Definition of Wisconsinan Stage | 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
Frye, John C. (John Chapman) | Willman, H. B. (Harold Bowen) | Rubin, Meyer | Black, Robert F. (Robert Foster)
"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."
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