The Norwidge series consists of very deep, well drained soils formed in loess and reworked loess with a mantle of volcanic ash. They area on hills. Permeability is moderately slow and slopes range from 5 to 42 percent. Norwidge medial silt loam, forested on a 10 percent slope at 2,950 feet elevation.
Aspect is southeast.
USGS Aldermand Ridge Quadrangle. Soil moisture - usually moist year round and not dry for 45 or more consecutive days from June to October. Depth to weak fragic characteristics - 30 to 57 inches. Elkberry soils lack fragic characteristics. Threebear soils have a fragipan.