The Bt horizon has hue of 10YR or 7.5YR, value of 3 to 5, and chroma of 3 to 6. Texture is silt loam or silty clay loam. Reaction ranges from very strongly acid to moderately acid. The 2Bt horizons have hue of 10YR, 7.5YR, or 5YR, value of 3 to 5, and chroma of 3 to 6. Texture is clay, clay loam, sandy clay loam, or loam in the fine earth fraction.
Reaction ranges from moderately acid to slightly alkaline.
The 3BC or 3Bt horizon have hues of 10YR, value of 4 or 5, and chroma of 3 to 6. Textures are loam or clay loam. Reaction ranges from neutral to moderately alkaline and is partially leached of carbonates. The 3C horizon has hue of 10YR, value of 4 or 5, and chroma of 3 to 6. Textures are loam or clay loam.