California · Trinity County
Prospect
Helmke Manganese Group
Trinity County, California, United States
Manganese
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USGS source ↗
Commodities
Tertiary
Manganese
Commodity type
M
Economic & production
Development status
Prospect
Discovery year
1942
Identification
Deposit ID
10263033
MRDS ID
M020352
Alternate names
Schoolhouse No.1 Claim
Region
NA
Data score
D
Coordinates
40.13065, -123.50001
References
CA BULL 152 1950 P 334