The Bt horizon has moderate to strong subangular blocky or blocky structure or prismatic structure parting to blocky and subangular blocky. The Bx horizon has medium to very coarse moderate to strong prismatic structure parting to weak to moderate blocky and subangular block structure. Texture is silty clay loam or silt loam in the fine-earth fraction. Some pedons have BA and BC horizons. The C horizon has hue of 5Y through 2.5YR, value of 4 through 7, and chroma of 1 through 6.
Texture ranges from silt loam to clay.
Some pedons have gray to strong brown mottles. These are the Brinkerton , Calvert , Croton , Doylestown , Ginat , Robertsville , and Sheffield series. Brinkerton soils formed in acid siltstone and shale materials. Calvert and Croton soils have thinner sola and bedrock at depths of 36 to 60 inches. Doylestown soils have B horizons which have less clay and sand and more silt and rock fragments than the Thorndale soils.