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Investigation of West Belt Copper-Zinc Mines, El Dorado, Amador, Calaveras, and Mariposa Counties, California
Report issued by the U.S. Bureau of Mines on the West Belt copper-zinc mines. The properties and characteristics of the mineral composition are presented. The report includes tables and maps.
Date:
February 1951
Creator:
Wiebelt, Frank J.; Sanborn, W. C.; Trengove, R. R. & Ricker, Spangler
System:
The UNT Digital Library
Quien Sabe Antimony Mine San Benito County, California
Report issued by the Bureau of Mines over metallurgical studies of the Quien Sabe antimony mine. History, geology, and physical features of the mine are presented. This report includes tables, maps, and illustrations.
Date:
February 1956
Creator:
Wiebelt, Frank Joseph
System:
The UNT Digital Library