‡Ref.: Ransome (1923) USGS Folio 217.
Williams, S.A. & J.W. Anthony (1970), Hemihedrite, a new mineral from AZ, Am.Min.: 55: 1088-1102.
Schmidt (1971) Ph.D. thesis, University of Arizona.
Cornwall & Krieger (1975) USGS Map GQ-1188.
Clark (1993), "Hey's Mineral Index."
Anthony, J.W., et al (1995), Mineralogy of Arizona (1995), 3rd.ed.: 158, 247, 300, 390, 413, 421, 426.
Arizona Bureau of Mines file data.
MRDS database Dep. ID #10037113; MRDS ID #M030467.
A former Pb-Ag-Cu-Au-Mo-Cr-Zn surface mine.
Mineralization is a sheared fault zone between Escabrosa Limestone and quartzite (granitic conglomerate of the San Manuel formation). Alteration is from sphalerite and galena.
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Map Reference: 33°0'25"N , 110°57'27"W
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