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Interval from the Top of the Ancell Group to the Top of the Ironton Formation in Cook County, Illinois


large image of the interval from the top of the Ancell Group to the top of the Ironton Formation in Cook County, Illinois

 




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ILLINOIS STATE GEOLOGICAL SURVEY
INSTITUTE OF NATURAL RESOURCE SUSTAINABILITY     |    UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN

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Updated 2/5/2007 SLD