----------------
Roger B. Walcott, Jr.                     Gold Fields Mining, LLC 
President                                 14062 Denver West Parkway, Suite 110
                                          Golden, Colorado 80401-3301

Walter L. Hawkins, Jr.                    Gold Fields Mining, LLC 
Vice President and Treasurer              14062 Denver West Parkway, Suite 110
                                          Golden, Colorado 80401-3301

C.C. Kennedy                              Gold Fields Mining, LLC
Vice President, Secretary and             14062 Denver West Parkway, Suite 110
General Counsel                           Golden, Colorado 80401-3301

Richard A. Navarre                        Gold Fields Mining, LLC
Vice President                            14062 Denver West Parkway, Suite 110
                                          Golden, Colorado 80401-3301

John F. Quinn, Jr.                        Gold Fields Mining, LLC
Vice President                            14062 Denver West Parkway, Suite 110
                                          Golden, Colorado 80401-3301



All above individuals are citizens of the United States.




                              PEABODY AMERICA, INC.

                               BOARD OF DIRECTORS

NAME/TITLE                                   BUSINESS ADDRESS
----------                                   ----------------
Richard A. Navarre                           Peabody Energy Corporation
Executive Vice President and                 701 Market Street, Suite 760
Chief Financial Officer                      St. Louis, Missouri 63101
Peabody Energy Corporation

Roger B. Walcott, Jr.                        Peabody Energy Corporation
Executive Vice President -                   701 Market Street, Suite 760
Corporate Development                        St. Louis, Missouri 63101
Peabody Energy Corporation

                               EXECUTIVE OFFICERS

NAME/TITLE                                   BUSINESS ADDRESS
----------                                   ----------------
Roger B. Walcott, Jr.                        Peabody America, Inc.
President                                    701 Market Street, Suite 720
                                             St. Louis, Missouri 63101-1826

Walter L. Hawkins, Jr.                       Peabody America, Inc.
Vice President and Treasurer                 701 Market Street, Suite 720
                                             St. Louis, Missouri 63101-1826

Jeffery L. Klinger                           Peabody America, Inc.
Vice President and Secretary                 701 Market Street, Suite 720
                                             St. Louis, Missouri 63101-1826


John F. Quinn, Jr.                           Peabody America, Inc.
Vice President                               701 Market Street, Suite 720
                                             St. Louis, Missouri 63101-1826



All above individuals are citizens of the United States.




                           PEABODY ENERGY CORPORATION

                               BOARD OF DIRECTORS

NAME/TITLE                                   BUSINESS ADDRESS
----------                                   ----------------
B.R. Brown                                   Peabody Energy Corporation
Former Chief Executive Officer               701 Market Street, Suite 760
of publicly traded coal company              St. Louis, Missouri 63101

William A. Coley                             Peabody Energy Corporation
Former President of Duke Power               701 Market Street, Suite 760
                                             St. Louis, Missouri 63101

Irl F. Engelhardt                            Peabody Energy Corporation
Chairman and Chief Executive Officer         701 Market Street, Suite 760
                                             St. Louis, Missouri 63101

Henry Givens, Jr., PhD                       Peabody Energy Corporation
President of Harris-Stowe                    701 Market Street, Suite 760
State College - St. Louis                    St. Louis, Missouri 63101

William E. James                             Peabody Energy Corporation
Founding Partner of                          701 Market Street, Suite 760
RockPort Capital Partners LLC                St. Louis, Missouri 63101

Robert B. Karn, III                          Peabody Energy Corporation
Financial Consultant                         701 Market Street, Suite 760
                                             St. Louis, Missouri 63101

Henry E. Lentz                               Peabody Energy Corporation
Advisory Director of Lehman Brothers Inc.    701 Market Street, Suite 760
                                             St. Louis, Missouri 63101

William C. Rusnack                           Peabody Energy Corporation
Former President and CEO of                  701 Market Street, Suite 760
Premcor Inc.                                 St. Louis, Missouri 63101

James R. Schlesinger, PhD                    Peabody Energy Corporation
Chairman of the Board of Trustees of         701 Market Street, Suite 760
MITRE Corporation                            St. Louis, Missouri 63101

Blanche M. Touhill, PhD                      Peabody Energy Corporation
Chancellor Emeritus and Professor Emeritus   701 Market Street, Suite 760
at the University of Missouri - St. Louis    St. Louis, Missouri 63101

Sandra Van Trease                            Peabody Energy Corporation
Group President of BJC Healthcare            701 Market Street, Suite 760
                                             St. Louis, Missouri 63101

Alan H. Washkowitz                           Peabody Energy Corporation
Managing Director of Lehman Brothers Inc.    701 Market Street, Suite 760
                                             St. Louis, Missouri 63101


All above individuals are citizens of the United States.




                           PEABODY ENERGY CORPORATION

                               EXECUTIVE OFFICERS

NAME/TITLE                                   BUSINESS ADDRESS
----------                                   ----------------
Irl F. Engelhardt                            Peabody Energy Corporation
Chairman and Chief Executive Officer         701 Market Street, Suite 760
                                             St. Louis, Missouri 63101

Gregory H. Boyce                             Peabody Energy Corporation
President and Chief Operating Officer        701 Market Street, Suite 760
                                             St. Louis, Missouri 63101

Richard M. Whiting                           Peabody Energy Corporation
Executive Vice President -                   701 Market Street, Suite 760
Sales and Trading                            St. Louis, Missouri 63101

Roger B. Walcott, Jr.                        Peabody Energy Corporation
Executive Vice President -                   701 Market Street, Suite 760
Corporate Development                        St. Louis, Missouri 63101

Richard A. Navarre                           Peabody Energy Corporation
Executive Vice President and                 701 Market Street, Suite 760
Chief Financial Officer                      St. Louis, Missouri 63101

Fredrick D. Palmer                           Peabody Energy Corporation
Executive Vice President - Legal and         701 Market Street, Suite 760
External Affairs and Secretary               St. Louis, Missouri 63101

Sharon D. Fiehler                            Peabody Energy Corporation
Executive Vice President -                   701 Market Street, Suite 760
Human Resources and Administration           St. Louis, Missouri 63101

Jeffery L. Klinger                           Peabody Energy Corporation
Vice President - Legal Services and          701 Market Street, Suite 760
Assistant Secretary                          St. Louis, Missouri 63101


All above individuals are citizens of the United States.