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San Juan Mts, Colorado, USA

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Location is approximate, estimate based on other nearby localities.
Latitude & Longitude: 38° North , 105° West (est.)
Margin of Error:~380km
Locality type:Mountain Range

The San Juan Mountains are mostly co-extensive with the San Juan Volcanic field, a large area in southwestern Colorado, roughly triangular in shape, that includes many metal mining areas but also the zeolite producing outcrops west of Wolf Creek Pass. The San Juan Mountains are mostly developed on a huge pile of volcanic rocks including flows, welded tuffs, lahar, etc. that were erupted from many large caldera structures that are scattered throughout the region. Some of the calderas occur in clusters, overlapping or nested within larger structures. The San Juans generally extend from just west of Telluride, near the northwest corner, to the Bonanza area at the northeast corner and then south-southeast past Creede, Platoro and Wolf Creek Pass ending a short distance into New Mexico.

Mineral List

12 valid minerals.

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.


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Burbank, W.S. and Luedke, R.G. (1968) Geology and Ore Deposits of the Western San Juan Mountains, Colorado, in Ridge, J.D., (ed.) Ore Deposits of the United States, 1933-1967. The Graton-Sales Volume: American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., New York, Volume I, p. 714-733.

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