California · Santa Clara County
Past Producer

Black Wonder Sec.28 Group.

Santa Clara County, California, United States
ManganeseSilica
⌖ Show on mapUSGS source ↗
Commodities
TertiaryManganese, Silica
Commodity typeM
Materials
Other materialsChert, Psilomelane, Quartz, Rhodochrosite
Economic & production
Development statusPast Producer
First production1941
Discovery year1940
Identification
Deposit ID10287050
MRDS IDM020203
Alternate namesBlack Eagle,May Be,Cottonwd.Clams, Triple Jump Claim
RegionNA
Data scoreC
Coordinates37.38162, -121.43132
References
TRASK-GEO DESCRIPTION CAL MN DEPS-CAL.DIV.OF MINES BUL.152 AJENKINS-MN IN CALIF-CAL DIV.OF MINES BUL.125,DEC 1943VOLIN-INVESTIG BLK WONDER MN DEPS-USBM.RPT.OF INVEST.5254 SE