Robinson Property, Placerville District, Lower San Miguel District, San Miguel Co., Colorado, USA
|Latitude & Longitude (WGS84):||38° 1' 23'' North , 108° 2' 30'' West|
|Latitude & Longitude (decimal):||38.02310,-108.04170|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
White Spar, New Discovery Lode, and Barbara Jo claims. Listed as sec. 35, T. 43 N , R. 11 W in Wilmarth, but actually T44N.
The rocks in this area are nearly horizontal sandstones, shales, limestones, and conglomerates of the Cutler formation of Permian age and the Dolores formation of Triassic and Jurassic (?) age. These rocks have been faulted extensively and intruded by a Tertiary (?) andesite porphyry dike.
13 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
|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. 
201.3 - 237 Ma
Age: Late Triassic (201.3 - 237 Ma)
Stratigraphic Name: Dolores Formation
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.