Mine detail: Union Gulch

Previously called 'BolinasChetcoPearson and Bros.'

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Location

Lat / long:

37.97156, -122.73245

Resource(M)

Primary:	Copper
Secondary:	Silver, Gold
Ore:	Chalcopyrite, Pyrite
Gangue:	Quartz
Discovery year:	1863

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Production years:	1863 , 1918

Geology

Host type:

Sandstone

References

MRDS	M009226
DEP	10030803
Reference	{Deposit:: AUBURY, L.E., 1908 ; COPPER RESOURCES OF CALIFORNIA BULL. 50 ; CALIF. MIN. BUR., P. 168 - 169}{Deposit:: ERIC, J.H., 1948 : COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 264}{Deposit:: PLANCK, WM. E. VER., 1955 : MINES AND MINERAL RESOURCES OF MARIN COUNTY, CA.; CALIF. JOUR. MINES AND GEOLOGY, VOL. 51 , NO. 3 ; DIV. OF MINES, P. 279 .}{Production:: ERIC, J.H., 1948 .}
Reporter	Gere, W., Fraticelli, L. A. (Albers, J.)