Terric Fibric Mesisol (TFI.M)
Common horizon sequence: Of, Om or Oh, Om , Of, C, Om
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 both a terric layer (an unconsolidated mineral layer at least 30 cm thick) beneath the surface tier and a subdominant fibric layer thicker than 25 cm in the control section. These soils may also have cumulic and limnic layers but lack humic and hydric layers.
Note: Diagnostic horizons are underlined.