Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 196, 284.
A mining camp located in the SE part of the Helvetia-Rosemont District, about 4 miles SE of Helvetia. It contains 20 or more mining properties.
These properties are mostly on the upper east slope of the range and some of them joining the Helvetia properties at the crest.
They are chiefly in the Paleozoic limestone, which is in places highly garnetiferous and epidotized and which in the middle slope of the range passes beneath Mesozoic sediments of wide extent. The limestone is in general much faulted and crushed, and the fault planes and structure dip steeply to the south. Here and there it shows also horizontal displacement. It is loally intruded by the Mesozoic granular rocks, some of which, as the diorite on the Murphy claim, are heavily impregnated with pyrite, cupriferous pyrite, and chalcopyrite.
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