https://www.usgs.gov/publications/carnotite-bearing-sandstone-cedar-canyon-slim-buttes-harding-county-south-dakota
Carnotite-bearing sandstone in Cedar Canyon, Slim Buttes, Harding County, South Dakota | U.S....
Carnotite-bearing sandstone and clay have been found in the Chadron formation of the White River group of Oligocene age in the southern part of the Slim Buttes...