Tomkin lease, Dew Drop, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Tomkin lease | - not defined - |
| Dew Drop | - not defined - |
| Nevada County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 4' 17'' North , 121° 7' 28'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Lake of the Pines | 3,917 (2011) | 6.8km |
| Alta Sierra | 6,911 (2011) | 9.9km |
| Meadow Vista | 3,217 (2011) | 11.8km |
| Penn Valley | 1,621 (2011) | 15.0km |
| Colfax | 2,005 (2017) | 15.1km |
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 | 17km |
| Roseville Rock Rollers | Roseville, California | 38km |
| Sutter Buttes Gem & Mineral Society | Marysville, California | 41km |
| El Dorado County Mineral and Gem Society | Placerville, California | 47km |
| Gold Country Treasure Seekers | Placerville, California | 47km |
Mindat Locality ID:
84812
Long-form identifier:
mindat:1:2:84812:0
GUID (UUID V4):
64e0d376-d415-4bc4-8427-db51ecd0ef0f
A Cr occurrence located in the NE¼NE¼ sec. 18, T14N, R8E, MDM, 3.7 km (2.3 miles) WSW of Dew Drop and WSW of the Pleasant Ridge School, on state forest land. Owned/operated by W. J. Tomkin. MRDS database stated accuracy for this location is 500 meters.
Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include unspecified surface openings.
Land was under lease by Tomkin under a lease from an unidentified person in 1943. Tomkin produced 11.4 long tons of ore containing 37.38% Cr2O3 and 9.43% Fe with a Cr:Fe of 2.71.
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: | 10031691 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Foothills-Wallowa DomainDomain
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060570076
