Faxon soils have bedrock at depths of less than 40 inches. Gansner soils contain less gravel, formed in alluvium, and are at higher elevations. Reddick soils have more clay in the lower part of the solum. Selma soils contain less gravel in the lower part of the solum. Westland soils have argillic horizons.
Free soils are on terraces.
The slope gradient is 0 to 2 percent. Free soils formed in loamy and gravelly outwash. Mean annual temperature ranges from 50 to 52 degrees F, and mean annual precipitation ranges from 35 to 37 inches. These are the Comfrey , Crane , Tippecanoe , and Wea soils. The very poorly drained Comfrey soils have mollic epipedons more than 24 inches thick and are on flood plains.