The bedrock is fine grained sandstone with horizontal cleavage. These are the Brimfield , Cleveland , Hollis , Holyoke , and Kearsarge series in the same family. Other closely related series in other families are Basehor , Boone , Hixton , Northfield , and Ramsey . Brimfield soils formed in till or residuum from micaceous schist. Cleveland soils contain granitic gravel in the solum and are underlain by granitic bedrock.
Hollis soils are underlain by bedrock dominantly composed of granite, schist, and gneiss.
Holyoke soils typically contain less sand in the solum and are underlain by basaltic bedrock. Kearsarge soils have less sand and underlain by phyllite. Basehor and Ramsey soils are siliceous. Boone soils have less than 5 percent weatherable minerals. Hixton and Northfield soils have argillic horizons.