Marshall placer, San Andreas, San Andreas Mining District, Calaveras County, California, USAi
| Regional Level Types | |
|---|---|
| Marshall placer | Placer |
| San Andreas | Census-designated Place |
| San Andreas Mining District | Mining District |
| Calaveras County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 11' 5'' North , 120° 40' 25'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| San Andreas | 2,783 (2011) | 1.4km |
| Mountain Ranch | 1,628 (2011) | 12.6km |
| Mokelumne Hill | 646 (2011) | 13.2km |
| Valley Springs | 3,553 (2011) | 13.6km |
| Rancho Calaveras | 4,489 (2018) | 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 |
|---|---|---|
| Calaveras Gem & Mineral Society | Angels Camp, California | 17km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 26km |
A placer drift Au occurrence/mine located in sec. 20, T4N, R12E, MDM, 1.4 km (4,500 feet/0.9 mile) SSE of San Andreas. MRDS database stated accuracy for this location is 500 meters.
Mineralization is a placer Au deposit located on the Cental Hill channel. Slate bedrock is capped by 6 feet of pay gravel, 45 to 50 feet of rhyolite and gravel. At the S end of the property, a narrow channel containing barren, unwashed cobbles cuts 36 feet below the main channel. Local rocks include undivided pre-Cenozoic metavolcanic rocks, unit 2 (undivided) and/or Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings comprised of 5 shafts 90 to 127 feet deep, 800 feet of drifts, plus 2 long crosscut tunnels.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au Description: Placer material in the Central Hill paleochannel. |
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: | 10028870 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- California
- Mother Lode BeltBelt
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