The top of the argillic horizon is 15 to 40 inches below the surface. Depth to bedrock is greater than 60 inches. Rock fragments are primarily siliceous siltstone and chert but with some angular fine-grained sandstone in the lower horizons. They range from 40 to 80 percent by volume in individual horizons of the soil and averages more than 50 percent in the top 20 inches of the Bt horizon. Some pedons have rock fragments of cherty siltstone.
Reaction ranges from extremely acid through strongly acid where unlimed.
The Ap horizon has hue of 10YR, value of 3 through 5, and chroma of 2 or 3. Undisturbed pedons have an A horizon with hue of 10YR, value of 2 or 3, and chroma of 1 or 2. Texture is loam, sandy loam, or silt loam in the fine-earth fraction. Some pedons have E horizons with hue of 7.5YR or 10YR, value of 6 or 7, and chroma of 2 to 4. Texture is loam, fine sandy loam, or sandy loam.