The Southern Iowa Drift Plain is certainly the largest of Iowa’s landform regions and it is the primary region travelers on Interstate 80 will see. Noted Iowa artist Grant Wood emphasized the steeply rolling character of this landscape in many of his stylized paintings, especially Young Corn and Fall Plowing.
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The four watersheds areas involved in the Iowa Watersheds Project. The
Geography of Iowa - Wikipedia
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Landforms of Iowa Iowa Geological Survey - The University of Iowa
Geography of Iowa - Wikipedia
Southern Iowa Drift Plain Iowa Geological Survey - The University of Iowa