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US Highway 285 roadcut, Foothill Mining District, Jefferson County, Colorado, USAi
| Regional Level Types | |
|---|---|
| US Highway 285 roadcut | Road Cutting |
| Foothill Mining District | Mining District |
| Jefferson County | County |
| Colorado | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° North , 105° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~53km
Type:
Köppen climate type:
SE of town in Turkey Creek Canyon.
Select Mineral List Type
StandardDetailedGalleryStrunzChemical ElementsDetailed Mineral List:
| ⓘAlunogen Formula:Al2(SO4)3 · 17H2O |
| ⓘCopiapite ? Formula:Fe2+Fe3+4(SO4)6(OH)2 · 20H2O |
| ⓘHalotrichite Formula:FeAl2(SO4)4 · 22H2O |
| ⓘIlsemannite Formula:Mo3O8 · nH2O |
| ⓘMagnesiocopiapite ? Formula:MgFe3+4(SO4)6(OH)2 · 20H2O References: |
| ⓘSzomolnokite Formula:FeSO4 · H2O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Ilsemannite | 4.FJ.15 | Mo3O8 · nH2O |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Szomolnokite | 7.CB.05 | FeSO4 · H2O |
| ⓘ | Alunogen | 7.CB.45 | Al2(SO4)3 · 17H2O |
| ⓘ | Halotrichite | 7.CB.85 | FeAl2(SO4)4 · 22H2O |
| ⓘ | Copiapite ? | 7.DB.35 | Fe2+Fe3+4(SO4)6(OH)2 · 20H2O |
| ⓘ | Magnesiocopiapite ? | 7.DB.35 | MgFe3+4(SO4)6(OH)2 · 20H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘAlunogen | Al2(SO4)3 · 17H2O |
| H | ⓘCopiapite | Fe2+Fe43+(SO4)6(OH)2 · 20H2O |
| H | ⓘHalotrichite | FeAl2(SO4)4 · 22H2O |
| H | ⓘIlsemannite | Mo3O8 · nH2O |
| H | ⓘMagnesiocopiapite | MgFe43+(SO4)6(OH)2 · 20H2O |
| H | ⓘSzomolnokite | FeSO4 · H2O |
| O | Oxygen | |
| O | ⓘAlunogen | Al2(SO4)3 · 17H2O |
| O | ⓘCopiapite | Fe2+Fe43+(SO4)6(OH)2 · 20H2O |
| O | ⓘHalotrichite | FeAl2(SO4)4 · 22H2O |
| O | ⓘIlsemannite | Mo3O8 · nH2O |
| O | ⓘMagnesiocopiapite | MgFe43+(SO4)6(OH)2 · 20H2O |
| O | ⓘSzomolnokite | FeSO4 · H2O |
| Mg | Magnesium | |
| Mg | ⓘMagnesiocopiapite | MgFe43+(SO4)6(OH)2 · 20H2O |
| Al | Aluminium | |
| Al | ⓘAlunogen | Al2(SO4)3 · 17H2O |
| Al | ⓘHalotrichite | FeAl2(SO4)4 · 22H2O |
| S | Sulfur | |
| S | ⓘAlunogen | Al2(SO4)3 · 17H2O |
| S | ⓘCopiapite | Fe2+Fe43+(SO4)6(OH)2 · 20H2O |
| S | ⓘHalotrichite | FeAl2(SO4)4 · 22H2O |
| S | ⓘMagnesiocopiapite | MgFe43+(SO4)6(OH)2 · 20H2O |
| S | ⓘSzomolnokite | FeSO4 · H2O |
| Fe | Iron | |
| Fe | ⓘCopiapite | Fe2+Fe43+(SO4)6(OH)2 · 20H2O |
| Fe | ⓘHalotrichite | FeAl2(SO4)4 · 22H2O |
| Fe | ⓘMagnesiocopiapite | MgFe43+(SO4)6(OH)2 · 20H2O |
| Fe | ⓘSzomolnokite | FeSO4 · H2O |
| Mo | Molybdenum | |
| Mo | ⓘIlsemannite | Mo3O8 · nH2O |
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Great Plains DomainDomain
- Southern Rocky MountainsOrogenic Belt
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Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 byJolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.doi:10.2138/am-2024-9486.
Privacy Policy -Terms & Conditions -Contact Us / DMCA issues -Report a bug/vulnerabilityCurrent server date and time: November 27, 2025 23:49:23 Page updated: August 27, 2025 05:39:09
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 byJolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.doi:10.2138/am-2024-9486.
Privacy Policy -Terms & Conditions -Contact Us / DMCA issues -Report a bug/vulnerabilityCurrent server date and time: November 27, 2025 23:49:23 Page updated: August 27, 2025 05:39:09