‡Ref.: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 114-115, 187; Clark, M.D. (1979), Geology of the older Precambrian rocks of the Grand Canyon, Part III. Petrology of mafic schists and amphibolites, Precambrian Research: 8: 277-302.
An occurrence at mile 229 of the Grand Canyon.
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Map Reference: 36°6'8"N , 112°13'7"W
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Mineral List:2 entries listed. 2 valid minerals.
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