The Deforest Formation of Western Iowa: Lithologic Properties, Stratigraphy, and Chronology, April 1990

This report summarizes existing data on the DeForest Formation (Holocene alluvium) of western Iowa and presents a model aimed at understanding the causative factors behind long-term behavior of the fluvial system in the area. Investigations in six western Iowa watersheds are summarized and results are compared in order to gain an appreciation for both the overall stratigraphic and geomorphic similarity across the region, as well as the degree of local variability resulting from loess thickness patterns, geologic history, and stream size