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Tuffaceous ephemeral lake deposits on an alluvial plain, Middle Tertiary of central California

Sedimentology

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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

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Tuffaceous ephemeral lake deposits on an alluvial plain, Middle Tertiary of central California
Series title:
Sedimentology
Volume
41
Issue:
2
Year Published:
1994
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Sedimentology
First page:
215
Last page:
232
Number of Pages:
18