Winship properties , Cedar Mountain, Cedar Mountain Mining District, Alameda Co., California, USAi
|Regional Level Types|
|Winship properties ||- not defined -|
|Cedar Mountain Mining District||Mining District|
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Latitude & Longitude (WGS84):
37° 33' 11'' North , 121° 35' 48'' West
Latitude & Longitude (decimal):
Köppen climate type:
A magnesite occurrence located in the center S½ sec. 25, in the SE¼ sec. 34 and in the S½ sec. 35, T4S, R3E, MDM, 1.1 km (0.7 mile; 3,500 feet) SE of Cedar Mountain (coordinates of record), along the E slope of Cedar Mountain Ridge, on private land. Owned by the K. D. Winship estate. MRDS database stated accuracy for this location is 1,000 meters.
The property in sec. 25 was worked by lessees in 1917, who prospected and performed some development work. Some of the larger patches in sec. 34 were worked at the Magnesia Mine. Transportation would be difficult to these areas since they lie in a rather deep canyon, a branch of the Arroyo del Valle. BIM stated that there were no minerals in S½ sec. 34.
Local rocks include rocks of the Franciscan melange.
Workings include some prospecting and development work.
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
1 valid mineral.
Detailed Mineral List:
| ⓘ Magnesite|
Reference: Bradley, W.W. (1925), Magnesite in California: California Mining Bureau. Bulletin 79: 42-43. Davis, Fenelon Francis (1950), Mines and mineral resources of Alameda County, California: California Journal of Mines and Geology: 46(2): 343, Pl. 58; U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
List of minerals arranged by Strunz 10th Edition classification
|Group 5 - Nitrates and Carbonates|
List of minerals arranged by Dana 8th Edition classification
|Group 14 - ANHYDROUS NORMAL CARBONATES|
List of minerals for each chemical element
Sort byYear (asc) Year (desc) Author (A-Z) Author (Z-A)
Harder, Edmund Cecil (1910), Some chromite deposits in western and central California: USGS Bulletin 430: 173.
Bradley, W.W. (1925), Magnesite in California: California Mining Bureau. Bulletin 79: 42-43.
Huey, Arthur Sidney (1948), Geology of the Tesla quadrangle, California California Division Mines Bulletin 140, 75 pp.: Pl. 1 (geology).
Davis, Fenelon Francis (1950), Mines and mineral resources of Alameda County, California: California Journal of Mines and Geology: 46(2): 343, Pl. 58.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10027984 & 10283960.
U.S. Bureau of Mines Minerals Availability System/Mineral Industry Location System (MAS/MILS): file #0060010041.
Other Regions, Features and Areas containg this locality
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