California · Calaveras County
Past Producer

Keystone Union

Calaveras County, California, United States
CopperGoldLeadSilver
⌖ Show on mapUSGS source ↗
Commodities
TertiaryCopper, Gold, Lead, Silver
Commodity typeM
Deposit
WorkingsUnderground
Economic & production
Development statusPast Producer
Identification
Deposit ID10235156
MRDS IDM006028
Alternate namesCalaveras Copper
RegionNA
Data scoreC
Coordinates37.98431, -120.64771
References
REF 1 CALIF.DIV.OF MINES, COPPER IN CALIF, BULL.144, CALIF.NAT.RES.,1948. INCLUDES PLATES OF MINE MAPS, REFERENC3 & 4,P 427;EC MINERAL MAP NO 7,1957;COUNTY REPT NO 2,P 24-2REF 2 LYMAN MOORE DATA FROM 1970 EVALUATIONED,SEPT 1,1944,P 26;CALIF B 176,P 170,171 & 174REF 3 CALIF.DIV.OF MINES AND GEOLOGY, MINES AND MINERAL RESOF CALIVERAS COUNTY,CALIF., COUNTY REPORT NO.2, 196