The Small series consists of moderately deep well drained soils that formed in slope alluvium derived dominatly from weathered rhyolite and influenced by loess.
Small soils are on nearly level to undulating mountain slopes.
Permeability is moderate and slopes range from 1 to 60 percent. Broad soils have a soil temperature that ranges from 44 to 46 degrees F, and have a calcic horizon at 23 to 36 inches. Drage soils have less than 15 percent calcium carbonates and are very deep. Searla soils are greater than 40 inches deep, and contain 60 to 80 percent coarse fragments in the argillic. Sheep Creek soils have very cobbly B2t horizons and are underlain by limestone.