Directory > Regional > North America > United States > Regions > Midwest > Maps and Views Central Great Lakes Geologic Mapping Coalition Partnership for the purposes of producing detailed, three dimensional surficial materials maps of the central Great Lakes States. Includes downloadable fact sheet and background of this partnership with Geological Surveys of Illinois, Indiana, Michigan, and Ohio, and USGS. http://www.michigan.gov/deq/0,1607,7-135-3311_4112_4233---,00.html Reviews Rating: Not yet Rated
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