For use in all LRRs.
A histic epipedon underlain by mineral soil material with chroma of 2 or less.
User Notes: The surface horizon of most histic epipedons has organic soil material 20 cm (8 inches) or more thick (fig. 9). Aquic conditions or artificial drainage is required. See “Keys to Soil Taxonomy” (Soil Survey Staff, 2022) for a complete definition.