Mine detail: Cummings

Previously called 'Lone Tree,Section 13'

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Location

Lat / long: 37.58631, -121.48382

Resource(M)

Tertiary: Manganese, Silica
Other material: Chert, Psilomelane, Pyrolusite, Rhodochrosite

Production

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

Geology

References

MRDSM020143
MAS60770002
DEP10262735
Reference{Deposit:: BRADLEY,1918,MN AND CR IN CALIF, CMB BULL. 76}{Deposit:: TRASK,ET.AL.,1950,GEOL.RECON. OF MN.IN CALIF,CDM #152}{Deposit:: TRENGROVE,1960,GEOL.DESC. OF MN IN CALIF.,USBM R.I.5579}
ReporterDeino, Al