| Abstract: | The Oligocene and Miocene Valley Springs Formation represents a large fluvial depositional system that extended westward from sediment-filled palaeovalleys in the high Sierra Nevada to a piedmont alluvial plain under the present Central Valley. The Valley Springs Formation consists largely of tuffaceous mudrocks, tuffaceous sandstone, polymict conglomerate and rhyodacitic tuff. The tuffaceous mudrock lithofacies probably represents a complex of ephemeral lake and marsh environments on a low gradient alluvial plain. The inferred abundance of shallow lakes, ponds and marshes implies a climate that was wetter than the semi-arid climate of the region today. -from Author |
| Genre: | Article |
| ProdID: | 70017768 |
| Citation Author: | Bartow, J. A. |
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| Citation End Page: | 232 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Sedimentology |
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| Citation Number Of Pages: | 18 |
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| Citation Search Results Text: | Tuffaceous ephemeral lake deposits on an alluvial plain, Middle Tertiary of central California; 1994; Article; Journal; Sedimentology; Bartow, J. A. |
| Citation Start Page: | 215 |
| Citation Volume: | 41 |
| Citation Year: | 1994 |
| Type: | citation/reference |
| Text: | Tuffaceous ephemeral lake deposits on an alluvial plain, Middle Tertiary of central California; 1994; Article; Journal; Sedimentology; Bartow, J. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
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