Some pedons have BA horizons. The Bt1 horizon has hue of 10YR or 7.5YR, value of 4, and chroma of 3 or 4. Texture is clay loam or silty clay loam. Reaction is slightly acid or neutral. The Bt2 horizon has hue of 7.5YR or 10YR, value of 3 to 5, and chroma of 3 or 4.
Texture is gravelly clay loam, clay loam, sandy clay loam, or gravelly loam.
Reaction is slightly acid to neutral. The Bt3 horizon has hue of 5YR or 7.5YR, value of 3 or 4, and chroma of 2 to 4. Texture is the gravelly or very gravelly analogues of loam, clay loam or sandy clay loam. Reaction is neutral or slightly alkaline. Tongues of the Bt3 horizon extend from 6 to 25 inches into the underlying gravel and coarse sand and range in distance apart from 12 to more than 36 inches.