Major Bedrock Aquifers Within 300 Feet of Ground Surface
Entry ID: IGDNR_ALLST_AQMB300

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Summary
Abstract: This map shows the distribution of major bedrock aquifer units within 300 feet
of ground surface containing potable water in Illinois. Major aquifers are
capable of yielding 70 gallons of water per minute. Potable water contains less
than 2,500 milligrams per liter of total dissolved solids. Bedrock aquifers
within 300 feet of ground surface cover most of northern Illinois and are
commonly overlain only by thin layers of less permeable silts and clays. Many
are directly overlain by shallow or major sand and gravel aquifers allowing
direct hydrologic communication with shallower aquifer systems. Stratigraphic
units considered to be major bedrock aquifers are:

Hunton Limestone Megagroup
Ancell Group
Prairie du Chien Group
Ironton-Galesville Sandstone
Elmhurst-Mt. Simon Sandstone

Coverage is intended to identify areas of Illinois where major bedrock aquifers
exist. These data are appropriate for regional thematic analysis.

Related URL
Link: GET DATA
Description: Data available in Arc/Info export format.


Link: VIEW EXTENDED METADATA
Description: FGDC metadata on the Major Bedrock Aquifers Within 300 Feet of Ground Surface.


Geographic Coverage
 N: 42.5015 S: 36.9535  E: -87.3838  W: -91.5828

Data Set Citation
Dataset Originator/Creator: Miller, Jerry
Dataset Title: Major Bedrock Aquifers Within 300 Feet of Ground Surface
Dataset Series Name: ISGS GIS Database
Dataset Release Date: 1994
Dataset Release Place: Champaign, Illinois
Dataset Publisher: Illinois State Geological Survey
Version: 2.0
Issue Identification: aqmb300
Data Presentation Form: map
Other Citation Details: Component of a published map Scale is 1:500,000


Temporal Coverage
Start Date: 1986-01-01


Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ILLINOIS


Science Keywords
BIOSPHERE >TERRESTRIAL ECOSYSTEMS >KARST LANDSCAPE    [Definition]
TERRESTRIAL HYDROSPHERE >GROUND WATER >AQUIFERS    [Definition]
LAND SURFACE >GEOMORPHOLOGY >KARST LANDFORMS/PROCESSES    [Definition]
SOLID EARTH >GEOMORPHIC LANDFORMS/PROCESSES >KARST LANDFORMS    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >BEDROCK LITHOLOGY    [Definition]


ISO Topic Category
BIOTA
GEOSCIENTIFIC INFORMATION


Access Constraints
None


Use Constraints
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 redistribution to consultants working for the
licensee, and then only for purposes, related to work for the licensee. Such
consultants may not further reproduce or redistribute these data sets. None of
these data shall be electronically duplicated on magnetic or optical media for
use by others, in whole or in part, without permission of the appropriate
custodial division within DNR.

Any hardcopies utilizing DNR data sets shall clearly indicate their source. If
the licensee has modified the data in any way they are obligated to describe
the types of modifications they have performed on the hardcopy map. Licensee
specifically agrees not to misrepresent DNR data sets, nor to imply that
changes they made were approved by DNR.

These data are not to be used for commercial profit.


Keywords
GIS
Geographic Information Systems
Geology
Hydrology
Hydrogeology


Data Set Progress
COMPLETE


Originating Center
ISGS


Data Center
Geological Survey, Dept. of Natural Resources, Illinois    [Information]
Data Center URL: http://www.isgs.uiuc.edu/

Data Center Personnel
Name: DATABASE ADMINISTRATOR ILLINOIS STATE GEOLOGICAL SURVEY
Phone: 217-333-5102
Fax: 217-333-2830
Email: denhart at nomad.isgs.uiuc.edu
Contact Address:
615 East Peabody Drive
City: Champaign
Province or State: Illinois
Postal Code: 61820
Country: USA



Distribution
Distribution_Media: Online
Distribution_Size: 1.7MB
Distribution_Format: Arc/Info export format
Fees: No fees


Personnel
TYLER B. STEVENS
Role: DIF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA


MATT RIGGS
Role: TECHNICAL CONTACT
Phone: 217-244-2425
Fax: 217-333-2830
Email: riggs at geoserv.isgs.uiuc.edu
Contact Address:
Illinois State Geological Survey
615 East Peabody Drive
City: Champaign
Province or State: Illinois
Postal Code: 61820
Country: USA



Creation and Review Dates
DIF Creation Date: 2004-03-04
Last DIF Revision Date: 2009-03-26

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