The Swanner series consists of shallow, well drained soils that formed in loess and silty alluvium and material weathered from rhyolite, andesite and other igneous rocks.
Permeability is moderate.
These soils are on mountain slopes and ridges and have slopes of 0 to 80 percent. Swanner extremely stony loam, rangeland. These are the Agassiz , Anatone , Bocker , Cedaran , Falula , Foxol , Little Pole , Rexmont , and Van Wagoner series. The Agassiz soils are somewhat excessively or excessively drained. The Anatone and Bocker soils have hue of redder than 10YR in the B horizons.