These are the Atsion , Deerfield , Hempstead , Sudbury , Riverhead and Plymouth soils. Hempstead soils occur on nearby better drained landscapes and contain less sand and gravel. Riverhead soils have thicker loamy mantles over stratified sand and gravel, lack an umbric epipedon and are better drained. Plymouth soils lack an umbric epipedon, contain fewer rock fragments and are better drained. Moderately well drained.
Surface runoff is slow or medium.
Permeability is moderately rapid in the solum and very rapid in the substratum. It occurs in linear depressions within the Hempstead soil area. The soil is of small extent. Nassau-Suffolk soil survey, issued in 1928.