These include the moderately well drained Horseneck soils and the and the somewhat poorly drained Pompton soils on higher positions on the landscape, and the poorly drained Preakness , Passaic and Parsippany soils on similar positions on the landscape. Permeability is moderate in the surface horizons, moderately slow to slow in the Bt horizon, and moderate to moderately rapid in the lower subsoil and substratum. In most years an apparent seasonally high ground water table is at or near the surface throughout the winter and early spring and following periods of heavy rainfall. Areas adjacent to major streams are subject to seasonal flooding. Most areas are used as woodland or meadows.
Native vegetation is commonly pin oak, red maple, birch, and white oak.
The series is of small extent. Essex County, New Jersey, 1999. It is named for the nearby Great Piece Meadows in the Town of Fairfield. Cation exchange activity class placement is pending.