In some pedons, the Bt horizon has faint redoximorphic features in the lower part. Consistence is friable or firm. Reaction ranges from moderately acid to mildly alkaline. Some pedons have a BC horizon that is neutral or slightly alkaline and has a lower clay content than the overlying Bt horizon. The C horizon has colors similar to the Bt horizons.
Reaction ranges from slightly acid to moderately alkaline.
The Dunkirk soil is the only series in the same family. The Allard , Amboy , Collamer , Hudson , and Unadilla series are similar soils in related families. Allard, Amboy, and Unadilla soils have less than 18 percent clay in the particle-size control section. Collamer soils have distinct or prominent redoximorphic features in the upper part of the B horizons. Hudson soil have more than 35 percent clay in the B horizon.