An alfisol is an abundant soil order, with a clay-enriched subsoil and relatively high native fertility.
An aqualf is a form of alfisol found in areas with a water table close to the surface.
An albaqualf is a variety of aqualf - an alfisol soil - with ground water above a slowly permeable clay horizon.
In humid areas historically covered by hardwood forest in the latitudes previously glaciated. Areas like the Alleghany Plateau and Southern New England.