The Bg2 horizon has hue of 5Y or 2.5Y, value of 3 to 5, and chroma of 1 or 2. Available chemical data indicate that the minimum total phosphorus content is in the upper part of the B horizon and exceeds 500 ppm. The BCg horizon has hue of 5Y or 2.5Y, value of 4 or 5, and chroma of 1 or 2. It is silty clay loam or silt loam. The Cg horizon has hue of 5Y or 2.5Y, value of 4 to 6, and chroma of 1 or 2.
Mottles have higher chroma.
Clay content of the Cg horizon typically ranges from 20 to 26 percent. A sandy substratum phase is recognized. These are the Chalmers , Dolbee , Drummer , Elvira , Hartsburg , Leshara , Madelia , Marcus , Maxcreek , Maxfield , Ossian , Patton , Pella , Rushmore , Sable , and Wacousta series in the same family and the Muscatine , Taintor , and Winterset series. Chalmers soils have slower permeability in the lower part of the solum and have glacial till parent material in the lower part of the solum. Dolbee soils formed in alluvium and have a less systematic increase or decrease in silt and clay-size particles with depth.