U.S. Diversified Group References U.S. Diversified Group American corporation Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: USX Corporation…Texas Oil & Gas, and U.S. Diversified Group. After separating the businesses of U.S. Steel and Marathon in 2001, USX was renamed Marathon Oil Corporation in 2002. Read More…Texas Oil & Gas, and U.S. Diversified Group. After separating the businesses of U.S. Steel and Marathon in 2001, USX was renamed Marathon Oil Corporation in 2002. Read More