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. Similar soils are the Axtell , Bremond , Chazos , Crockett , Crosstell , Kurten , Navo , Rader , Straber and Zulch soils. Lufkin soils have dominant chroma of 2 or less. Mabank, Axtell, Bremond, Crockett, Crosstell, Kurten, Navo, and Zulch series have epipedons less than 10 inches thick in more than 50 percent of the pedon.