The C horizon has hue of 10YR or 2.5Y, value of 4 or 5, and chroma of 2 or 3. Some pedons contain a few brownish or yellowish mottles in the C horizon. The C horizon is silty clay loam, clay loam, or silt loam. Some pedons contain strata of coarser or finer texture than the control section. The C horizon is neutral through moderately alkaline.
Stratification ranges from very slight to distinct.
These are the Bergstrom , Bigetty , Iraan and Port of the same family and the similar Asa , Bosque , Frio , Gageby , Gowen , Spur , Velow and Whitesboro series. The Bergstrom soils are calcareous throughout. The Bigetty and Irran soils occur in arid to semiarid moisture regimes. The Port soils have hues of 7.5YR or redder throughout. The Asa, Spur and Velow soils have mollic epipedons less than 20 inches thick.