Hydric Mesisol (HY.M)
Common horizon sequence: Of, Om or Oh, Om, W
Soils of this subgroup have the general properties specified for the Organic order and the Mesisol great group. They differ from Typic Mesisols by having a hydric layer (a layer of water that extends from a depth of not less than 40 cm to a depth of more than 1.6 m). These soils may also have fibric, humic, cumulic, terric, or limnic layers.
Note: Diagnostic horizons are underlined.