They typically are stratified and range from sandy loam to clay. They commonly are very strongly acid to moderately acid but range to neutral in thick layers of silty clay and clay. In pedons that have a 2B horizon at a depth of less than 24 inches, a 3B or 3C horizon commonly is identified at the contact with underlying stratified materials. These are the Aldino , Ava , Boston , Cincinnati , Grantsburg , Hildebrecht , Hosmer , Lawrenceville , Mercer , Nicholson , Otwell , Rainsboro , Weisburg , and Zanesville series. A similar soil is the Monongahela series.
Aldino soils have angular pebbles of quartzite and flakes of mica in the lower part of the solum.
Ava soils have bisequal soil development. Boston, Mercer, Nicholson, and Weisburg soils formed partly in residuum from bedrock and do not have stratification in the lower part. In addition, Boston and Weisburg soils have some coarse fragments of mixed lithology from glacial till, Boston soils have redder hue, and Mercer soils have thinner solum. Cincinnati soils have mixed coarse fragments from glacial till in the lower part of the solum. Grantsburg and Hosmer soils formed in loess do not have stratification in the lower part of the solum, and do not contain coarse fragments.