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<P ALIGN="CENTER">UNITED STATES</P>


<P ALIGN="CENTER">SECURITIES AND EXCHANGE COMMISSION</P>


<P ALIGN="CENTER">Washington, D.C. 20549</P>


<P ALIGN="JUSTIFY"></P>


<B><P ALIGN="CENTER">FORM 8-K</P>


</B><P ALIGN="JUSTIFY"></P>


<B><P ALIGN="CENTER">CURRENT REPORT</P>


</B><P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&nbsp;</P>


<B><P ALIGN="CENTER">Pursuant to Section&nbsp;13 or 15(d) of the Securities Exchange Act of 1934</P>


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<P ALIGN="JUSTIFY">&nbsp;</P>


<P ALIGN="CENTER">Date of Report (Date of earliest event reported): <B>October 14, 2004</P>


</B><P ALIGN="JUSTIFY"></P>


<B><P ALIGN="CENTER">&nbsp;</P>


<P ALIGN="CENTER">MARATHON OIL CORPORATION</P>


</B><P ALIGN="CENTER">(Exact name of registrant as specified in its charter)</P>


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<P ALIGN="CENTER"><CENTER><TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=581>


<TR><TD WIDTH="3%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="33%" VALIGN="TOP">


<B><P ALIGN="CENTER">Delaware</B></TD>


<TD WIDTH="35%" VALIGN="TOP">


<B><P ALIGN="CENTER">1-5153</B></TD>


<TD WIDTH="30%" VALIGN="TOP">


<B><P ALIGN="CENTER">25-0996816</B></TD>


</TR>


<TR><TD WIDTH="3%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="33%" VALIGN="TOP">


<P ALIGN="CENTER">(State or other jurisdiction of incorporation)</TD>


<TD WIDTH="35%" VALIGN="TOP">


<P ALIGN="CENTER">(Commission File Number)</TD>


<TD WIDTH="30%" VALIGN="TOP">


<P ALIGN="CENTER">(IRS Employer Identification No.)</TD>


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</TABLE>


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<P ALIGN="JUSTIFY">&nbsp;</P>


<P ALIGN="CENTER"><CENTER><TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=574>


<TR><TD WIDTH="3%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="56%" VALIGN="TOP">


<B><P ALIGN="CENTER">5555 San Felipe Road, Houston, Texas</B></TD>


<TD WIDTH="4%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="37%" VALIGN="TOP">


<B><P ALIGN="CENTER">77056-2723</B></TD>


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<TR><TD WIDTH="3%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="56%" VALIGN="TOP">


<P ALIGN="CENTER">(Address of principal executive offices)</TD>


<TD WIDTH="4%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="37%" VALIGN="TOP">


<P ALIGN="CENTER">(Zip Code)</TD>


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<P ALIGN="CENTER">Registrant's telephone number, including area code: (<B>713) 629-6600</P>


</B><P ALIGN="JUSTIFY"></P>


<P ALIGN="CENTER">______________________________</P>


<B><P ALIGN="CENTER"></P></B>


<TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=643>


<TR><TD WIDTH="2%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="98%" VALIGN="TOP">


<P>Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</TD>


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<B><P ALIGN="CENTER"></P></B>


<TABLE CELLSPACING=0 BORDER=0 CELLPADDING=7 WIDTH=643>


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<P ALIGN="JUSTIFY"><FONT FACE="Wingdings 2">&#163;</FONT>


</P>


<P ALIGN="JUSTIFY"><FONT FACE="Wingdings 2">&#163;</FONT>


</P>


<P ALIGN="JUSTIFY"><FONT FACE="Wingdings 2">&#163;</FONT>


</P>


<P ALIGN="JUSTIFY">&nbsp;</P>


<P ALIGN="JUSTIFY"><FONT FACE="Wingdings 2">&#163;</FONT>


</P>


<P ALIGN="JUSTIFY"></TD>


<TD WIDTH="96%" VALIGN="TOP">


<P>Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</P>


<P>Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</P>


<P>Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</P>


<P>Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</TD>


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<P ALIGN="CENTER">______________________________</P>


<B><P ALIGN="JUSTIFY"></P></B>


<TABLE BORDER CELLSPACING=2 BORDERCOLOR="#008000" CELLPADDING=7 WIDTH=606>


<TR><TD WIDTH="13%" VALIGN="TOP">


<B><P>Item 2.02&#9;</B></TD>


<TD WIDTH="87%" VALIGN="TOP" COLSPAN=6>


<B><P>Results of Operations and Financial Condition</B>.</TD>


</TR>


<TR><TD WIDTH="13%" VALIGN="TOP" HEIGHT=103><P></P></TD>


<TD WIDTH="87%" VALIGN="TOP" COLSPAN=6 HEIGHT=103>


<P ALIGN="JUSTIFY">On October 14, 2004, Marathon posted the following information on its website, updating estimated results on two long-term gas sales contracts related to its United Kingdom Brae gas production for the third quarter 2004.</P>


