California · Mendocino County
Occurrence
Hopper Prospect
Mendocino County, California, United States
Manganese
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USGS source ↗
Commodities
Tertiary
Manganese
Commodity type
M
Economic & production
Development status
Occurrence
Discovery year
1917
Identification
Deposit ID
10115543
MRDS ID
M009998
Region
NA
Data score
D
Coordinates
39.32407, -123.08469
References
CALIF JOUR MINES AND GEOL V49 NO4 OCT 1953 P387