These are the Chalmers , Chetomba , Dolbee , Drummer , Dunham , El Paso, Elvira , Garwin , Hartsburg , Madelia , Mascoutah , Maxcreek , Maxfield , Ossian , Patton , Pella , Rushmore , and Wacousta series. Chalmers soils have less than 20 percent clay in the lower part of the series control section. Chetomba, Drummer, Dunham, El Paso, Elvira, Maxcreek, Maxfield, Pella, and Rushmore soils average more than 8 percent sand in the lower part of the series control section. Garwin soils are higher in total phosphorus and organic phosphorus, contain less clay films and dark coatings on faces of prisms in the lower part of the B horizons, are lower in iron oxides in the lower part of the B and C horizons, and contain more total clay sized particles to a depth of 60 inches. Hartsburg, Madelia, and Wacousta soils have carbonates within a depth of 40 inches.
Sable soils are on level or nearly level summits of loess-covered moraines and stream terraces.
Typically, they are on broad interstream divides of till plains, and less commonly on unglaciated hills and on terraces. Slope gradients range from 0 to 2 percent. Sable soils formed entirely in loess. These are the Denny , Ipava , Muscatune , Osco , and Tama soils. The poorly drained Denny soils are in shallow closed depressions and have an albic horizon and an argillic horizon.