This soil is found at ~6000-ft elevation in the Selkirk Mountains of northern Idaho and is associated with subalpine fir forest. The upper part of this soil contains significant quantities of volcanic ash from the eruption of Mount Mazama and is underlain by very coarse-textured glacial till derived primarily from granite of the Kaniksu batholith. The E and Bs horizons have loam or silt loam textures and contain 25-30% volcanic glass. The E horizon has a pH of 3.7 and the Bs horizon has P retention of 95%.

(scale is in decimeters)