Mean annual temperature ranges from 52 to 57 degrees F, and mean annual precipitation ranges from 40 to 47 inches. These are the Irondale , Knobtop , Loughboro , and Syenite soils. None of these soils have a fragipan. Irondale and Knobtop soils are associated with fine textured felsitic parent rock and are located at higher elevations and on steeper slopes. In addition, the Irondale soils are very stony and both Knobtop and Irondale soils are moderately deep to hard rock.
Loughboro soils have colors of lower chroma and a clayey subsoil and are on nearly level uplands.
Syenite soils are very bouldery and are on steeper upland side slopes. Moderately well drained. Runoff is medium. Permeability is moderate in the upper part and very slow in the fragipan. The majority of the area remains in native hardwood forest dominated by upland oaks.