For use along shorelines and near shore regions of the Great Lakes in LRRs K and L.

In coastal zones and dune-and-swale complexes, a layer 5 cm (2 inches) or more thick starting at a depth of 10 cm (4 inches) or less from the soil surface with chroma of 4 or less and 2 percent or more distinct or prominent redox concentrations.

User Notes: Along the shorelines of the Great Lakes within LRRs L and K, some wetlands exhibit the presence of high chroma sands (often chroma 3 to 4). These high-chroma, sandy soils occur at the landward edge of coastal marshes or in interdunal landscape positions of dune-and-swale complexes. These soils exhibit redox concentrations as pore linings, soft masses, or both starting at a depth of 10 cm (4 inches) or less from the soil surface. In adjacent upland areas, redox concentrations are absent or are only observed at a depth 15 cm (6 inches) or more from the soil surface. It may be helpful to involve a soil scientist to identify soils that qualify for this indicator.