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St. Louis Tunnel (Rico Argentine), Rico District (Pioneer District), Dolores Co., Colorado, USA

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Latitude & Longitude (WGS84): 37° 42' 27'' North , 108° 1' 51'' West
Latitude & Longitude (decimal): 37.70750,-108.03083
Köppen climate type:Dfb : Warm-summer humid continental climate


REF:Deposit:: MCKNIGHT, E.T., 1974, GEOLOGY AND ORE DEPOSITS OF THE RICO DISTRICT, COLORADO: USGS PROF. PAPER 723, P. 79-81.
Deposit:: PRATT, W.P., AND OTHERS, 1969, GEOLOGIC MAP OF THE RICO QUADRANGLE, DOLORES AND MONTZUMA COUNTIES, COLORADO: USGS. MAP GQ-
Commodities (Major) - Gold, Zinc, Lead, Silver; (Trace) - Tellurium, Bismuth
Development Status: Past Producer
Deposit Model: 72: Polymetallic replacement
Host Rock Unit: Hermosa Formation
Structure: San Juan Uplift, Paradox Basin, Rico Dome, Blackhawk Fault, Princeton Fault
Host Rock: Limestone, Dolomite
Tectonic Structure: Central Cordillera (Southern Rocky Mtns)


Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


5 valid minerals.

Rock Types Recorded

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Select Rock List Type

Alphabetical List Tree Diagram

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 Macrostrat.org

Permian - Devonian
252.17 - 419.2 Ma



ID: 3190426
Paleozoic sedimentary rocks

Age: Paleozoic (252.17 - 419.2 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Pennsylvanian
298.9 - 323.2 Ma



ID: 2789470
Rico and Hermosa Fms

Age: Pennsylvanian (298.9 - 323.2 Ma)

Stratigraphic Name: Rico Formation; Hermosa Formation

Description: Arkosic sandstone, conglomerate, shale, and limestone. Includes at base in some areas siltstone and shale of Molas Fm or Larsen Quartzite

Lithology: Major:{arkose,conglomerate,shale}, Minor:{limestone,siltstone}

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 Macrostrat.org, used under Creative Commons Attribution 4.0 License



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