Tripoli and Webster soils contain considerable amounts of montmorillonite. Wolcott soils are on nearly level or depressional Wisconsinan till plains. Slope gradient is from 0 to 2 percent. These soils formed in loamy glacial till. Conover soils lack mollic epipedons and are on slightly higher positions.
Corwin soils have an argillic horizon and are on gently sloping areas.
Montmorenci soils lack mollic epipedons and are on gently sloping areas. Odell soils have an argillic horizon and are on nearby higher topographic positions. Rensselaer soils are in similar positions and have an argillic horizon. Very poorly drained. Surface runoff is very slow or ponded.