California · San Luis Obispo County
Past Producer
Johe Ranch Mine
San Luis Obispo County, California, United States
Manganese
Silica
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USGS source ↗
Commodities
Tertiary
Manganese, Silica
Commodity type
M
Materials
Other materials
Chert, Jasper, Psilomelane
Economic & production
Development status
Past Producer
First production
1917
Discovery year
1916
Identification
Deposit ID
10213583
MRDS ID
W025013
Alternate names
Johe Manganese Deposit, Irish Hills Deposit, Johe Ranch Deposit
Region
NA
Data score
C
Coordinates
35.26577, -120.76427
References
CALIF. STATE MINING BUR. BULLETIN 76, 1918, P. 70.CALIF. DIV. MINES BULLETIN 152, 1950, P. 232-233.U.S. BUREAU OF MINES RI 5579, 1960, P. 44-45.