California · Amador County
Prospect
Dufrene
Amador County, California, United States
Manganese
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USGS source ↗
Commodities
Tertiary
Manganese
Commodity type
M
Deposit
Deposit size
N
Materials
Ore minerals
Psilomelane, Pyrolusite, Rhodonite
Gangue
Magnetite
Economic & production
Development status
Prospect
Identification
Deposit ID
10097002
MRDS ID
M004877
Region
NA
Data score
C
Coordinates
38.34184, -120.86769
References
CALIF. JOUR. MINES & GEOL. V. 50, NO. 1, JAN. 1954, P.268, PL. 1DOM BULL. 152, P.28