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Missouri River placers, Helena Mining District (Spring Hill Mining District), Lewis and Clark County, Montana, USAi
| Regional Level Types | |
|---|---|
| Missouri River placers | Group of Placers |
| Helena Mining District (Spring Hill Mining District) | Mining District |
| Lewis and Clark County | County |
| Montana | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° North , 112° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~11km
Type:
Group of Placers
Köppen climate type:
Placers on the Missouri River, 20 miles NE of Helena.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Corundum Formula: Al2O3 |
| ⓘ Corundum var. Sapphire Formula: Al2O3 |
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Corundum | 4.CB.05 | Al2O3 |
| ⓘ | var. Sapphire | 4.CB.05 | Al2O3 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Corundum | Al2O3 |
| O | ⓘ Corundum var. Sapphire | Al2O3 |
| Al | Aluminium | |
| Al | ⓘ Corundum | Al2O3 |
| Al | ⓘ Corundum var. Sapphire | Al2O3 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Medicine Hat DomainDomain
- Northern Rocky MountainsWide Rift
- West Canadian-Alberta basinBasin
USA
- Montana
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