In 1910 Arnold and Johnson published a report on this field, showing a low-angle overthrust fault as the controlling structural feature. Their description has been widely quoted in subsequent literature, and this structure will continue to be referred to as one of the few oil-bearing structures of that type. It therefore seems desirable to have some fresh word on the subject, and particularly whether the last twenty years have brought forth facts which make the original description inaccurate or misleading. Detailed areal mapping by the writer indicates that there is a low-angle overthrust fault present, but that it is complicated by many minor thrusts, and by a series of steep hade strike faults. The latter, rather than the overthrust, determine the position and structural relationship of the productive sand bodies, though the overthrust shale does at some places form a roof over the productive sands.
Figures & Tables
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 30 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. Fields include: McKittrick, California; Fairport, Kansas; Urania, Louisiana; Artesia, New Mexico; Burbank, Oklahoma; Cabin Creek, West Virginia; and Luling, Texas.