| Abstract: | Contemporary in situ tectonic stress indicators along the San Andreas fault system in central California show northeast-directed horizontal compression that is nearly perpendicular to the strike of the fault. Such compression explains recent uplift of the Coast Ranges and the numerous active reverse faults and folds that trend nearly parallel to the San Andreas and that are otherwise unexplainable in terms of strike-slip deformation. Fault-normal crustal compression in central California is proposed to result from the extremely low shear strength of the San Andreas and the slightly convergent relative motion between the Pacific and North American plates. Preliminary in situ stress data from the Cajon Pass scientific drill hole (located 3.6 kilometers northeast of the San Andreas in southern California near San Bernardino, California) are also consistent with a weak fault, as they show no right-lateral shear stress at ???2-kilometer depth on planes parallel to the San Andreas fault. |
| Genre: | Article |
| ProdID: | 70014742 |
| Citation Author: | Zoback, M. D.; Zoback, M. L.; Van Mount, S.; Suppe, J.; Eaton, J. P.; Healy, J. H.; Oppenheimer, D.; Reasenberg, P.; Jones, L.; Raleigh, C. B.; Wong, I. G.; Scotti, O.; Wentworth, C. |
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| Citation End Page: | 1111 |
| Citation Issue: | 4830 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | New evidence on the state of stress of the san andreas fault system; 1987; Article; Journal; Science; Zoback, M. D.; Zoback, M. L.; Van Mount, S.; Suppe, J.; Eaton, J. P.; Healy, J. H.; Oppenheimer, D.; Reasenberg, P.; Jones, L.; Raleigh, C. B.; Wong, I. G.; Scotti, O.; Wentworth, C. |
| Citation Start Page: | 1105 |
| Citation Volume: | 238 |
| Citation Year: | 1987 |
| Type: | citation/reference |
| Text: | New evidence on the state of stress of the san andreas fault system; 1987; Article; Journal; Science; Zoback, M. D.; Zoback, M. L.; Van Mount, S.; Suppe, J.; Eaton, J. P.; Healy, J. H.; Oppenheimer, D.; Reasenberg, P.; Jones, L.; Raleigh, C. B.; Wong, I. G.; Scotti, O.; Wentworth, C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1987 00:00 -0600 |
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