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Bedrock Geology of Illinois

Abstract: This map shows the distribution and extent of the bedrock geologic units within
the State of Illinois, as depicted on the Geologic Map of Illinois (1967) by
Willman and others, published by the Illinois State Geologic Survey.

This data can be used for any project which requires bedrock data at a scale of
1:500,000. This data should not be used at a scale larger than 1:500,000. Not
suitable for site specific work.
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Description: Data available in Arc/Info export format.

Description: FGDC metadata on the Bedrock Geology of Illinois.
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Caption:  Bedrock Geology of Illinois
Geographic Coverage
Spatial coordinates   
  N: 42.5   S: 36.95   E: -87.38   W: -91.58

Data Set Citation
Dataset Originator/Creator: Illinois State Geological Survey
Dataset Title: Bedrock Geology of Illinois
Dataset Series Name: ISGS GIS Database
Dataset Release Date: 1996
Dataset Release Place: Champaign, Illinois
Dataset Publisher: Illinois State Geological Survey
Version: 1.0
Issue Identification: bedgeo
Data Presentation Form: map
Other Citation Details: The map scale is 1:500,000
Temporal Coverage
Start Date: 1967-01-01
Access Constraints None
Use Constraints Should be used at a scale of 1:500,000 or smaller. For regional studies only.
Not suitable for site specific work.

Reproduction or redistribution of copyrighted digital data sets or products
derived therefrom outside of licensee's organization or entity is expressly
forbidden. The only exception is ... View entire text
Data Set Progress
Originating Center
Data Center
Geological Survey, Dept. of Natural Resources, Illinois Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 217-333-5102
Fax: 217-333-2830
Email: denhart at
Contact Address:
615 East Peabody Drive
City: Champaign
Province or State: Illinois
Postal Code: 61820
Country: USA
Distribution Media: Online
Distribution Size: 8.9MB
Distribution Format: Arc/Info export format
Fees: No fees
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2004-03-04
Last DIF Revision Date: 2018-02-05