The San Geronimo is a gold mine located in Marin county, California at an elevation of 361 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Elevation: 361 Feet (110 Meters)
Primary Mineral: Gold
Lat, Long: 38.01889, -122.65639
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San Geronimo MRDS details
Site NamePrimary: San Geronimo
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
PhysiographyGeneral Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges
Mineral Deposit Model
|Comment: SHAFT SUNK IN SILICA-CARBONATE ROCKS IN 1870'S AND IT WAS REPORTED THAT ORE AVERAGED $30 TO $40 PER TON IN GOLD AND CONTAINED IN ADDITION SILVER, IRON, MANGANESE, ANTIMONY, AND TRACES OF NICKEL. THERE IS NO RECORD OF PRODUCTION.|
|Comment: A 200-FT. SHAFT.|
|Comment: SHAFT IS 200 YDS NORTH OF SIR FRANCIS DRAKE HIGHWAY AND 0.3 MI. WEST OF THE SAN GERONIMO -NICASIO ROAD. IT HAS BEEN FILLED IN AS A SAFETY PRECAUTION.|
Reference Category: Deposit
Reference: CALIF. JOUR. MINES & GEOL. V. 51, NO. 3, JULY 1955, P. 268-9, 280, PL.