1. Structural contours and Phanerozoic structures in the Rapid City, South Dakota 1:100,000 scale quadrangle [and] Structural contours and Phanerozoic structures in the Mount Rushmore, South Dakota 1:100,000 scale quadrangle [microform] Yale Public content 1994. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. South Dakota. Precambrian.