Histic Eutric Turbic Cryosol (HE.TC)

Common horizon sequence: Om, Ah, Bmy or Bm (or both) or Cgy, Cz

These Turbic Cryosols have a relatively high degree of base saturation, as indicated by their pH, and thick (>15 cm) organic (peaty) horizons in the upper 1 m of the solum. They are identified by the following properties:

1. These soils have either a continuous surface organic horizon (Ohy, Hy) ranging in thickness from >15 to 40 cm, or a combination of surface and subsurface organic horizons >15 cm thick.
2. They have a Bm or Bmy horizon, or both, which is continuous over the imperfectly to well-drained part of the pedon.
3. The horizons, other than the Bm, are strongly disrupted by cryoturbation. Tongues of mineral and organic horizons, organic and mineral intrusions, and oriented stones commonly occur.
4. These soils have a pH (0.01 M CaCl₂) of 5.5 or greater in some or all of the B horizons.
5. The surface horizons are not strongly gleyed, but there is usually a gleyed horizon immediately above the permafrost table.

Note: Diagnostic horizons are underlined.

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