Browse Illinois State Geological Survey (ISGS) by Contributor "Stiff, Barbara J."

  • Kolata, Dennis R. (Illinois State Geological Survey, Department of Natural Resources, 2005)
    This map is a revision of the 1:500,000 Geologic Map of Illinois compiled by Willman et al. (1967)."/ Includes a source map and ancillary map: "Areas mapped since 1967."/ "3M - 8/05."/ On verso: Two cross sections, 2 ...

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  • Barnhardt, Michael L.; Berg, Richard C. (Illinois State Geological Survey, Department of Natural Resources, 2005)
    The Pilot Study for the Central Great Lakes Geologic Mapping Coalition (CGLGMC) focused on the Antioch Quadrangle, Lake County, Illinois developing a series of maps and digital products, several protocols for database ...

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