Rocky Ridge Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USAi
| Regional Level Types | |
|---|---|
| Rocky Ridge Mine | Mine |
| Fourmile | Unincorporated Community |
| Custer Mining District | Mining District |
| Custer County | County |
| South Dakota | State |
| USA | Country |
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Latitude & Longitude (WGS84):
43° 43' 29'' North , 103° 38' 30'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Custer | 1,952 (2017) | 5.8km |
| Pringle | 109 (2017) | 13.5km |
| Hill City | 995 (2017) | 23.7km |
| Keystone | 343 (2017) | 26.1km |
| Hot Springs | 3,532 (2017) | 35.2km |
Ref.: Rocks & Min.: 57:155; Roberts & Rapp (1965). A mine in pegmatite located 4 miles SW of Custer at Fourmile.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
5 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Beryl Formula: Be3Al2(Si6O18) References: |
| ⓘ Chrysoberyl Formula: BeAl2O4 References: |
| ⓘ 'Feldspar Group' References: |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 References: |
| ⓘ Purpurite Formula: Mn3+(PO4) References: Bob Massey collection, GRM 4168A.Identification: Visual Identification |
| ⓘ Quartz Formula: SiO2 References: |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.00.05 | SiO2 |
| ⓘ | Chrysoberyl | 4.BA.05 | BeAl2O4 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Purpurite | 8.AB.10 | Mn3+(PO4) |
| Group 9 - Silicates | |||
| ⓘ | Beryl | 9.CJ.05 | Be3Al2(Si6O18) |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Feldspar Group' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Be | Beryllium | |
| Be | ⓘ Beryl | Be3Al2(Si6O18) |
| Be | ⓘ Chrysoberyl | BeAl2O4 |
| O | Oxygen | |
| O | ⓘ Beryl | Be3Al2(Si6O18) |
| O | ⓘ Chrysoberyl | BeAl2O4 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Purpurite | Mn3+(PO4) |
| O | ⓘ Quartz | SiO2 |
| Al | Aluminium | |
| Al | ⓘ Beryl | Be3Al2(Si6O18) |
| Al | ⓘ Chrysoberyl | BeAl2O4 |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Beryl | Be3Al2(Si6O18) |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| P | Phosphorus | |
| P | ⓘ Purpurite | Mn3+(PO4) |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Mn | Manganese | |
| Mn | ⓘ Purpurite | Mn3+(PO4) |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Wyoming CratonCraton
- Wyoming DomainDomain
USA
- Black HillsMountain Range
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Rocky Ridge Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA