The C horizon commonly contain more and larger coarse fragments than the Bw horizons. These are the Ashe , Ditney , Hazel , Riverhead , and Steinsburg series in the same family and geographically associated. Ashe, Ditney, Hazel, Riverhead, and Steinsburg soils are 20 to 40 inches deep to rock. The Brookshire series are closely similar soils. They have dark surface layers.
Riverhead soils have sandy or sandy-skeletal substrata.
Maymead soils are on the lower parts of very steep mountainsides and in coves. Slope gradient ranges from about 8 to 50 percent. Elevation ranges from about 1,800 to 3,200 feet above sea level. The soil formed in local alluvium moved downslope from areas underlain by feldspathic quartzite, graywacke, arkosic sandstone, granite, and gneiss. These soils are in areas having about 54 inches average annual precipitation and about 50 degrees to 55 degrees F. average annual temperature.