8-K

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): March 15, 2005

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:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

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

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01               Other Events.

On March 15, 2005, Marathon issued a press release announcing that the Hurricane Ivan-damaged Petronius platform in the Gulf of Mexico has resumed production.  A copy of the press release is filed herewith as Exhibit 99.1 and incorporated herein by reference.

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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: March 15, 2005	By:	/s/ A.G. Adkins
		A.G. Adkins
		Vice President-Accounting and Controller

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EX-99.1

Exhibit 99.1

MARATHON ANNOUNCES IVAN-DAMAGED

PETRONIUS’ RETURN TO PRODUCTION

HOUSTON, March 15, 2005 — Marathon Oil Corporation (NYSE: MRO) today announced that its Hurricane Ivan—damaged Petronius platform in the Gulf of Mexico has resumed production.  Currently, Petronius is producing at approximately 75 percent of pre-Hurricane Ivan rates of some 53,000 gross barrels of oil equivalent per day, with efforts underway to ramp up production to pre-Ivan levels by the end of March.

As Hurricane Ivan approached the Alabama Gulf Coast in the fall of 2004, its eye passed almost directly over Petronius.  Significant damage occurred to the rig crew quarters, production equipment, and deck structures.

Petronius is located approximately 130 miles (200 km) southeast of New Orleans. Prior to Hurricane Ivan, Petronius averaged 42,000 gross barrels of crude oil and 65 million gross cubic feet of natural gas per day.  ChevronTexaco is the operator of Petronius with a 50 percent interest, with Marathon holding the remaining 50 percent interest.

Marathon Oil Corporation is a fully integrated energy company engaged in worldwide exploration, development, production and transportation of crude oil and natural gas.  Through its 62 percent ownership in Marathon Ashland Petroleum LLC, the company refines, markets and transports petroleum products in the United States.

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This news release contains forward-looking statements concerning the timing of resumption of production from the Petronius platform.  Some factors that could affect the timing of this production include unforeseen problems arising from repair work or severe weather conditions.  In accordance with “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995, Marathon Oil Corporation has included in its Annual Report on Form 10-K for the year ended December 31, 2004, cautionary language identifying important factors, though not necessarily all such factors, that could cause future outcomes to differ materially from those set forth in the forward-looking statements.

Media Relations Contact:	Paul Weeditz	713-296-3910
Investor Relations Contacts:	Ken Matheny	713-296-4114
	Howard Thill	713-296-4140