The soils developed in old alluvium from soils derived largely from acid sandstone and shales. Thickness of the alluvium ranges from 40 inches to 70 inches or more. Allegheny soils do not have a fragipan, Zoar is finer textured, Tygart and Purdy are more poorly drained. All upland associates do not have a fragipan and are shallower to bedrock. Moderately well drained.
Surface runoff is medium.
Permeability above the fragipan is moderate, in the pan it is moderately slow or slow. Most areas have been cleared of the original hardwood forest and used for pasture, cultivated crops, and industrial and residential sites. The series is extensive. Greene County, Pennsylvania, 1921.