These are the Campus and Penden series. Campus soils have a lithic contact between depths of 20 and 40 inches. Penden soils do not have pebbles in the control section. In addition, Campus and Penden soils have warmer soil temperatures. Ethan soils are on upland till plains.
Slopes typically are short and irregular and surfaces are convex.
Slope gradient ranges from 1 to 40 percent. These soils typically formed in calcareous loam and clay loam glacial till and some silty glacial materials. Mean annual air temperature ranges from 45 to 52 degrees F., and mean annual precipitation ranges from 17 to 26 inches. These are the Betts , Bonilla , Clarno , Davison , Eakin , Egan , Hand , Homme , Houdek , and Prosper soils. Betts soils are on similar landscapes and do not have a mollic epipedon.