To an undisclosed buyer, Marathon Oil Corp. said it signed a deal to unload the majority of its assets in the Gulf of Mexico already in production. Marathon said it was selling off its acreage in the Gulf of Mexico for $205 million. “These assets represent a majority of the company’s operated and non-operated producing properties in the Gulf of Mexico,” Marathon said in a statement. Onshore, the company reported mix production results from its U.S. operations. In North Dakota, the No. 2 oil producer in the country, the company reported a 22 percent increase in production from second quarter 2014 […]