<FONT SIZE=1></FONT></TD>


</TR>


<TR><TD VALIGN="BOTTOM" COLSPAN=7 HEIGHT=27>


<B><FONT FACE="Century Gothic" SIZE=5><P ALIGN="CENTER">UK Gas Contract Mark-to-Market Gain(Loss)</B></FONT></TD>


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<TR><TD VALIGN="BOTTOM" COLSPAN=7 HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P ALIGN="CENTER">(Millions of dollars)</FONT></TD>


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<TR><TD WIDTH="31%" VALIGN="TOP" COLSPAN=2 BGCOLOR="#ffffff" HEIGHT=19>


<B><FONT FACE="Century Gothic" SIZE=1><P>&nbsp;</B></FONT></TD>


<TD WIDTH="16%" VALIGN="TOP" BGCOLOR="#ffffff" HEIGHT=19>


<B><FONT FACE="Century Gothic" SIZE=1><P ALIGN="CENTER">1Q</B></FONT></TD>


<TD WIDTH="15%" VALIGN="TOP" BGCOLOR="#ffffff" HEIGHT=19>


<B><FONT FACE="Century Gothic" SIZE=1><P ALIGN="CENTER">2Q</B></FONT></TD>


<TD WIDTH="13%" VALIGN="TOP" BGCOLOR="#ffffff" HEIGHT=19>


<B><FONT FACE="Century Gothic" SIZE=1><P ALIGN="CENTER">3Q</B></FONT></TD>


<TD WIDTH="13%" VALIGN="TOP" BGCOLOR="#ffffff" HEIGHT=19>


<B><FONT FACE="Century Gothic" SIZE=1><P ALIGN="CENTER">4Q</B></FONT></TD>


<TD WIDTH="13%" VALIGN="TOP" BGCOLOR="#ffffff" HEIGHT=19>


<B><FONT FACE="Century Gothic" SIZE=1><P ALIGN="CENTER">Year</B></FONT></TD>


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<TR><TD WIDTH="31%" VALIGN="BOTTOM" COLSPAN=2 HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P ALIGN="RIGHT">2002 <B>(a)</B></FONT></TD>


<TD WIDTH="16%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>          37 </FONT></TD>


<TD WIDTH="15%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>           (5)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>         (20)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>          26 </FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>          38 </FONT></TD>


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<TR><TD WIDTH="31%" VALIGN="BOTTOM" COLSPAN=2 HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P ALIGN="RIGHT">2003</FONT></TD>


<TD WIDTH="16%" VALIGN="BOTTOM" HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P>           (2)</FONT></TD>


<TD WIDTH="15%" VALIGN="BOTTOM" HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P>         (10)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P>         (21)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P>         (33)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P>         (66)</FONT></TD>


</TR>


<TR><TD WIDTH="31%" VALIGN="BOTTOM" COLSPAN=2 HEIGHT=17><P></P></TD>


<TD WIDTH="16%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="15%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


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<TR><TD WIDTH="31%" VALIGN="BOTTOM" COLSPAN=2 HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P ALIGN="RIGHT">2004 (unaudited):</FONT></TD>


<TD WIDTH="16%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="15%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


</TR>


<TR><TD WIDTH="31%" VALIGN="BOTTOM" COLSPAN=2 HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P ALIGN="RIGHT">Month 1 <B>(b)</B></FONT></TD>


<TD WIDTH="16%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="15%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P>           (5)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


</TR>


<TR><TD WIDTH="31%" VALIGN="BOTTOM" COLSPAN=2 HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P ALIGN="RIGHT">Month 2 <B>(b)</B></FONT></TD>


<TD WIDTH="16%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="15%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P>         (41)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


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<TR><TD WIDTH="31%" VALIGN="BOTTOM" COLSPAN=2 HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P ALIGN="RIGHT">Month 3 <B>(b)</B></FONT></TD>


<TD WIDTH="16%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="15%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17>


<FONT FACE="Arial" SIZE=2><P>         (83)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=17><P></P></TD>


</TR>


<TR><TD WIDTH="31%" VALIGN="BOTTOM" COLSPAN=2 HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P ALIGN="RIGHT">2004 Totals</FONT></TD>


<TD WIDTH="16%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>          14 </FONT></TD>


<TD WIDTH="15%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>         (95)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>       (129)</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>&nbsp;</FONT></TD>


