Star prospect (Mildred Lloyd prospect), Cedar Ridge, American Camp Mining District, East Belt, Tuolumne County, California, USAi
| Regional Level Types | |
|---|---|
| Star prospect (Mildred Lloyd prospect) | Prospect |
| Cedar Ridge | Hamlet |
| American Camp Mining District | Mining District |
| East Belt | - not defined - |
| Tuolumne County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 6' 5'' North , 120° 17' 22'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Cedar Ridge | 1,132 (2011) | 4.1km |
| Twain Harte | 2,226 (2011) | 8.5km |
| Mi-Wuk Village | 941 (2011) | 10.0km |
| Sierra Village | 456 (2011) | 10.7km |
| Phoenix Lake | 4,269 (2017) | 10.7km |
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 | 22km |
A Au-Cu-Pb-Ag occurrence/prospect located in sec. 23 & 24, T3N, R15E, MDM, 4.1 km (2.5 miles) NNW of Cedar Ridge, along Rose Creek (2 miles NE of Columbia, on the ridge S of Rose Creek), on National Forest land. The claim is 1935 acres (probably 19.35 acres). MRDS database stated accuracy for this location is 100 meters.
NOTE: Goodwin (1957) refers to this as the Star. MRDS file #10263110 provides coordinates and lists this locality in sec. 1, T2N, R15E, MDM. This would seem to be in error since all other descriptive data places it in secs. 23 & 24, T3N, R15E.
Mineralization is a quartz vein deposit. The ore body strikes NE and dips 45SE. The vein is hosted in slate a few hundred feet from a large granite mass. The quartz is heavily sulfurated, giving a dark gray color. The gold is coarse. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings comprised of a main shaft 170 feet deep, and an aggregate of 1,400 feet of workings (adits, shafts, winzes & raises).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Galena Formula: PbS |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10077947 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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