| Abstract: | The Upper Triassic Chinle Formation of the Colorado Plateau contains voluminous volcanic detritus evidently derived from a source to the south. Volcanic rocks exposed in southern Arizona and northern Sonora have been assumed to represent this source terrane, but U-Pb isotopic geochronology and regional stratigraphic correlations indicate that these volcanic rocks are distinctly younger than the Chinle, and thus not a source for the volcanic detritus in the Chinle. Igneous rocks of known or possible Late Triassic age in Nevada, California, or northeastern Mexico are possible sources, but a clearly defined source terrane for the volcanic detritus in the Chinle has not been identified. Tectonic removal of the source terrane by rifting or strike-slip offset, though not proven, is a possibility. -Authors |
| Genre: | Article |
| ProdID: | 70014529 |
| Citation Author: | Stewart, J. H.; Anderson, T. H.; Hazel, G. B.; Silver, L. T.; Wright, J. E. |
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| Citation End Page: | 570 |
| Citation Issue: | 7 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geology |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Late Triassic paleogeography of the southern Cordillera: the problem of a source for voluminous volcanic detritus in the Chinle Formation of the Colorado Plateau region ( USA).; 1986; Article; Journal; Geology; Stewart, J. H.; Anderson, T. H.; Hazel, G. B.; Silver, L. T.; Wright, J. E. |
| Citation Start Page: | 567 |
| Citation Volume: | 14 |
| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Late Triassic paleogeography of the southern Cordillera: the problem of a source for voluminous volcanic detritus in the Chinle Formation of the Colorado Plateau region ( USA).; 1986; Article; Journal; Geology; Stewart, J. H.; Anderson, T. H.; Hazel, G. B.; Silver, L. T.; Wright, J. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1986 00:00 -0600 |
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