Marin Company No. 25 Mine, Fort Baker, Marin Co., California, USA
A Mn occurrence/mine located 0.8 km (2,600 feet) N of Fort Baker allegedly located in Pike County Gulch (opposite side of the county), about 1 mile S of the Union Gulch Mine Co. May be the same as Copper Gulch Mine. May be in sec. 18.
ReferencesVer Planck, Wm. E., Jr. (1955), Mines, mineral resources and mineral industries of Marin County, California: California Journal of Mines and Geology, California Division of Mines (Report 51): 51(3): 279.
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Locality Updated: Gatch Quarry (Gatch Crushed Stone Company Inc.), Harford Co., Maryland, USAFrom Bruce Wayne Osborne, 6th Dec 2013 03:45:19