Illinois County Geologic Map (ICGM) - Illinois State Geological Survey

 
The ICGM series includes geologic and other maps depicting county or other regional areas typically at a 1:62,500 or 1:100,000 scale. Geologic map themes include surficial geology, bedrock geology, drift thickness and other isopachous maps, bedrock topography and other structure contour surfaces, and others. The series includes other map themes, such as landscape topography (e.g., hillshaded relief maps derived from digital elevation models), geochemical trends, hydrogeologic attributes, aquifer sensitivity, and distribution of data. They may include stratigraphic legends, brief descriptive text or longer associated reports, geologic cross sections or models, and illustrative diagrams and tables. ICGM maps are peer reviewed and conform to ISGS standards at the time of public release. This series was started in 2007.

Recent AdditionsRSS feed

  • Domier, Jane E.J.; Luman, Donald E. (Illinois State Geological Survey, Prairie Research Institute, 2014)
    "North American Datum of 1983 (NSRS2007), North American Vertical Datum of 1988. Vector base data from 2013 TIGER/Line Shapefiles provided by the United States Census Bureau."/ Includes location map, text, 1 illustration, ...

    application/pdf

    application/pdfPDF (60MB)
  • Domier, Jane E.J.; Luman, Donald E. (Illinois State Geological Survey, Prairie Research Institute, 2014)
    "North American Datum of 1983 (NSRS2007), North American Vertical Datum of 1988. Vector base data from 2013 TIGER/Line Shapefiles provided by the United States Census Bureau."/ Includes location map, text, 1 illustration, ...

    application/pdf

    application/pdfPDF (118MB)
  • Domier, Jane E.J.; Luman, Donald E. (Illinois State Geological Survey, Prairie Research Institute, 2014)
    "North American Datum of 1983 (NSRS2007), North American Vertical Datum of 1988. Vector base data from 2013 TIGER/Line Shapefiles provided by the United States Census Bureau."/ Includes location map, text, 1 illustration, ...

    application/pdf

    application/pdfPDF (96MB)
  • Domier, Jane E.J.; Luman, Donald E. (Illinois State Geological Survey, Prairie Research Institute, 2014)
    "North American Datum of 1983 (NSRS2007), North American Vertical Datum of 1988. Vector base data from 2013 TIGER/Line Shapefiles provided by the United States Census Bureau."/ Includes location map, text, 1 illustration, ...

    application/pdf

    application/pdfPDF (73MB)
  • Domier, Jane E.J.; Luman, Donald E. (Illinois State Geological Survey, Prairie Research Institute, 2014)
    North American Datum of 1983 (NSRS2007), North American Vertical Datum of 1988. Vector base data from 2013 TIGER/Line Shapefiles provided by the United States Census Bureau."/ Includes location map, text, 1 illustration, ...

    application/pdf

    application/pdfPDF (43MB)

Collection Statistics