Middle to early-late Wisconsin glaciation in north central Iowa: timing, distribution, and implications for reconstructions of the Laurentide Ice Sheet during MIS 3

Data from new subsurface studies, lithologic analyses, radiocarbon dating, and geologic mapping demonstrate that an early middle Wisconsinan (MIS 3) to late Wisconsonan (MIS2) till sheet is more widespread in northcentral Iowa than previously assumed. This till had been mapped to the west of and ben...

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Bibliographic Details
Main Author: Kerr, Phillip James
Other Authors: Bettis, Elmer A.
Format: Others
Language:English
Published: University of Iowa 2018
Subjects:
Online Access:https://ir.uiowa.edu/etd/6445
https://ir.uiowa.edu/cgi/viewcontent.cgi?article=7945&context=etd