Powder River Basin
US Geological Survey geologist J. D. Love discovered uranium in 1951 near Pumpkin Buttes, about 25 miles northeast of Midwest, Wyoming. Other deposits were found along a 60-mile northwest-southeast trend in the southwest part of the Powder River Basin, and production began in 1953. The deposits are roll fronts in fluvial sandstones of the Eocene Wasatch Formation and underlying Paleocene Fort Union Formation. The principal ore minerals are uraninite, coffinite, metatyuyamunite, and carnotite. Gangue minerals are calcite, gypsum, pyrite, iron oxide, and barite.
Read more about this topic: Uranium Mining In Wyoming
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