Alta Mine (Alta group; Alta - St. Louis), Ophir District (Iron Springs District), San Miguel Co., Colorado, USA
|Latitude & Longitude (WGS84):||37° 53' 9'' North , 107° 51' 6'' West|
|Latitude & Longitude (decimal):||37.88583,-107.85167|
|Köppen climate type:||Dfc : Subarctic climate|
Commodities (Major) - Gold; (Trace) - Lead, Zinc, Copper, Silver
Development Status: Past Producer
OWNER OR OPER: GARY BENNETT 1973
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
6 valid minerals.
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
|Rupelian - Priabonian|
28.1 - 37.8 Ma
|Pre-ash-flow andesitic lavas, breccias, tuffs, and conglomerates|
Age: Paleogene (28.1 - 37.8 Ma)
Description: Includes several named units
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. 
|Early Jurassic - Late Triassic|
174.1 - 237 Ma
|Mesozoic sedimentary rocks|
Age: Mesozoic (174.1 - 237 Ma)
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.