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Bessie G Mine, La Plata District (California District), La Plata Co., Colorado, USA

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Latitude & Longitude (WGS84): 37° 25' 56'' North , 108° 0' 32'' West
Latitude & Longitude (decimal): 37.43210,-108.00889
Köppen climate type:Dsb : Warm, dry-summer continental climate

Unpatented claims: Road Runner Nos. 1-8; Bessie G. Extension; Morning Star; MS 2381; North Star; MS 2380; Rebecca; MS 2382; Margo No. 2; 4; 5; Hardway Smith Nos. 1-12; Bessie G.; MS 2055; Lady Douglass; MS 2378; Beth Nos. 1-12; Patented Claims: Martha; MS 1721;

Mineral List

31 valid minerals.

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

Late Triassic
201.3 - 237 Ma

ID: 2843236
Dolores Fm

Age: Late Triassic (201.3 - 237 Ma)

Stratigraphic Name: Dolores Formation

Description: Red siltstone, shale, sandstone, and limestone-pellet conglomerate

Lithology: Major:{siltstone,shale,sandstone}, Minor:{conglomerate}

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.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Saunders, J. A. (1986). Petrology, mineralogy, and geochemistry of representative gold telluride ores from Colorado (Doctoral dissertation, Colorado School of Mines).
Rocks & Minerals (1989): 64: 500.
Vajdak, Josef (2008), Mineral News: 24(3): 15.
Galbraith, F. W. (1941). Ore minerals of the La Plata Mountains, Colorado, compared with other telluride districts. Economic Geology, 36(3), 324-334.
Vogel, C. (2014, October). Insight into the Origin of Gold at the Bessie G Mine, La Plata Mining District, Southwestern Colorado. In 2014 GSA Annual Meeting in Vancouver, British Columbia.

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