Missouri River gravel bar, Helena area, Helena Mining District (Spring Hill Mining District), Lewis and Clark County, Montana, USAi
Regional Level Types | |
---|---|
Missouri River gravel bar | - not defined - |
Helena area | Area |
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° 40' 57'' North , 111° 48' 21'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Helena Valley Northeast | 2,995 (2011) | 11.3km |
Helena Valley Southeast | 8,227 (2011) | 11.6km |
East Helena | 2,057 (2017) | 13.3km |
Montana City | 2,715 (2011) | 18.8km |
Helena Valley West Central | 7,883 (2011) | 19.5km |
Mindat Locality ID:
29859
Long-form identifier:
mindat:1:2:29859:2
GUID (UUID V4):
8949ed52-e3dc-404b-8f83-1d4e59fa455c
Located about 15 miles NE of Helena.
Berg (2015) says this is the largest and most productive of the Montana Sapphire localities.
Five people were actively mining alluvial sapphire in 2015.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
ⓘ Corundum Formula: Al2O3 |
ⓘ Corundum var. Sapphire Formula: Al2O3 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
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 |
Other Regions, Features and Areas containing this locality
North America
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Belt BasinBasin
- Great Falls DomainDomain
USA
- Montana
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