Norborne soils have mollic epipedons greater than 24 inches thick. Plattville soils have less gravel in the lower part of the solum and are underlain by limestone bedrock. Schoolcraft soils have sand and gravelly sand above a depth of 40 inches. Sibleyville soils have sola less than 34 inches thick and are underlain by sandstone or shale. Wea soils do not have mottles at depths less than 30 inches.
Tippecanoe soils are on outwash plains and terraces.
The slope gradient is 0 to 6 percent. Tippecanoe soils formed in loamy and gravelly loamy outwash or in as much as 20 inches of silty material and the underlying loamy and gravelly loamy outwash. Mean annual temperature ranges from 48 degrees to 53 degrees F. and mean annual precipitation ranges from 32 to 40 inches. These are the Comfrey , Crane , Free , and Wea soils. The very poorly drained Comfrey soils have mollic epipedons more than 24 inches thick, have gray subsoils and are on nearby flood plains.