“…The stratigraphy of the loess sheets of Pleistocene age of Nebraska has been intensively studied (Lugn, 1934;Stout, 1945, 1948;Lueninghoener, 1947;Frankforter, 1950;Schultz, Lueninghoener, andFrankforter, 1948, 1951;Thorp, Johnson, and Reed, 1951;Schultz, Reed, and Lugn, 1951): The succession shown in table 8 is modified after Schultz, Lueninghoener, and Frankforter (1951). The Afton, Yarmouth, and Sangamon soils, as described by Thorp, Johnson, and Reed (1951), are all very strongly developed and generally similar.…”