| Abstract: | The NW margin of the California continental border land consists of 2 NW-trending pre-Neogene lithologic belts blanketed by Miocene and younger strata. These represent facies corresponding to the subduction complex and forearc-basin deposits of a late Mesozoic and Paleogene continental-margin arc-trench system. The outer belt, which forms the acoustic basement is characterized by: 1) moderately high compressional velocities; 2) discordant and discontinuous seismic reflectors; and 3) nonfossiliferous and diverse rock types. Landward, the inner Great Valley sequence belt is characterized by: 1) intermediate compressional velocities; 2) concordant and relatively continuous reflectors, and 3) a thick turbidite sequence. Well-developed wrench-fault structures in overlying Miocene strata record a transition from Paleogene subduction to Neogene transform faulting. The timing of volcanism and uplift, and of the younger wrenching event, closely matches the plate-tectonic model of Atwater and Molnar.-from Author |
| Genre: | Article |
| ProdID: | 70011856 |
| Citation Author: | Crouch, J. K. |
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| Citation End Page: | 218 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | American Association of Petroleum Geologists Bulletin |
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| Citation Number Of Pages: | 28 |
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| Citation Search Results Text: | Northwest margin of California continental borderland: marine geology and tectonic evolution.; 1981; Article; Journal; American Association of Petroleum Geologists Bulletin; Crouch, J. K. |
| Citation Start Page: | 191 |
| Citation Volume: | 65 |
| Citation Year: | 1981 |
| Type: | citation/reference |
| Text: | Northwest margin of California continental borderland: marine geology and tectonic evolution.; 1981; Article; Journal; American Association of Petroleum Geologists Bulletin; Crouch, J. K. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1981 00:00 -0600 |
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