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Map Satellite A kilometer or so downstream from the Friant Dam and north of the San Joaquin River is an excellent example of varved lake sediments. Most of the sediments are almost glass-like volcanic material, pumicite.
The sediments appear to have been deposited by catastrophic Pleistocene floods.
Integrity: There is quarrying in the area.
Use: Private
September 1977
Inventory of California Natural Areas
Revision © 2008 Steven Louis Hartman
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