The post-Yarmouthian Pleistocene of Kansas is characterized by extensive loess sheets which contain buried soils. The loesses and associated fluvial deposits are classed in Kansas as Crete, Loveland, Peoria, and Bignell members of the Sanborn formation. Based on lithologic characteristics, sequence, content of fossil mollusks, and stratigraphic continuity of buried soils, the members are identified throughout their extent in Kansas. Also trustworthy correlations with late Pleistocene deposits in Nebraska and Iowa, including the type Bignell and Loveland loesses, can be made. The Peoria loess of Kansas is shown by faunal evidence to be equivalent to the Peoria (Iowa and Tazewell) loess of central Illinois.
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Frye et al. (1951) studied this question.
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