. Bulletin of the Geological Society of America. Geology. THE STRUCTURAL CLASSIFICATION 561 majority of oil fields of the world, and as a matter of fact is common in the Appalachian, Ohio, Indiana, Illinois, Mid-Continent, Wyoming, northern Louisiana, and some of the California fields in this country, and supposedly in the Eiissian, Austrian, Burma, and Borneo fields in the eastern hemisphere. Class II is divided into five subclasses, in order to distinguish between various structural relations in which oil ig found associated with anticlines and Figure 1.—Examine of siihacUnal Str
. Bulletin of the Geological Society of America. Geology. THE STRUCTURAL CLASSIFICATION 561 majority of oil fields of the world, and as a matter of fact is common in the Appalachian, Ohio, Indiana, Illinois, Mid-Continent, Wyoming, northern Louisiana, and some of the California fields in this country, and supposedly in the Eiissian, Austrian, Burma, and Borneo fields in the eastern hemisphere. Class II is divided into five subclasses, in order to distinguish between various structural relations in which oil ig found associated with anticlines and Figure 1.—Examine of siihacUnal Structure (Class I) in Stephens County, OJclahoma Scale : 1 inch =r mile ; contour interval, 20 feet The best known examples of the distinctions in Classes II and III come from Ohio, West Virginia, and Pennsylvania, where some of the largest oil and gas fields A generalized cross-section of these fields from west to east is shown in figure 2. In this section the pools of Sub- class 11(c) are situated on the crest of theCincinnati geanticline in north- western Ohio and northeastern Indiana, the oil and gas being contained. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological Society of America. [New York : The Society]
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