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Investigation of the Black Wonder Manganese Deposits, Santa Clara and Stanislaus Counties, California

Description: Report issued by the Bureau of Mines over manganese deposits of Santa Clara and Stanislaus Counties. As stated in the introduction, "the geology is outlined, ore deposits are described and work performed by the Bureau of Mines is covered in detail and supplemented by assay maps and figures" (p. 1). This report includes tables, maps, and illustrations.
Date: September 1956
Creator: Volin, M. E.; Matson, E. J. & Trengove, R. R.
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