Central Pacific Railroad Mine (Central Pacific R. R.; Central Pac. R.R.), Penobscot Farm, Greenwood District, Northwest Segment Mother Lode, El Dorado County, California, USAi
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Latitude & Longitude (WGS84):
38° 52' 30'' North , 120° 56' 13'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Auburn Lake Trails | 3,426 (2011) | 4.6km |
| Cool | 4,100 (2017) | 6.9km |
| Georgetown | 2,367 (2011) | 9.2km |
| Coloma | 529 (2011) | 9.3km |
| Auburn | 13,953 (2017) | 12.3km |
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 |
|---|---|---|
| El Dorado County Mineral and Gem Society | Placerville, California | 20km |
| Gold Country Treasure Seekers | Placerville, California | 20km |
| Roseville Rock Rollers | Roseville, California | 33km |
| Nevada County Gem & Mineral Society | Grass Valley, California | 40km |
| Fossils for Fun Society, Inc. | North Highlands, California | 43km |
Mindat Locality ID:
77415
Long-form identifier:
mindat:1:2:77415:3
GUID (UUID V4):
f3a0304b-2b4e-427a-827e-dcdab773cc47
A former Cr occurrence/mine located in the E½ sec. 23, T12N, R9E, MDM, 2.7 km (1.7 miles) SSE of Penobscot Farm, along a south-flowing tributary of Greenwood Creek, W of Greenwood Creek (about 2 miles SW of Greenwood), on private land. Operated by D. O. Niegel. Operated during the period 1916 to 1918. MRDS database stated accuracy for this location is 1,000 meters.
Local rocks include Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).
Workings include surface and underground openings comprised of open cuts and a shaft.
About 250 tons of ore were mined (1916-1918). The ore was alleged to have 35 to 41% chromite, depending on the care with which it was sorted. It was believed that the chances for discovering other ore bodies were favorable.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS MRDS: | 10029825 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
USA
- California
- Mother Lode BeltBelt
- Sierra NevadaMountain Range
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060170185
