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Afton Canyon deposit (Kings; Masson; Erisman; Florite Canyon; Bighorn Number 9; Afton Fluorspar; Randall), Afton Canyon, Afton, Cady Mts, San Bernardino Co., California, USA

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Latitude & Longitude (WGS84): 34° 59' 53'' North , 116° 23' 5'' West
Latitude & Longitude (decimal): 34.9980555556, -116.384722222

A fluorspar prospect/deposit located in sec. 7, T10N, R6E, SBM, in the northern part of the Cady Mountains.

Mineral List

1 valid mineral.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Zanclean - Aquitanian
3.6 - 23.03 Ma
Tertiary volcanic flow rocks, unit 16 (Northern Mojave Desert)

Age: Neogene (3.6 - 23.03 Ma)

Stratigraphic Name: Alvord Peak Basalt; Artist Drive Formation; Barstow Formation (part); Funeral Fanglomerate (part); Gem Hill Formation (part); Greenwater Volcanics; Red Buttes Quartz Basalt; Ricardo Formation (part); Saddleback Basalt; Tropico Group

Description: Tertiary volcanic flow rocks; minor pyroclastic deposits.

Lithology: Major:{rhyolite,basalt}, Minor:{dacite}, Incidental:{trachyte, andesite, basaltic andesite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page 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.


Tucker, W. Burling & Reid J. Sampson (1943b), Mineral resources of San Bernardino County: California Division Mines Report 39: 513-514.

Crosby, James W. III & S.R. Hoffman (1951), Fluorspar in California: California Journal of Mines and Geology: 47: 633-636.

Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology: 49(1-2): tabulated list: No. 465: 159, 424.

Southern Pacific Co. (1964b), Minerals for Industry, Vol. III - Southern California: 173.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 190.

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