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Fidelity deposit, Red Mountain, Black Wonder Mining District, Santa Clara Co., California, USAi
Regional Level Types
Fidelity depositDeposit
Red MountainMountain
Black Wonder Mining DistrictMining District
Santa Clara Co.County

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Latitude & Longitude (WGS84):
37° 25' 24'' North , 121° 29' 27'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
Diablo Grande826 (2017)18.9km
East Foothills8,269 (2011)29.2km
Westley603 (2011)29.3km
Alum Rock15,536 (2018)30.4km
Grayson952 (2011)31.6km

A former magnesite occurrence/mine located in the center SW¼ sec. 12, T6S, R4E, MDM, on the S border of sec. 12, T6S, R4E, 2.3 km (1.4 miles; 7,600 feet) WNW of Red Mountain, E of Sweetwater Creek and S of Blackbird Valley. MRDS database stated accuracy for this location is 500 meters.

Local rocks include ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains).

Workings include surface openings.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

1 valid mineral.

Detailed Mineral List:

Formula: MgCO3
Reference: Bondenlos, A.J. (1950) Magnesite deposits of central Ceará, Brazil. Washington, Government Printing Office, 153p.; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 206.

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates

List of minerals arranged by Dana 8th Edition classification


List of minerals for each chemical element

C MagnesiteMgCO3
O MagnesiteMgCO3
Mg MagnesiteMgCO3


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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Bondenlos, A.J. (1950) Magnesite deposits of central Ceará, Brazil. Washington, Government Printing Office, 153p.
California Journal of Mines and Geology (1950): 46(2) (April): 229, 274, Pls. 38, 39.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 206.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10111044 & 10116531.
U.S. Bureau of Mines Minerals Availability System/Mineral Industry Location System (MAS/MILS): file #0060850170.

USGS MRDS Record:10111044

Other Regions, Features and Areas containg this locality

North America
North America PlateTectonic Plate

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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