Uranium in western Colorado
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Uranium deposits in western Colorado occur in rocks of many geologic ages and lithologic types. Bedded, vanadiferous deposits in continental, fluvial sandstones of the Salt Wash Member of the Morrison Formation of Jurassic age are the most important. A cluster of deposits in Mesa, Montrose, and San Miguel Counties comprises the Colorado segment of the Uravan mineral belt, the largest uranium area in Colorado. During the period 1948 through 1976, 15,589,100 tons of ore with an average grade of 0.23 percent U3O8 and containing 71,132,400 pounds of uranium oxide (U3O8) have been produced from western ...