Mine detail: Challenge

Previously called 'Farm Hill No. 2Redwood City'

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Location

Lat / long:

37.44574, -122.25048

Resource(M)

Primary:	Mercury
Ore:	Cinnabar, Mercury, Metacinnabar
Orebody form:	IRREGULAR

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1955

Geology

Host rock:	Franciscan Complex
Host type:	Serpentinite
Alteration processes:	Silica Carbonate Alteration Of Serpentine

References

MRDS	M055738
DEP	10040863
Reference	{Deposit:: HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252}{Deposit:: DAVIS, F.F., 1955, MINES AND MINERAL RESOURCES OF SAN MATEO COUNTY, CALIF.: CJMG, V. 51, P. 413-414}{Production:: USBM DATA}
Reporter	Peterson, Jocelyn A.