Wall property (Wall property patented; Well property), Cape Horn, Colfax Mining District (Illinois Mining District), Placer County, California, USAi
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Latitude & Longitude (WGS84):
39° 8' 7'' North , 120° 56' 13'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Colfax | 2,005 (2017) | 4.1km |
Alta Sierra | 6,911 (2011) | 10.1km |
Dutch Flat | 160 (2011) | 11.6km |
Alta | 610 (2011) | 13.4km |
Grass Valley | 12,944 (2017) | 14.2km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
Club | Location | Distance |
---|---|---|
Nevada County Gem & Mineral Society | Grass Valley, California | 14km |
El Dorado County Mineral and Gem Society | Placerville, California | 47km |
Gold Country Treasure Seekers | Placerville, California | 47km |
Mindat Locality ID:
85964
Long-form identifier:
mindat:1:2:85964:9
GUID (UUID V4):
5f646574-7937-4238-8f07-8d7183c2d465
A former talc mine located in the NE¼ sec. 23, T15N, R9E, MDM, 1.3 km (0.8 mile) WNW of Cape Horn and 4.0 km (2.5 miles) NNE of Colfax (adjacent to the You Bet Road). Owned by the Wall Brothers/Wall Brothers heirs. Operated in the late 1890's. MRDS database stated accuracy for this location is 1,000 meters.
The deposit is a large upright lens of talc and block soapstone on a ridge above the roadf. The lens is 10 to 20 feet wide and the dip is vertical. The material is soft and without grit. Most of the material exposed in the pit is iron-stained. A workable vein of high-quality, white-grinding talcwas reported to occur in an old tunnel. Local rocks include Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).
Workings include surface openings comprised of open pits. The largest pit is 200 feet long by 50 feet wide by 30 feet deep showing soapstone and talc the entire distance. It was proven at least 200 feet farther on the strike.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
ⓘ 'Soapstone' |
ⓘ Talc Formula: Mg3Si4O10(OH)2 Description: Mined commercially. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 9 - Silicates | |||
---|---|---|---|
ⓘ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
Unclassified | |||
ⓘ | 'Soapstone' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Talc | Mg3Si4O10(OH)2 |
O | Oxygen | |
O | ⓘ Talc | Mg3Si4O10(OH)2 |
Mg | Magnesium | |
Mg | ⓘ Talc | Mg3Si4O10(OH)2 |
Si | Silicon | |
Si | ⓘ Talc | Mg3Si4O10(OH)2 |
Other Databases
Link to USGS MRDS: | 10032096 |
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Other Regions, Features and Areas containing this locality
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060610460