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G. L. Fenster occurrence, Black Mountain, Black Wonder Mining District, Stanislaus Co., California, USAi
Regional Level Types
G. L. Fenster occurrenceOccurrence
Black MountainMountain
Black Wonder Mining DistrictMining District
Stanislaus Co.County

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Latitude & Longitude (WGS84):
37° 23' 54'' North , 121° 24' 50'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
Diablo Grande826 (2017)11.9km
Westley603 (2011)25.3km
Patterson21,498 (2017)26.4km
Grayson952 (2011)27.7km
Crows Landing355 (2011)30.2km

A magnesite occurrence located in sec. 22, T6S,R5E, MDM, 7.4 km (4.6 miles) N of Black Mountain, N of Peach Tree Creek. MRDS database stated accuracy for this location is 1,000 meters.

Local rocks include rocks of the Franciscan melange.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

1 valid mineral.

Detailed Mineral List:

Formula: MgCO3
Reference: USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10287386.

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


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Laizure, Clyde McK (1925), San Francisco field division: California Journal of Mines and Geology, California Mining Bureau (Report 21): 21(3): 208.
Charles, Abbott (1947), Mines and minerals of Stanislaus County: California Division Mines Report 43: 43(2) (April).
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10287386.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060990129.

USGS MRDS Record:10287386

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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