Gypsum from Mission complex, San Xavier, Pima Mining District (Olive Mining District; Mineral Hill Mining District; Twin Buttes Mining District), Sierrita Mountains, Pima County, Arizona, USA
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| Stone, R.W. (1920), Gypsum deposits of the United States, USGS Bull. 697: 52. |
Betts, John (n.d.) John Betts website listing. | |
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 185, 242. |
Mission pit, Mission complex, San Xavier, Pima Mining District, Sierrita Mountains, Pima County, Arizona, USA