Roach Hill Quartz Mine (Roach Hill Mine), Roach Hill, Iowa Hill Mining District, Placer County, California, USAi
| Regional Level Types | |
|---|---|
| Roach Hill Quartz Mine (Roach Hill Mine) | Mine |
| Roach Hill | Hill |
| Iowa Hill Mining District | Mining District |
| Placer County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 7' 0'' North , 120° 51' 22'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Colfax | 2,005 (2017) | 8.6km |
| Dutch Flat | 160 (2011) | 10.1km |
| Alta | 610 (2011) | 10.7km |
| Foresthill | 1,483 (2011) | 11.2km |
| Alta Sierra | 6,911 (2011) | 17.3km |
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 | 21km |
| El Dorado County Mineral and Gem Society | Placerville, California | 43km |
| Gold Country Treasure Seekers | Placerville, California | 43km |
A former placer Au occurrence/hydraulic mine located in the NE¼SW¼ sec. 28, T15N, R10E, MDM, about 1.8 km WSW of Roach Hill, on the E wall of the canyon of the North Fork American River, about 2.3 km NNE of Iowa Hill. MRDS database stated accuracy for this location is 100/500 meters (2 MRDS files).
Mineralization is a vein deposit hosted in serpentinite. The ore body strikes NNE and dips 50ESE at a thickness of 0.61 meter. The vein is 2 feet thick. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range) and/or Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).
Workings include underground openings comprised of an inclined shaft with at least 2 levels.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
Other Databases
| Link to USGS MRDS: | 10034902 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060610422 & 0060610414
Hobson, John B. (1890), Nevada, Placer, Siskiyou Counties: California In. Bureau Report 10: 364-398.
