Black Chernozems that have a slickenside horizon within 1 m of the mineral soil surface and faint to distinct mottles within 50 cm of the mineral soil surface
Other Black Chernozems that have an eluvial horizon or horizons (Ahe, Ae, or Aej) at least 2 cm in thickness, usually underlain by a Btj or Bt horizon, and have faint to distinct mottles within 50 cm of the mineral soil surface
Other Black Chernozems that lack a B horizon or have a B horizon <5 cm in thickness and have faint to distinct mottles within 50 cm of the mineral soil surface
