Pluto claim (Pluto patent), Westinghouse Mine (Westinghouse property; Davis property), Nash Mines group (Duquesne-Washington group), Montosa Canyon, Tyndall District, Santa Rita Mts, Santa Cruz Co., Arizona, USA
Latitude: 31°40'9"N
Longitude: 110°55'19"W
Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 186-187.
University of Arizona Bull. 41 (1916-17), Mineralogy of Useful Minerals in Arizona: 40.
U.S. Bureau of Land Management Mining District Sheet #666.
A Au-Cu patented claim with underground workings located about ¾ mile north of the Montosa Mine.
The deposit here seems to be in shale and greenish silicated limestone, and is probably associated in origin with intrusive andesite or diorite dikes which occur nearby on the west.
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