Marathon Oil in North America, including $600 million in the Eagle Ford and $200 million in the Bakken formation. The company owns 277,000 net acres in the Bakken formation. Marathon began as The Ohio Oil Company in 1887. In 1889, it was purchased by John D. Rockefeller's Standard Oil. It remained a part of Standard Oil until Standard Oil was broken in 1911. In 1930, The Ohio Oil Company bought the Transcontinental Oil Company and established the "Marathon" brand name. In 1962, the company changed its name to "Marathon Oil Company". In 1982, Mobil made a hostile offer to buy the company;
Heltne Oil Company after the war." It has two-toned decorative brickwork, which, "together with ornamental pilasters blend nicely with the more modern and functional aspects of the design. Large windows to display company products and accessories together with more spacious enclosed service bays reflect the changes taking place in the service station industry during the late 1930's." It was deemed "significant for its association with automobile travel along US 2 from the late 1930s through the early post-war era, as well as for its architecture. Heltne Oil Company The Heltne Oil Company is a site on the National Register of Historic Places located