The regolith is weathered from reddish quartzose conglomerate or fanglomerate. The average annual air temperature is 50 to 55 degrees F. Precipitation averages 40 to 48 inches. Frost free days range from 160 to 190. The Annandale , Duffield , Raritan , Rowland , Washington and the competing Edneyville and Penn soils are geographically associated. Annandale soils have a fragipan and the Duffield and Washington soils have base saturation higher than 35 percent and overlie limestone or limey conglomerate.
Raritan soils are on terraces and have a fragipan.
Rowland soils are on floodplains and lack an argillic horizon. Pattebug are well drained. Runoff is moderate to rapid depending on slope. Internal drainage is good. Permeability is moderately rapid in the B horizon and rapid in the C horizon.