Elevation ranges from 600 to 1000 feet. Near the Type Location these are the Elevasil , Farrington , Finchford , Komro , and Plainfield series. The well drained Elevasil soils are on nearby hills and formed in a loamy eolian or slope alluvium mantle over siliceous sandy residuum and are underlain by sandstone bedrock at a depth of 20 to 40 inches. The somewhat poorly drained Farrington soils, the moderately well drained Komro, and the excessively drained Plainfield and Finchford soils, formed in more than 60 inches of sandy outwash on nearby positions on valley trains. Surface runoff is slow to very rapid.
Permeability is rapid in the sandy mantle and moderately slow or moderate in the sandstone.
Most areas with slopes less than 6 percent are used for cropland. Corn, soybeans, small grain, and hay are the principal crops. Most of the steeper areas are used for woodland or pastureland. Native vegetation is mixed deciduous and pine forest. Common trees are northern pin oak and jack pine.