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Coarse-grained Materials Within 50 Feet of the Ground Surface in Illinois
Entry ID: IGDNR_ALLST_AQ50_2.0

Abstract: This map shows the distribution of coarse-grained materials and permeable
bedrock within 50 feet of ground surface in Illinois. This includes bedrock,
sand and gravel, and alluvial units with characteristics that suggest a
potential to store or conduct groundwater and yield potable water to wells and
springs. It was derived from stack-unit map data in the ISGS data set ... View entire text
Related URL
Description: Data available in Arc/Info export format.

Description: FGDC metadata on the Coarse-grained Materials Within 50 Feet of the Ground
Surface in Illinois.
Geographic Coverage
Spatial coordinates   
  N: 42.5   S: 36.95   E: -87.38   W: -91.58
Max Depth: 50 FT

Data Set Citation
Dataset Originator/Creator: Riggs, M.H., D. Nelson, C.C. Abert
Dataset Title: Coarse-grained Materials Within 50 Feet of the Ground Surface in Illinois
Dataset Series Name: ISGS GIS Database
Dataset Release Date: 1997-01-01T00:00:00.000Z
Dataset Release Place: Champaign, Illinois
Dataset Publisher: Illinois State Geological Survey
Version: 2.0
Issue Identification: aq50
Data Presentation Form: map
Other Citation Details: Scale is 1:250,000
Temporal Coverage
Start Date: 1996-01-01
Access Constraints None
Use Constraints Suitable for regional applications only (1:250,000 scale or smaller). The
Illinois State Geological Survey does not guarantee the validity or accuracy of
these data. Data set is not to be redistributed. Any product that uses this
data must cite the Illinois State Geological Survey.

It is important to realize ... View entire text
Data Set Progress
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: 13.7 MB
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
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Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2004-03-04
Last DIF Revision Date: 2018-07-26