Exteriors of peds have coatings with chroma of 1 to 4. Texture is silty clay loam, clay loam, silt loam, or loam. Reaction ranges from strongly acid to strongly alkaline in the upper part and from slightly alkaline to strongly alkaline in the lower part. Carbonates are common, but are not everywhere present. Texture is silt loam, loam, silty clay loam, or clay loam.
Reaction is slightly alkaline to strongly alkaline.
These horizons have a wide range of both colors and textures. None of these soils have a concentration of exchangeable sodium in the series control section. Grantfork soils are on erosional side slopes of the dissected Illinoian till plain, primarily along drainageways. Slope ranges from 2 to 20 percent. These soils contain a concentration of exchangeable sodium in the subsoil.