Mine detail: Big Horn No. 1

Previously called 'Helmke Manganese Group'

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Location

Lat / long: 40.12705, -123.50221

Resource(M)

Tertiary: Manganese
Discovery year: 1942

Production

Operation type: Unknown
Development status: Prospect

Geology

References

MRDSM020300
MAS61050012
DEP10117771
Reference{Deposit:: CA DEPT. OF NATURAL RESOURCES BULLETIN 125, 1950,}{Deposit:: PGS. 302-341.}{Deposit:: CA DEPT. OF NATURAL RESOURCES BULLETIN OF WAR MINERALS}{Deposit:: PROD. BULLETIN 6, 1942.}
ReporterWestern Field Operations Center (WFOC)