TY - RPRT TI - Map showing geologic structure and altitude of the top of the Minnelusa Formation and orientation of mapped cave passages in the Madison Limestone, southern Black Hills, South Dakota AU - K. D. Peter AU - K. R. Mills AU - C. L. Loskot PY - 1991 DO - 10.3133/wri864167 UR - https://pubs.usgs.gov/publication/wri864167 ID - wri864167 ER -