Alpha Diggings Placer Mine (Alpha Diggings), Alpha, Washington Mining District (Omega Mining District), Nevada County, California, USAi
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Latitude & Longitude (WGS84):
39° 20' 10'' North , 120° 46' 60'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Washington | 185 (2011) | 2.9km |
| Alta | 610 (2011) | 14.6km |
| Dutch Flat | 160 (2011) | 15.2km |
| Pike | 134 (2011) | 21.7km |
| Nevada City | 3,152 (2017) | 21.8km |
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 | 27km |
A former placer Au occurrence/mine located in the E½SW¼ & W½SE¼ sec. 18, T17N, R11E, MDM, 0.6 km (0.4 mile) N of Alpha (site), on National Forest land. MRDS database stated accuracy for this location is 500 meters.
The placer is comprised of Neocene gravels with about 75 acres of gravel preserved (Lindgren). The pebbles consist chiefly of quartz, quartzite and hard conglomerate. The banks are 90 feet high, including 20 feet of clay at the top. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au Description: Placer material. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10031958 |
|---|
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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