An appraisal of Oregon's prospects as a possible future oil province requires consideration of two widely separated regions where thick sections of unmetamorphosed marine sediments occur: (1) the Coast Range Province of Tertiary rocks, and (2) the Central Oregon Province of Mesozoic and Paleozoic sediments. Between these two regions is the north-south-trending Cascade Range of late Tertiary volcanics. The remainder of the state, except for the metamorphic and plutonic masses of the Klamath Mountains in the southwest, and the Blue-Wallowa Mountains in the northeast, is covered by a thick section of volcanic rocks, with interbedded continental sediments, of Tertiary to Recent age, which conceal any pre-Tertiary marine sediments which may be present. Two parts of this vast concealed area, the Harney basin in southeastern Oregon, and the Vale-Ontario area in central easternmost Oregon, have attracted considerable attention from wildcatters and promoters, and are also discussed briefly for that reason.
Figures & Tables
Possible Future Petroleum Provinces of North America
Building upon a 1941 symposium and publication titled Possible Future Oil Provinces of the United States and Canada, this volume contains descriptions of nearly twice as many possible provinces, and discusses additional possibilities in some of the provinces considered in the 1941 publication. The inclusion and exclusion of provinces in this publication were done with the purpose of discussing possible, rather than probably or proved, provinces. The provinces of Alaska, western Canada, Pacific Coast states and Nevada, Rocky Mountain Region, Mid-Continent region, west Texas and eastern New Mexico, Fort Worth Basin, south Texas, Mexico, western Gulf Coast, continental shelf of Gulf of Mexico, southeastern United States, northeastern United States, Appalachian region, eastern Canada, and the eastern Interior Basin are presented here.