These soils formed in volcanic ash and loess over residuum from metamorphic rock. The average annual precipitation is 30 to 55 inches and the frost-free season is 50 to 110 days. Crumarine soils are on narrow valley floors and are somewhat poorly drained. Kauder soils are on foothills and have a fragipan. Kruse soils are on mountains and foothills and have loam subsoils and loamy sand substratums.
Hugus soils are on mountains and are loamy-skeletal.
Teakean soils are on mountains, are deep to a fragipan and have a xeric moisture regime. This soil is used mainly for timber production, livestock grazing, wildlife habitat and watershed. The natural vegetation is mainly western redcedar, grand fir, Douglas-fir, western larch, Pacific yew, common snowberry, strawberry, common princes pine, sweetscented bedstraw, Myrtle pachystima, western rattlesnake plantain, and longtube twinflower. Clearwater County, Idaho, 1980. Classification was changed to Ashy over loamy, amorphic over mixed, superactive, frigid Alfic Udivitrands in 1998.