Mine detail: Keystone

Previously called 'Big Avalanche Group'

<< Back to the map

<< Back to browsing

Location: Sierra County, California, United States, North America
Lat / long: 39.54961, -120.54881
dep_id: 10034786
mrds_id: M021697
Commodity type: metallic
Major mineral: Gold
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Gold
gangue: Quartz
work_type: Surface/Underground
Reporter: Hayden, F. (Albers, J.)
hrock_type: Slate
References:
  • Deposit:: AVERILL, C. V., 1942 , MINES AND MINERAL RESOURCES OF SIERRA CO.: CDM CALIF. JOUR. MINES AND GEOL., VOL. 38 , NO. 1 , P. 58 .
  • Deposit:: LOGAN, C. A., 1929 , SIERRA CO.: CDMM 25TH REPORT STATE MINERALOGIST, APRIL, P. 179 .
  • Deposit:: MCCULLOCH, W. C., ETAL, 1964 , MINERALS FOR INDUSTRY, N CALIF.: SO PACIFIC CO., VOL. 2 , P. 54 .
  • Deposit:: MACBOYLE, E., 1920 , MINES AND MINERAL RESOURCES SIERRA CO.: CSMB 16TH REPORT STATE MINERALOGIST, DEC. 1918 , P 98 .
  • Production:: MACBOYLE, 1920
© 2010-2018 Lee C. Baker unless noted. All rights reserved.