Mine detail: Gravelly Valley

Previously called ''

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Location

Lat / long: 39.44487, -122.97303

Resource(M)

Primary: Manganese

Production

Operation type: Unknown
Production size: Small
Development status: Producer

Geology

References

MRDSM009042
DEP10030712
Reference{Deposit:: CALIF. JOUR., VOL. 43, NO. 1, JAN. 1947, PP. 21-22}{Deposit:: CALIF. BULL.152, P. 91}{Deposit:: MIN. INF. SERVICE V. 11, NO. 11, P. 9; ADD. REF.: USBM RI 5579, P. 7-8}
ReporterGere, W., Killman, K.; Albers, J.