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Illinois geologic map data

A GIS database of geologic units and structural features in Illinois, with lithology, age, data structure, and format written and arranged just like the other states.

View

Show in a web browser window:

Show in Google Earth or other KML viewer:

ilgeol.kml (Uncompressed, 13.5M)

ilgeol.kmz (Compressed, 4.8M)

List geologic units by state or county

Show in your GIS using OGC web services:

https://mrdata.usgs.gov/services/il (WMS, version 1.3.0)

https://mrdata.usgs.gov/services/il (WFS, version 1.1.0)

Use lithology_symbology.lyr ArcGIS layer file to symbolize lithology when using WFS

Download

Content Download Format
Geological attributes ILcsv.zip CSV format
Geologic units ILgeol_dd.zip Shapefile, polygon
Faults ILfaults_dd.zip Shapefile, arcs
Colors for lithology lith6_2.style ArcMap Style [Instructions]

Documentation

Metadata:

Outline - Questions & Answers - Plain text - XML
Legend indicating the meaning of colors on the interactive map

Publication

Sources

Willman, H.B., and others, (compilers), 1967, Geologic Map of Illinois: Illinois State Geological Survey, scale= 1:500,000, paper.

Related topics

Geologic units in Illinois