Central Hill placer, Douglas Flat, Vallecito Mining District, Calaveras County, California, USAi
| Regional Level Types | |
|---|---|
| Central Hill placer | Placer |
| Douglas Flat | Flat |
| Vallecito Mining District | Mining District |
| Calaveras County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 7' 28'' North , 120° 27' 33'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Murphys | 2,213 (2015) | 1.5km |
| Vallecito | 442 (2011) | 4.0km |
| Forest Meadows | 1,249 (2015) | 6.7km |
| Angels Camp | 2,677 (2012) | 9.4km |
| Columbia | 2,297 (2017) | 11.0km |
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 | 9km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 42km |
Mindat Locality ID:
75027
Long-form identifier:
mindat:1:2:75027:8
GUID (UUID V4):
96ea4600-858e-4cd1-a7fa-a890a3ae2f18
A former hydraulic placer Au mine located in the SW¼ sec. 8, T3N, R14E, MDM, 1.2 km (0.7 mile) NNW of Douglas Flat (1 mile S of Murphys; upstream from the Uptograph Mine). Property consisted of 60 acres. Owned by William Thomas, Jr. Initially worked in the 1850's as a hydraulic mine. Active intermittently during the period 1888 to 1900. MRDS database stated accuracy for this location is 100 meters. Map GP-561 shows a group of mines in the SW¼NW¼.
Mineralization is a placer Au deposit located on the Centeral Hill paleochannel. The channel is deep and narrow, with sub-angular gravel capped by volcanic rock. The pay gravel is 30 to 100 feet wide and 5 feet deep. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).
Workings include surface operations.
Production information: 14,400 cubic yards of gravel were washed during the period 1895 to 1900. Au yield was $14,600 during 1896 (period values).
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Other Databases
| Link to USGS MRDS: | 10029417 |
|---|
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References
