| Abstract: | Red radiolarian cherts from three localities within the Franciscan subduction complex of northern California contain three components of remanent magnetization which are best isolated by progressive thermal demagnetization. The available paleomagnetic, biostratigraphic, and geochemical data indicate deposition of these cherts along the paleoequator (0??-2??N or S paleolatitude) between Pliensbachian and Oxfordian time as the oceanic plate moved eastward, relative to North America, beneath the equatorial zone of high biologic productivity. The chert sequences were subsequently accreted to the American continental margin. Plate reconstruction models for the Farallon plate corrobotate low-paleolatitude trajectories from ridge crest to subduction zone, and they imply subsequent northward translation of the Franciscan Complex by strike-slip faulting related to relative motions between the Farallon, Kula, Pacific, and North American plates. -from Authors |
| Genre: | Article |
| ProdID: | 70017777 |
| Citation Author: | Hagstrum, J. T.; Murchey, B. L. |
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| Citation End Page: | 778 |
| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geological Society of America Bulletin |
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| Citation Number Of Pages: | 13 |
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| Citation Search Results Text: | Deposition of Franciscan Complex cherts along the paleoequator and accretion to the American margin at tropical paleolatitudes; 1993; Article; Journal; Geological Society of America Bulletin; Hagstrum, J. T.; Murchey, B. L. |
| Citation Start Page: | 766 |
| Citation Volume: | 105 |
| Citation Year: | 1993 |
| Type: | citation/reference |
| Text: | Deposition of Franciscan Complex cherts along the paleoequator and accretion to the American margin at tropical paleolatitudes; 1993; Article; Journal; Geological Society of America Bulletin; Hagstrum, J. T.; Murchey, B. L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1993 00:00 -0600 |
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