Reaction of the B horizon ranges from slightly to strongly acid. The IIIB horizon formed in residuum weathered from limestone. It commonly has hue of 5YR, value of 3 or 4 and chroma of 3 or 4. The IIIB horizon commonly is 2 to 5 inches thick but ranges to 10 inches. In pedons that contain the upper boundary of the IIIB within 40 inches, the thickness of the IIIB is 5 inches or less.
Texture is silty clay or clay with a variable content of chert.
Content of clay commonly ranges from 45 to 70 percent. The finest textured horizon is below 3 feet and commonly is the deepest horizon in the solum. These are the Argyle , Baltimore , Bassett , Blooming , Cadmus , Caleb , Crocker, Dowagiac , Dunbridge , Gara , Lester , Longlois , Lydick , Mohawk , Neda , Octagon , Orwood , Racine , Razort , Renox , Waucoma , and Winneshiek . All the soils except Dunbridge, Waucoma, and Winneshiek lack a lithic contact within depths of 60 inches. Dunbridge and Winneshiek have a lithic contact at depths less than 40 inches.