California · San Joaquin County
Past Producer
Mahoney 1 Mine
San Joaquin County, California, United States
Manganese
Silica
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USGS source ↗
Commodities
Tertiary
Manganese, Silica
Commodity type
M
Materials
Other materials
Chert, Psilomelane
Economic & production
Development status
Past Producer
First production
1915
Discovery year
1914
Identification
Deposit ID
10116352
MRDS ID
M020146
Alternate names
Johnson Mine, Doak Mine
Region
NA
Data score
C
Coordinates
37.64321, -121.50042
References
C.D.M.G. BULL. 152, PP. 226-7 PLATE 10,1950U.S. BUREAU OF MINES RI 4580, 1949; NW. OF THE LADD MINE.