An occurrence of manganiferous ore on the hillside a short distance east of the Magma mill.
Mineralisation is an outcrop that occurs in a fault or shear zone in massive gray limestone, which strikes N50E and dips 45NE. The deposit is silicified material stained and impregnated with manganese and iron oxides. It is exposed for 250 feet and is from 1 to 4 feet wide.
References
Jones, E.L., Jr. & F.L. Ransome (1920), Deposits of manganese ore in Arizona, USGS Bull. 710-D: 162-163.
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