Uranium deposits that contain uraniferous pyrobitumen of possible hydrothermal origin occur at the Weatherly and Robinson properties near Placerville, San Miguel County, Colo. These deposits were mined for copper, silver, and gold more than 50 years ago and were developed for uranium in 1950.
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USGS Numbered Series
The Robinson and Weatherly uraniferous pyrobitumen deposits near Placerville, San Miguel County, Colorado