California · Lake County
Past Producer
Gravelly Valley
Lake County, California, United States
Silica
Manganese
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USGS source ↗
Commodities
Tertiary
Silica, Manganese
Commodity type
M
Materials
Other materials
Chert, Psilomelane, Pyrolusite
Economic & production
Development status
Past Producer
First production
1942
Discovery year
1918
Identification
Deposit ID
10139161
MRDS ID
M009042
Alternate names
Toy Young
Region
NA
Data score
D
Coordinates
39.44627, -122.97829
References
USBM R.I.5579,1960CDMG,BULL.152,1950CDMG,BULL.125,1943USGS FILE,1918