Ira H. Cram, 1948. "Cumberland Oil Field, Bryan and Marshall Counties, Oklahoma", Structure of Typical American Oil Fields: A Symposium of the Relation of Oil Accumulation to Structure, J. V. Howell
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The Cumberland oil field is on a closed, faulted anticline the discovery of which was the result of a coordinated program of surface, subsurface, magnetic, and seismic exploration. Comanche formations exposed in the area rest unconformably on the Springer formation of Pennsylvanian age. The stratigraphic section of Springer and older formations penetrated in drilling does not differ materially in thickness and character from the equivalent section exposed in the Arbuckle Mountains on the northwest. The closed faulted anticline is in a down-faulted block of sedimentary rocks on the south flank of the Arbuckle Mountains. The structure, probably formed in late Pennsylvanian pre-Permian time, is not reflected in the normally dipping Comanche beds. All oil produced to date from this structural trap comes from sands of the Bromide, McLish, and Oil Creek formations of the Simpson group of Ordovician age. Total production as of January 31, 1947, was a little less than 22½ million barrels of good average-grade Mid-Continent crude.
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Structure of Typical American Oil Fields: A Symposium of the Relation of Oil Accumulation to Structure
Modern petroleum geology in the United States had its beginning in the first decade of the 20th Century when the U.S. Geological Survey began mapping the structure of the rocks in and near old fields in order to discover the various types of structural conditions under which oil and gas are trapped. Structural geology has evolved as a branch of the broader science far more rapidly than have methods of mapping the attitude of rocks at the surface. This volume, published in the late 1920s, was designed to afford authoritative and modern descriptions of the structure of typical oil fields in the United States. Each of the 39 fields contained here is described by an author who is intimately familiar with the available data. The relationship of structure at the surface and at depth for different terranes is clearly set forth wherever the strata are not parallel. The volume concludes with a summary paper on the role of geologic structure in the accumulation of petroleum. Fields include: Florence, Colorado; Stephens, Arkansas; Kevin-Sunburst, Montana; Bradford Pennsylvania; and Salt Creek, Wyoming.