The Cottle series consists of shallow, well drained soils on foothills. They formed in residuum and colluvium from welded rhyolitic tuff or related rocks.
Permeability is moderately slow.
Slopes range from 2 to 40 percent. The surface has 1 to 3 percent cover of stones. These are the Atlow , Boomstick , Checkett , Gabbvally , Hooplite , Olac , Old Camp , Phliss , Rowel , Soughe , Stewval , and Thike series. Atlow soils are moderately to strongly alkaline in the argillic horizon and lack evidence of secondary silica. Boomstick, Olac and Soughe soils are noncalcareous in all parts.