Old channels and oxbows dissect these areas. The Clamo soils formed in clayey alluvial sediments. Slopes range from 0 to 2 percent. The mean annual temperatures range from 45 to 52 degrees F, and the mean annual precipitation from 17 to 26 inches. These include the Baltic , Bon , Betts , Durrstein , James , Lamo , Luton , and Roxbury soils.
Baltic soils are in depressions and contain free carbonates to the surface.
Bon and Roxbury soils contain less clay and have loamy control sections and are on slightly higher landscapes than the Clamo soils. Betts soil have a fine-loamy control section and do not have an aquic moisture regime and are on steep adjacent uplands. Durrstein soils have a natric horizon and are on similar landscapes with microrelief. James, Lamo, and Luton soils are on similar landscapes as the Clamo soil. James soils have carbonates at or near the surface and contain more salts.