For use in MLRA 151 of LRR T.
A layer 10 cm (4 inches) or more thick in which 60 percent or more of the matrix has value of 4 or more and chroma of 2 or less and there are no redox concentrations. This layer starts at a depth less than or equal to the upper 20 cm (8 inches) from the soil surface.
User Notes: This indicator is applicable in accreting areas of the Mississippi River Delta.