These are the Houghtonville and Tunbridge series. Houghtonville soils are very deep. Tunbridge soils have a spodic horizon less than 16 inches thick or a Bhs or Bh horizon less than 4 inches thick. The Bangor , Battydoe , Beckett, Berkshire , Chatham , Chesuncook , Dekapen , Dixfield , Elliottsville , Glebe , Groveton , Hogback , Howland , Marlow , Mundal , Michigamme , Onota , Penquis , Plaisted , Potsdam , Revel , and Welcome soils are in closely related families. Battydoe, Chatham, Dekapen, Michigamme, Onota, Revel, and Welcome soils are from outside of Region R. Bangor, Battydoe, Beckett, Berkshire, Chatham, Chesuncook, Dekapen, Dixfield, Groveton, Howland, Marlow, Mundal, Plaisted and Potsdam soils have bedrock greater than 40 inches below the soil surface.
Elliottsville soils have more clay in the particle-size control section.
Glebe soils have a cryic temperature regime. Hogback soils are shallow. Michigamme soils formed in eolian material over glacial till. Onota soils have sandstone rock fragments in the pedon. Revel and Welcome soils have sandstone bedrock within 60 inches of the soil surface.