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South Table Mountain, Golden, Golden District, Jefferson Co., Colorado, USA

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Latitude & Longitude (WGS84): 39° 45' 28'' North , 105° 11' 51'' West
Latitude & Longitude (decimal): 39.75805,-105.19770
GeoHash:G#: 9xj4njtr7
Locality type:Mountain
Köppen climate type:Dfb : Warm-summer humid continental climate

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Mineral List

23 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 Macrostrat.org

Holocene - Middle Pleistocene
0 - 0.781 Ma

ID: 2211848

Age: Pleistocene (0 - 0.781 Ma)

Description: Nonsorted deposits that consist of clay, silt, sand, and angular to subrounded clasts that range in size from granules to large boulders. Composition of deposits reflects that of upslope bedrock or sediment from which colluvium was derived. Includes material transported by frost creep, solifluction, and other periglacial processes, sheetwash, landslide, debris flow, hyperconcentrated flow, and rock fall. Extensive periglacial deposits are locally present near or above present treeline (about 3,500 m). Estimated thickness 3–50 m

Reference: Kellogg, K.S., Shroba, R.R., Bryant, Bruce, and Premo, W.R. Geologic Map of the Denver West 30' x 60' Quadrangle, North- Central Colorado. USGS Geologic Investigations Series 3000. [35]

Early Paleocene
61.6 - 66 Ma

ID: 2446175

Age: Paleocene (61.6 - 66 Ma)

Description: Dark-gray porphyritic lava flows capping North and South Table Mountains and forming dikes near Ralston Reservoir (also includes Flagstaff Mountain sill near Boulder, dated at 64 m.y. by Hoblitt and Larson, 1975). Includes Table Mountain Shoshonite (Scott, 1972) and monzonite and latite of Van Horn (1972). Three flows recognized in North Table Mountain and two flows recognized in South Table Mountain. Total thickness of flows about 73 m. Age of middle flow probably is 63-64 m.y. (Scott, 1972) and age of Ralston Reservoir intrusive is 62 m.y. (Hoblitt and Larson, 1975).

Reference: Trimble, D.E., M.N. Machette. Geologic Map of the Greater Denver Area, Front Range Urban Corridor, Colorado. U.S. Geological Survey Geologic Investigations Series I-856-H. [64]

61.6 - 66 Ma

ID: 2813573
Basaltic flows in Denver Fm near Golden

Age: Paleocene (61.6 - 66 Ma)

Stratigraphic Name: Denver Formation

Lithology: Major:{basalt}

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]

201.3 - 252.17 Ma

ID: 3191821
Mesozoic sedimentary rocks

Age: Triassic (201.3 - 252.17 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]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on mindat.org. 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 mindat.org 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)
Mineralogical Record (1988): 19: 153.
Tschernich, R. (1992): Zeolites of the World: 65, 114.
Eckel, Edwin B. (1997), Minerals of Colorado, updated & revised.
Rocks & Minerals (2004): 79: 4 (4 = issue No. or page ??).

Mineral and/or Locality  
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