The Chili series consists of very deep, well drained soils on outwash plains, terraces, kames, and beach ridges. They formed in Wisconsinan age outwash deposits, mainly of sandstone and shale with a large amount of quartz gravel.
Permeability is moderately rapid in the subsoil and rapid in the substratum.
Slopes range from 0 to 70 percent. Thickness of the silty mantle ranges from 0 to 18 inches. Thickness of the solum ranges from 40 to 80 inches. Depth to the base of the argillic horizon is 35 to 54 inches. Rock fragment lithology is mainly sandstone and shale, with a large amount of quartz gravel.