The depth to limestone bedrock ranges from 40 to 60 inches and is considered to be a lithic contact. The dominant clay mineral in the loess and upper part of the IIB2t horizon developed from glacial till is montmorillonite. Illite increases with depth in the IIB2t horizon and becomes the dominant clay mineral in the lower part of the IIB2t. The A1 or Ap horizon has hue of 10YR, value of 2 or 3, and chroma of 1 or 2. Commonly a B1 horizon and in some pedons a thin B2 horizon has formed in loess.
Texture is silty, clay loam.
Many of the properties of the IIB and IIIB horizons are believed to have been inherited from an exhumed Paleosol of late Sangamon Age. Hue of 5YR or redder is present on faces of peds or in the matrix in at least on subhorizon of the IIB horizon. The texture of the IIB horizon typically is clay loam, but includes thin subhorizons of sandy clay loam in some pedons. The upper 20 inches of the argillic horizon averages between 27 and 35 percent clay and from 15 to 35 percent fine sand or coarser. Reaction of the B horizon ranges from medium to strongly acid except in the IIIB horizon which ranges from neutral to medium acid.