The Cat Creek field was the most promising oil field opened in the United States during the year 1919, and is the first one opened entirely within Montana. It was examined in a reconnoissance way for coal by C. F. Bowen, of the U. S. Geological Survey during the summer of 1912, but was not considered of sufficient importance as an oil possibility at that time to warrant an oil report or its withdrawal. The U. S. Geological Survey coal report1 includes a map showing the extreme western part of the Cat Creek anticline. It was the V-shaped outcrop...

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