Mine detail: Shell View No.3

Previously called 'Helmke Manganese Group'

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Location

Lat / long:

40.11815, -123.52921

Resource(M)

Tertiary:	Manganese
Discovery year:	1942

Production

Operation type:	Surface
Development status:	Past Producer

Geology

References

MRDS	M020355
MAS	61050065
DEP	10214670
Reporter	Western Field Operations Center (WFOC)