The Radium King Mine, located in the Red Canyon Mining District, San Juan, Utah is encompassed within the current boundaries of the Bears Ears National Monument. Owned by Atlas Minerals Corp. during the time of its operation, miners extracted uraninite, pyrite, and chalcocite ores from the Chinle Formation (Shinarump Member). These miners ride ore carts out of the uranium mine [photo credits to Charlie Steen’s Collection] on their way to deposit the material for sorting and processing.