Reaction ranges from slightly acid to slightly alkaline. Some pedons contain carbonates in the lower part. Redoximorphic features are commonly present with chroma of 1 to 8. Texure typically is silty clay loam but ranges to silt loam or silty clay in some subhorizons and is stratified in some pedons. Clay content ranges from 25 to 42 percent and sand content is less than 20 percent.
Reaction is neutral to moderately alkaline and contains carbonates in some pedons.
These are the Clamo , Derrynane , Okoboji , Rantoul , Shiloh , Wabash , Zoe , and Zook series. Clamo and Zoe soils typically are shallower to the base of soil development and generally have carbonates at depths less than 30 inches. Derrynane soils average greater than 20 percent sand in the lower part of the series control section. Okoboji soils have weaker structure in most or all subhorizons and commonly have carbonates at shallower depths. Wabash and Rantoul soils average greater than 45 percent clay in the particle-size control section.