GROUND WATER ATLAS of the UNITED STATES
Iowa, Michigan, Minnesota, Wisconsin
Upper carbonate aquifer
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Figure 91 Map showing the location of the upper carbonate aquifer
downloadable tiff file J091.tif.gz (2MB
Figure 92 General hydrogeologic section
showing placement of the upper carbonate aquifer (215K)
downloadable tiff file J092.tif.gz (1.7MB