The 2Bt or 2BC horizon is silty clay loam, silt loam, loam, or clay loam. It contains more sand than the overlying loess, and typically contains some pebbles. Reaction is moderately acid to neutral. The 3Btgb horizon has hue of 10YR, 2.5Y or 5Y, or is neutral, value of 4 through 6, and chroma of 0 through 3 and is mottled. It typically is clay loam or clay, but is silty clay or silty clay loam in some pedons.
Reaction is slightly alkaline to strongly acid.
These are the Assumption , Aviston , Barrington , Blackberry , Catlin , Clare , Dana , Danabrook , Geryune , Graymont , Keltner , Saybrook , and Totanang series. Assumption and Clare soils have more than 15 percent sand in some horizon above a depth of 40 inches. Aviston soils formed in more than 60 inches of loess and have less than 15 percent sand in the lower part of the series control section. Barrington, Catlin, Dana, Danabrook, Geryune, Graymont, and Saybrook soils have carbonates at depths of less than 60 inches. Blackberry soils average less than 30 percent clay in the lower part of the series control section.