 | | Journal (article/letter/editorial) | | Google seemed to average twelve states (North Dakota, South Dakota, Nebraska, Kansas, Minnesota, Iowa, Missouri...Mineral Show® committee annexed a chunk of the South to this core and chose to feature sixteen “Midwest”...per state. Four states— Michigan, Wisconsin, South Dakota, and Arkansas—at the periphery of the area tally...species being described from just one mine, the Tip Top, in South Dakota. (Note: There are no type locality...occurrences in only four Midwestern states: North Dakota, Nebraska, Oklahoma, and Kentucky; these might |  | | Journal (article/letter/editorial) | | geochemistry, and petrology. It is most fitting that černýite, Cu2CdSnS4, a mineral of the stannite group, has...1969. Černýite also occurs at the Hugo pegmatite, peripheral to the Harney Peak Granite, Keystone, South...South Dakota. Data on its composition and structure derived from both localities led to approval by the |  | | Journal (article/letter/editorial) | | geochemistry, and petrology. It is most fitting that černýite, Cu2CdSnS4, a mineral of the stannite group, has...1969. Černýite also occurs at the Hugo pegmatite, peripheral to the Harney Peak Granite, Keystone, South...South Dakota. Data on its composition and structure derived from both localities led to approval by the |
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Hugo Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA