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Book Chapter

Region 2

January 01, 1971


For the purposes of this report, Region 2— comprising the Pacific Coastal States of California, Oregon, and Washington, and the adjacent continental shelf and slope—has been divided into 18 areas encompassing not only the sedimentary basins but also the mountains and less promising areas of basement and volcanic rocks. Figure 1 shows the location of these areas and the names of the authors.

Total area of the sedimentary basins in Region 2 is calculated as 126,133 sq mi (326,684 sq km), and the estimated volume of sedimentary rocks is 251,508 cu mi (1,048,034 cu km). The authors have concluded that these basins contain 114.3 billion bbl of undiscovered petroleum in place, including gas equivalents (Table 1). It is predicted that most of this total will be located under the unexplored waters of the continental shelf and borderland; however, the known productive basins still have an attractive exploration future. New ideas, some “far out,” have been advanced that make several of the unproductive and untested provinces worthy of further consideration.

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AAPG Memoir

Future Petroleum Provinces of the United States—Their Geology and Potential, Volumes 1 & 2

Ira H. Cram
Ira H. Cram
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American Association of Petroleum Geologists
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Publication date:
January 01, 1971




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