(A, A+E, A+B) dark, organic rich BS > 50% > 10 cm if on bedrock 18 - 25 cm if on soil

(A, A+E, A+B) same as Mollic Epipedon except BS < 50%

thin, light colored does not make criteria for Mollic or Umbric

organic O horizon > 20 cm thick > 12% OC saturated for at least 30 consecutive days/yr

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Diagnostic Horizons

Soils

Term	Definition
Mollic Epipedon	(A, A+E, A+B) dark, organic rich BS > 50% > 10 cm if on bedrock 18 - 25 cm if on soil
Umbric Epipedon	(A, A+E, A+B) same as Mollic Epipedon except BS < 50%
Ochric Epipedon	thin, light colored does not make criteria for Mollic or Umbric
Histic Epipedon	organic O horizon > 20 cm thick > 12% OC saturated for at least 30 consecutive days/yr