California · Napa County
Past Producer
Moore Creek Prospect
Napa County, California, United States
Manganese
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USGS source ↗
Commodities
Tertiary
Manganese
Commodity type
M
Economic & production
Development status
Past Producer
Discovery year
1918
Identification
Deposit ID
10285929
Alternate names
Manganese Ridge Prospect
Region
NA
Data score
D
Coordinates
38.53909, -122.40776
References
CALIF BULL 125 1943 P 145; CALIF BULL 76 1918 P 51PRODUCTION 150 TO 999 TONS; AVERAGE GRADE WAS 44 % MANGANESESILICA