Mine detail: Helmke Manganese Group

Previously called 'Schoolhouse No.1 Claim'

<< Back to the map

Location

Lat / long: 40.13065, -123.50001

Resource(M)

Tertiary: Manganese
Discovery year: 1942

Production

Operation type: Surface
Development status: Prospect

Geology

References

MRDSM020352
MAS61050062
DEP10263033
ReferenceCA BULL 152 1950 P 334
ReporterWestern Field Operations Center (WFOC)