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⇱ Tomkin lease, Dew Drop, Nevada County, California, USA

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Tomkin lease, Dew Drop, Nevada County, California, USAi
Regional Level Types
Tomkin lease- not defined -
Dew Drop- not defined -
Nevada CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
39° 4' 17'' North , 121° 7' 28'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Lake of the Pines3,917 (2011)6.8km
Alta Sierra6,911 (2011)9.9km
Meadow Vista3,217 (2011)11.8km
Penn Valley1,621 (2011)15.0km
Colfax2,005 (2017)15.1km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Nevada County Gem & Mineral SocietyGrass Valley, California17km
Roseville Rock RollersRoseville, California38km
Sutter Buttes Gem & Mineral SocietyMarysville, California41km
El Dorado County Mineral and Gem SocietyPlacerville, California47km
Gold Country Treasure SeekersPlacerville, California47km
Mindat Locality ID:
84812
Long-form identifier:
mindat:1:2:84812:0
GUID (UUID V4):
0


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 Elements

Mineral List


1 valid mineral.

Detailed Mineral List:

ⓘ Chromite
Formula: Fe2+Cr3+2O4

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4

List of minerals for each chemical element

OOxygen
Oⓘ ChromiteFe2+Cr23+O4
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
FeIron
Feⓘ ChromiteFe2+Cr23+O4

Other Databases

Link to USGS MRDS:10031691

Other Regions, Features and Areas containing this locality


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References

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