Stratigraphic Type Oil Fields
The Edison oil field, 12 miles southeast of Bakersfield, Kern County, California, was discovered in 1934.
Oil is produced from several sands, the lower of which have been grouped together and designated as the “Lower Duff” zone. The lower sands are oil reservoirs of the stratigraphic trap type.
John E. Blixt, 1941. "Cut Bank Oil and Gas Field, Glacier County, Montana", Stratigraphic Type Oil Fields, A. I. Levorsen, N. Wood Bass, Ross L. Heaton, W. S. W. Kew, D. Perry Olcott, Theron Wasson
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The Cut Bank oil and gas field is in Glacier County, Montana, 50 miles east of Glacier National Park, and extends to within 3 miles of the Canadian border. It is 31 miles long and up to 10 miles wide. The field is on the west flank of the Sweetgrass arch. The structure is monoclinal and the regional dip is about 75 feet per mile slightly south of west. The trend of the producing area is parallel with the regional strike. It is still in an active stage of development and as of July 1, 1940, 506 oil wells,...