Typically, they have a dark brown silt loam Ap horizon, and a red to dark red silty clay loam to silty clay thick argillic horizon. Pembroke silt loam - cultivated. The solum thickness and depth to bedrock ranges from 6O to more than 12O inches. Chert fragments range from O to 5 percent by volume in the upper half of the solum, and from O to 15 percent by volume in the upper half. Texture is silt loam or silty clay loam.
Structure is weak or moderate, fine or medium granular.
Some pedons have few or common brownish silt coats in the B22t and B23t horizons. These are the Baxter , Crider , and Cumberland series. Baxter soils have more than 35 percent clay and more than 15 percent chert in the B horizons. Crider soils have upper B horizons with hues yellower than 5YR, lack dark colored A horizons, and have a lithologic discontinuity at a depth of 2O to 4O inches. Some areas have karst topography.