Specimen Mountain, Larimer County, Colorado, USAi
| Regional Level Types | |
|---|---|
| Specimen Mountain | Mountain |
| Larimer County | County |
| Colorado | State |
| USA | Country |
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Latitude & Longitude (WGS84):
40° 26' 40'' North , 105° 48' 30'' West
Latitude & Longitude (decimal):
Locality type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Grand Lake | 483 (2017) | 21.4km |
| Estes Park | 6,257 (2017) | 25.4km |
| Allenspark | 528 (2011) | 36.7km |
| Granby | 1,877 (2017) | 41.4km |
| Red Feather Lakes | 343 (2011) | 43.8km |
Specimen Mountain, elevation 12,494 ft (3,808 m), is a summit in the Front Range of northern Colorado. The mountain is north of Milner Pass in Rocky Mountain National Park.
Historical names are Geode Mountain, Mountain Smokes, and Specimen Mountain (since 1932).
Specimen Mountain is a red-tinted, extinct volcano that was last active around 27 million years ago. At that time, it was probably more conical in shape and much higher than it is now. Roadcuts near Poudre Lake contain some of the yellowish ash its eruptions spewed out.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β Allophane Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O Reference: Minerals of Colorado (1997) E.B. Eckel |
| β Calcite Formula: CaCO3 Reference: Minerals of Colorado (1997) E.B. Eckel |
| β Nontronite Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O Reference: Minerals of Colorado (1997) E.B. Eckel |
| β Opal Formula: SiO2 · nH2O Reference: Minerals of Colorado (1997) E.B. Eckel |
| β Quartz Formula: SiO2 Reference: Minerals of Colorado (1997) E.B. Eckels |
| β Quartz var. Agate Reference: Minerals of Colorado (1997) E.B. Eckel |
| β Quartz var. Chalcedony Formula: SiO2 Reference: Minerals of Colorado (1997) E.B. Eckels |
| β Quartz var. Jasper Reference: Minerals of Colorado (1997) E.B. Eckel |
| β Quartz var. Onyx Formula: SiO2 Reference: Minerals of Colorado (1997) E.B. Eckel |
| β Sanidine Formula: K(AlSi3O8) Reference: Minerals of Colorado (1997) E.B. Eckel |
| β Topaz Formula: Al2(SiO4)(F,OH)2 Reference: Minerals of Colorado (1997) E.B. Eckel |
| β Tridymite Formula: SiO2 Reference: Minerals of Colorado (1997) E.B. Eckel |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| β | Opal | 4.DA.10 | SiO2 Β· nH2O |
| β | Quartz | 4.DA.05 | SiO2 |
| β | var. Agate | 4.DA.05 | SiO2 |
| β | var. Chalcedony | 4.DA.05 | SiO2 |
| β | var. Jasper | 4.DA.05 | SiO2 |
| β | var. Onyx | 4.DA.05 | SiO2 |
| β | Tridymite | 4.DA.10 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| β | Allophane | 9.ED.20 | (Al2O3)(SiO2)1.3-2 Β· 2.5-3H2O |
| β | Nontronite | 9.EC.40 | Na0.3Fe2((Si,Al)4O10)(OH)2 Β· nH2O |
| β | Sanidine | 9.FA.30 | K(AlSi3O8) |
| β | Topaz | 9.AF.35 | Al2(SiO4)(F,OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| H | β Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O |
| H | β Opal | SiO2 · nH2O |
| H | β Topaz | Al2(SiO4)(F,OH)2 |
| C | Carbon | |
| C | β Calcite | CaCO3 |
| O | Oxygen | |
| O | β Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| O | β Quartz var. Chalcedony | SiO2 |
| O | β Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O |
| O | β Quartz var. Onyx | SiO2 |
| O | β Opal | SiO2 · nH2O |
| O | β Sanidine | K(AlSi3O8) |
| O | β Tridymite | SiO2 |
| O | β Topaz | Al2(SiO4)(F,OH)2 |
| O | β Calcite | CaCO3 |
| O | β Quartz | SiO2 |
| F | Fluorine | |
| F | β Topaz | Al2(SiO4)(F,OH)2 |
| Na | Sodium | |
| Na | β Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O |
| Al | Aluminium | |
| Al | β Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| Al | β Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O |
| Al | β Sanidine | K(AlSi3O8) |
| Al | β Topaz | Al2(SiO4)(F,OH)2 |
| Si | Silicon | |
| Si | β Allophane | (Al2O3)(SiO2)1.3-2 · 2.5-3H2O |
| Si | β Quartz var. Chalcedony | SiO2 |
| Si | β Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O |
| Si | β Quartz var. Onyx | SiO2 |
| Si | β Opal | SiO2 · nH2O |
| Si | β Sanidine | K(AlSi3O8) |
| Si | β Tridymite | SiO2 |
| Si | β Topaz | Al2(SiO4)(F,OH)2 |
| Si | β Quartz | SiO2 |
| K | Potassium | |
| K | β Sanidine | K(AlSi3O8) |
| Ca | Calcium | |
| Ca | β Calcite | CaCO3 |
| Fe | Iron | |
| Fe | β Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Wahlstrom, Ernest E. (1941) Hydrothermal deposits in the Specimen Mountain volcanics, Rocky Mountain National Park, Colorado. American Mineralogist: 26(9): 551-561.
Other Databases
| Wikipedia: | https://en.wikipedia.org/wiki/Specimen_Mountain |
|---|---|
| Wikidata ID: | Q14685105 |
External Links
http://www.minsocam.org/ammin/AM26/AM26_551.pdf [Wahlstrom, 1941]
Other Regions, Features and Areas containing this locality
North America
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Great Plains DomainDomain
USA
- Colorado
- Rocky Mountain National ParkNational Park
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