California · Alameda County
Past Producer
Black Jack
Alameda County, California, United States
Manganese
Silica
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USGS source ↗
Commodities
Tertiary
Manganese, Silica
Commodity type
M
Materials
Other materials
Chert, Psilomelane, Pyrolusite
Economic & production
Development status
Past Producer
First production
1885
Discovery year
1884
Identification
Deposit ID
10211101
MRDS ID
M004665
Region
NA
Data score
D
Coordinates
37.58931, -121.61243
References
CDMG,BULL.76,1918CDMG,BULL.152,1950CDMG,BULL.125,1943CDMG,BULL.140