Reaction is mildly alkaline or moderately alkaline. The Cr horizon has hue of either 10YR, 2.5Y, or 5Y, value of 7 to 8, and chroma of 1 to 3. It is weakly cemented siltstone or mudstone but crushes easily to silt loam, silty clay loam, or silty clay. Some pedons have interbedded tuffaceous sandstone or shaly clay. 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 , Durant , Foraker , and Tabler series in the same family and the similar Coy and Elmendorf 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.