Search Results for the EPA National Library Catalog

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Your Search: (SUBJECT=Illinois Geology)


 
 
 
Select Item Title Year Published
Definition of Wisconsinan Stage : the Wisconsinan Stage and its Altonian, Farmdalian, Woodfordian, Twocreekan, and Valderan Substages are described as time-stratigraphic units of the Pleistocene of Illinois and Wisconsin / 1968
Stack-unit mapping of geologic materials in Illinois to a depth of 15 meters / 1988

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