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Big Blue group (North Extension Sumner; Jeff Davis; Bull Run; Beauregard; Urbana; Frank; Content; Big Blue-Sumner; Glue Gouge), Wofford Heights, Cove District, Kern Co., California, USA

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A former group of Au-Cu-Pb-Ag mines located in sec. 28 and the NW¼ sec. 32, E½ sec. 21, T25S, R33E, MDM, 3.1 km (1.9 miles) NE of Wofford Heights and 3.0 km (1.9 miles) SW of Kernville. Started in 1860. MRDS database stated accuracy for this location is 1,000 meters.

Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Workings include unspecified underground openings.

Mineral List

Mineral list contains entries from the region specified including sub-localities

10 entries listed. 9 valid minerals.

Localities in this Region


The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Prout, John W., Jr. (1940), Geology of the Big Blue group of mines, Kernville, California: California Division Mines Report 36: 379-421.

Rocks & Minerals (1943): 18: 234.

Troxel, Bennie Wyatt & P.K. Morton (1962), Mines and mineral resources of Kern County, California: California Division Mines & Geology County Report No. 1, 370 pp.: 97-99, 118, 212, map No. 122, p. 136.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 107, 254, 269, 311.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 69, 74, 79, 84, 89, 103, 126, 128.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10110705 & 10188335.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060290122.

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