The Btg horizons, where present, have hue of 10YR, value of 5 to 7 and chroma of 1 or 2. Redoximorphic features in shades of red, brown or yellow range from few to many. Texture is mainly sandy clay loam or clay loam, but some pedons have clay texture. Reaction ranges form strongly acid to neutral. The BCtg horizon is in shades of gray or grayish brown with masses of iron accumulation in shades of red, yellow or brown.
Texture is sandy clay loam, loam or clay loam.
Reaction ranges from moderately acid to slightly alkaline. The C horizon, where present, is sandy clay loam, clay loam, or clay and typically contains thin strata of shale or weakly consolidated sandstone. Reaction ranges from medium acid to moderately alkaline. Gypsum crystals and calcium carbonate concretions are in the BC and C horizons of some pedons. These are the Lufkin and Mabank series.