1. Geologic map of the Rapid City NW quadrangle, Meade and Pennington counties, South Dakota [cartographic material] Yale Public content 1973. 2012-04-10T15:27:26Z. 2012-04-16T15:51:12Z. Geological Survey (U.S.). The Survey. English. Public. South Dakota, Meade County, and Pennington County.