Mine detail: Columbus Mine

Previously called ''

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Location

Lat / long: 34.78443, -119.06287

Resource(N)

Primary: Boron-Borates
Tertiary: Gypsum-Anhydrite
Ore: Colemanite
Gangue: Gypsum
Discovery year: 1899

Production

Operation type: Unknown
Production size: Small
Development status: Past Producer
Production years: 1902-1907, 1912-1913
First production started: 1902

Geology

Host type:Shale,Limestone
Associated type:Basalt
Structure:Extensive Folding And Faulting

References

MRDSI003008
DEP10102219
Reference{Deposit:: GALE, H.S., 1912, BORATE DEPOSITS IN VENTURA COUNTY, CALIFORNIA: USGS BULL 540, P. 434-456.}{Deposit:: USBLM, 1959, MINERAL RECORD CARD.}{Deposit:: VER PLANCK, W.E., 1956, HISTORY OF BORAX PRODUCTION IN THE UNITED STATES: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 52, NO. 3, P. 273-191.}{Other Database:: CIMRI}
ReporterOrris, Greta J.