California · Calaveras County
Occurrence
Fortner Ranch Prospect
Calaveras County, California, United States
Manganese
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USGS source ↗
Commodities
Tertiary
Manganese
Commodity type
M
Deposit
Deposit size
N
Materials
Ore minerals
Psilomelane, Pyrolusite, Spessartite
Economic & production
Development status
Occurrence
Identification
Deposit ID
10028845
MRDS ID
M006074
Region
NA
Data score
C
Coordinates
38.22574, -120.66407
References
CALIF. B. 152, P. 42-43; B. 125, P. 106; B.76, P.31EC MINERAL MAP NO.5, 1943USBM R.I. 5579, P.22REPT. 21 , P. 163 ; COUNTY REPT. NO. 2 , P. 212 AND PL. D; USGS MR-23