9 pls. Scale 1:100,000 and smaller. Pl. 1, data-base; pl. 2, bedrock geology; pl. 3, surficial geology; pl. 4, depth to bedrock and bedrock topography; pl. 5, Quaternary hydrogeology; pl. 6, bedrock hydrogeology; pl. 7, sensitivity of the Prarie du Chien-Jordan aquifer to pollution; pl. 8, geology and well construction; pl. 9, geologic resources. Supplementary files include some ESRI coverages digitized at a later date from the paper maps.