The Sexton soils are the poorly drained member of a drainage sequence that includes the well drained Camden soils and the somewhat poorly drained Starks soils. It is also associated with the well drained St. Charles soils and the somewhat poorly drained Kendall soils which are formed in 40 to 60 inches of loess or silty material and the underlying outwash. The potential for surface runoff ranges from low to high. Permeability is slow. An intermittent perched seasonal high water table is within a depth of 1 foot at some time between January and June in normal years.
Native vegetation is hardwood forest.
Shelby County, Illinois, 1939. Placement of the Sexton series in the Chromic Vertic great group will remain for the time being. It is likely these soils are not Vertic and will classify as Typic Epiaqualfs. There currently are no series classified as Fine, Smectitic, mesic Typic Epiaqualfs. A commonly flooded phase of Sexton is presently recognized.