medial over loamy, amorphic over mixed, active Andic Haplocryod

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, Bhs, and Bs1 horizons have silt loam textures and contain 25-30% volcanic glass. The E horizon has a pH of 3.7 and the Bhs and Bs1 horizons have P-retention of 95-96%.