Cowell Silver Sand Company, Clayton, Contra Costa Co., California, USAi
Regional Level Types | |
---|---|
Cowell Silver Sand Company | - not defined - |
Clayton | - not defined - |
Contra Costa Co. | County |
California | State |
USA | Country |
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Key
Latitude & Longitude (WGS84):
37° 56' 42'' North , 121° 59' 30'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
North Gate | 679 (2017) | 4.4km |
Clayton | 11,867 (2017) | 4.9km |
Concord | 128,667 (2017) | 5.0km |
Waldon | 5,364 (2011) | 5.9km |
Pleasant Hill | 34,810 (2017) | 6.0km |
A silica occurrence/pit located in the SE¼NW¼SE¼ sec. 8, T1N, R1W, MDM, 5.0 km (3.1 miles) W of Clayton (3 miles SE of Concord). Operated by Henry Cowell Lime and Cement Company. MRDS database stated accuracy for this location is 100 meters. Several hundred tons of sand per month were being removed. In 1958, the pit was being worked by the Silver Sand Company and Charles Laws. Material produced was about 45 cubic yards per day, and was being used as fill sand for asbestos shingles. Most of the sand was subsequently used as fill material under the concrete foundation slabs of homes.
NOTE: USGS MRDS database file #10187440, that is lacking an literature references, states that this locality is a Ag deposit. This is quite apparently an egregious error based on the name of one of the operators (Silver Sand Company).
Mineralization is a sand deposit. Local rocks include Eocene marine rocks.
Workings include surface openings comprised of a pit.
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References
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Year (asc) Year (desc) Author (A-Z) Author (Z-A)Davis, Fenelon Francis & J.W. Vernon (1951), Mines and mineral resources of Contra Costa County, California: California Journal of Mines and Geology (Report 47): 47(4): 581.
California Journal of Mines and Geology (1958) (Report 54): 54(4): 552-553, 580 & 554-555, 583.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10109199 & 10187440.
U.S. Bureau of Mines Minerals Availability System/Mineral Industry Location System (MAS/MILS): file #0060130042.
Other Regions, Features and Areas containg this locality
North America
- Coast MountainsMountain Range
North America PlateTectonic Plate
USA
- California
- Diablo RangeMountain Range
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