Datasets > Illinois > 2005-2009

Elevation of the Base of the Barlow Limestone [Illinois]

Illinois State Geological Survey · 2008 Full Details

Full Details

Title
Elevation of the Base of the Barlow Limestone [Illinois]
Description
This datafile shows the general elevation of the base of the Barlow Limestone in Illinois.�� These 20- and/or 100-foot isolines were contoured using Geographix and Z-map Plus software.�� The contours were created using over 50,000 data points from the ISGS Oracle database.�� The data covers only those portions of the state where the formation is present and does not include any coverage outside of Illinois where the formation may be present.�� The data was contoured using fault lines for control and manual adjustments were made to the contours as a final refinement of the computer created contours.�� This data set is intended for use at a scale of 1:100,000 or greater. This data set was created as part of an effort to update some of the ISGS map products utilizing new data and software capabilities.�� This data set was developed in order to create an updated version of the map published by H.M. Bristol in 1968.�� These data are appropriate for use in local and regional thematic analysis.�� The data are not appropriate as a geodetic, legal or engineering base.
Creator
Illinois State Geological Survey
Temporal Coverage
2008
Access Rights
Public
Format
File
Language
English
Date Added
August 28, 2025

Location

Download

Links

Cite and Reference

  • Citation
    Illinois State Geological Survey (n.d.). Elevation of the Base of the Barlow Limestone [Illinois]. . https://clearinghouse.isgs.illinois.edu/data/geology/elevation-base-barlow-limestone (dataset)
  • BTAA Geoportal Link

View more items like this one...

Elevation of the Base of the Barlow Limestone [Illinois]

Elevation of the Karnak Limestone [Illinois]

Elevation of the New Albany Shale [Illinois]

Bedrock Topography [Illinois]

Quaternary Deposits, 1996 [Illinois]

1996

Glacial Drift Thickness and Character [Illinois]

Structural Features: Anticlines, Synclines, and Monoclines [Illinois]

Bedrock Valleys [Illinois]

Driftless Areas [Illinois]

Structural Features: Faults, Grabens, and Flexures [Illinois]