Mine detail: Thomas Mine

Previously called 'North Thomas Mine,Round Mountain'

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Location

Lat / long: 39.31047, -123.17529

Resource(M)

Tertiary: Manganese, Silica
Other material: Chert, Psilomelane, Pyrolusite
Discovery year: 1912

Production

Operation type: Surface-Underground
Development status: Past Producer
First production started: 1914

Geology

References

MRDSM045326
MAS60450052
DEP10285652
Reference{Deposit:: CDMG BULLETINS:152,1950, #125,1943, #76,1918}{Deposit:: USBM R.I.5579,1960}{Deposit:: USGS FILE,1917-18}
ReporterDeino, Al