Note: massive samples consisting of small crystalline grains of chromite have been erroneously attributed to this locality.
Refs.:
Matson, Robert Ernest, 1960 Petrography and petrology of Smoky Butte intrusives, Garfield County, Montana. Thesis University of Montana.
Wagner, Christiane and Velde, Danielle, 1986 Davanite, K2TiSi6O15, in the Smoky Butte (Montana) lamproites, Am.Min. 71(11-12): 1473-1475.
Velde, D. 1975 Armalcolite-Ti-phlogopite-diopside-analcite- bearing lamproites from Smoky Butte, Garfield County, Montana. Am.Min.: 60: 566-573.
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Map Reference: 48°18'N , 115°24'W
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