Mine detail: Fort Baker

Previously called 'Porter Ranch'

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Location

Lat / long:

40.59428, -123.7578

Resource(M)

Primary:	Manganese
Tertiary:	Chromium
Ore:	Psilomelane

Production

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

Geology

Host type:

Shale,Sandstone,Chert

References

MRDS	M008744
DEP	10030553
Reference	{Deposit:: CDM BULL. 134, PT. 1, PL. 19}{Deposit:: D.O.M. BULL. 152, 1950, PP. 65-67}{Deposit:: CALIF. JOUR. MINES & GEOLOGY, V.37, NO. 4, OCT. 1941, PP. 518-19; ADD. REF.: USBM RI 5579, P. 7; PSFC FIG. 7, CALIF. DIV. MINES BULL. 179, FIG. 13; MR-23}
Reporter	Gere, W., Von Dohlen, E.; Albers, J.