<TD WIDTH="13%" VALIGN="BOTTOM" HEIGHT=18>


<FONT FACE="Arial" SIZE=2><P>       (210)</FONT></TD>


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<TR><TD VALIGN="BOTTOM" COLSPAN=7 HEIGHT=31>


<B><FONT FACE="Verdana" SIZE=2><P ALIGN="JUSTIFY">(a)</B>  First quarter 2002 results include $20 million reported as a cumulative change in                              accounting  principle</FONT></TD>


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<TR><TD VALIGN="BOTTOM" COLSPAN=7 HEIGHT=17>


<B><FONT FACE="Verdana" SIZE=2><P ALIGN="JUSTIFY">(b)</B>  Estimated</FONT></TD>


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<TR><TD WIDTH="3%" VALIGN="TOP">&nbsp;</TD>


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<B><P ALIGN="CENTER">SIGNATURE</B></TD>


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<TR><TD WIDTH="3%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="97%" VALIGN="TOP">


<P>Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</TD>


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<DIR>


<DIR>


<DIR>


<DIR>


<DIR>


<DIR>


<DIR>


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<P ALIGN="JUSTIFY">MARATHON OIL CORPORATION</P>


<P ALIGN="JUSTIFY"></P>


<P ALIGN="JUSTIFY">&nbsp;</P></DIR>


</DIR>


</DIR>


</DIR>


</DIR>


</DIR>


</DIR>


</DIR>


</DIR>


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<TR><TD WIDTH="3%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="29%" VALIGN="TOP">


<P>Date: October 14, 2004</TD>


<TD WIDTH="17%" VALIGN="TOP">


<P ALIGN="RIGHT">By:</TD>


<TD WIDTH="51%" VALIGN="TOP">


<U><P>  /s/ A.G. Adkins&#9;&#9;</U></TD>


</TR>


<TR><TD WIDTH="3%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="29%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="17%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="51%" VALIGN="TOP">


<P>A.G. Adkins</TD>


</TR>


<TR><TD WIDTH="3%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="29%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="17%" VALIGN="TOP">&nbsp;</TD>


<TD WIDTH="51%" VALIGN="TOP">


<P>Vice President-Accounting and Controller</TD>


</TR>


</TABLE>


</CENTER></P>





<I><P ALIGN="JUSTIFY"></P>


</I><P>&nbsp;</P>


<P>&nbsp;</P>


<P ALIGN="JUSTIFY">&nbsp;</P></BODY>


</HTML>
[{"type": "8-K", "sequence": "1", "filename": "rrd54880.htm", "description": "UK GAS CONTRACT MARK-TO-MARKET GAIN (LOSS)", "secsgml_size_bytes": 12010}]
{"company-data": {"conformed-name": "MARATHON OIL CORP", "cik": "0000101778", "assigned-sic": "2911", "irs-number": "250996816", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "033-07065", "film-number": "041079463"}, "business-address": {"street1": "P O BOX 3128", "city": "HOUSTON", "state": "TX", "zip": "77253-3128", "phone": "7136296600"}, "former-company": [{"former-conformed-name": "USX CORP", "date-changed": "19920703"}, {"former-conformed-name": "UNITED STATES STEEL CORP/DE", "date-changed": "19860714"}]}
_
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported):
October 14, 2004
MARATHON OIL CORPORATION
(Exact name of registrant as specified in its charter)
Delaware
1-5153
25-0996816
(State or other jurisdiction of incorporation)
(Commission File Number)
(IRS Employer Identification No.)
5555 San Felipe Road, Houston, Texas
77056-2723
(Address of principal executive offices)
(Zip Code)
Registrant's telephone number, including area code: (
713) 629-6600
______________________________
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
£
£
£
£
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
______________________________
Item 2.02
Results of Operations and Financial Condition
.
On October 14, 2004, Marathon posted the following information on its website, updating estimated results on two long-term gas sales contracts related to its United Kingdom Brae gas production for the third quarter 2004.
UK Gas Contract Mark-to-Market Gain(Loss)
(Millions of dollars)
1Q
2Q
3Q
4Q
Year
2002
(a)
37
(5)
(20)
26
38
2003
(2)
(10)
(21)
(33)
(66)
2004 (unaudited):
Month 1
(b)
(5)
Month 2
(b)
(41)
Month 3
(b)
(83)
2004 Totals
14
(95)
(129)
(210)
(a)
First quarter 2002 results include $20 million reported as a cumulative change in                              accounting  principle
(b)
Estimated
SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
MARATHON OIL CORPORATION
Date: October 14, 2004
By:
/s/ A.G. Adkins
A.G. Adkins
Vice President-Accounting and Controller