Abstract
Publisher Summary The thick accumulations of sedimentary rocks, mostly of Mesozoic and Cenozoic age, underlie major portions of the continental margin, that is, shelf and slope and adjacent deeper-water areas that border California, Oregon, Washington, and Alaska. Some of these sedimentary basins have been partly explored; however, most of them are undrilled or frontier basins. Many of these basins are formed in response to a variety of tectonic circumstances related to the interactions, both direct and indirect, of major lithospheric plates. Regional geologic considerations and the implications of publicly available geologic data allow for speculations about the likelihood that offshore Pacific–Arctic basins contain significant hydrocarbon deposits. Onshore coastal basins in southern California contain large amounts of oil and gas in thick turbidite beds of chiefly Miocene and younger age, while smaller amount occur in other reservoir rocks. The continental shelf and slope that borders Oregon and Washington is underlain by more than 5 km of Eocene and younger sedimentary and volcanic rocks.
Published Version
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