The C horizon has hue of 10YR, 2.5Y, or 5Y, value of 7 to 8, and chroma of 1 to 3. It is weakly cemented siltstone or mudstone. In some pedons the material crushes to silt loam, silty clay loam, or silty clay texture. Some pedons have interbedded tuffaceous sandstone or shale that has clay texture. Some crack faces contain thin coatings of calcium carbonate.
Dark concretions range from none to common.
Some pedons contain thin strata and fracture coatings of sand. These are the Benchley series in the same family and the similar Coy , Durant , Elmendorf , Foraker and Tabor series. Benchley soils lack Cr horizons, Durant, Foraker, and Tabler soils have lower mean annual soil temperatures and shorter growing seasons. These soils are formed in sediments that do not contain tuffaceous materials and are assumed to have significant physical and chemical differences that are not totally understood at this time. Flatonia soils are on gently sloping uplands.