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Bass Mine (Bass property; Asbestos Camp), Grand Canyon, Coconino Co., Arizona, USA

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Latitude & Longitude (WGS84): 36° 15' North , 112° 22' West
Latitude & Longitude (decimal): 36.25, -112.366668701
Other regions containing this locality:Grand Canyon National Park, Arizona, USA

A former asbestos occurrence/mine located in the vicinity of Bass Ferry and 25 miles NW of Grand Canyon station. The deposit is 450 feet from the bottom of the canyon, which is 4,500 feet deep at this location.

Mineralization is in veins along bedding planes in Precambrian Bass Limestone that has been altered adjacent to diabase sills. The thickest veins occur in limestone, 3 to 15 feet below a diabase sill.

The Grand Canyon exposes an excellent section of the Carboniferous, Cambrian, Algonkian, and Archean rocks. The Algonkian is markedly unconformable with the overlying Cambrian as well as the underlying Archean, and forms a wedge-shaped mass with its edge along the canyon near its bottom and thickening rapidly to the north. The asbestos occurs in the basal portion of the Algonkian. Fifteen feet of whitish limestone overlie beds of siliceous conglomerate and fine shaly beds. This limestone contains layers and nodules of serpentine with more or less asbestos. Above the asbestos limestone comes a heavy layer of compact diabase about 200 feet thick, and above the diabase is a bed of limestone and shaly rocks similar to those immediately below the diabase. A little asbestos is seen above the diabase.

Mineral List

1 valid mineral.

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.


Diller, J.S. (1907), Mineral Resources of the United States, USGS.

Noble, L.F. (1914), Shinumo quadrangle, USGS Bulletin 549: 57-60.

Allen, M.A. & G.M. Butler (1921), Asbestos, University of Arizona Bulletin 113: 24-25.

Selfridge, G.C., Jr. (1936), An X-ray and optical investigation of the serpentine minerals, American Mineralist: 21: 463-503.

Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 106.

Breed, W.J. & Roat, Ed (1974), Geology of the Grand Canyon: 172.

Peirce, H.W. (1990), Arizona Geological Survey, Industrial Minerals card file.

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 367.

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