About 85 percent of the mass is lime-coated rhyolitic tuff fragments. Depth to bedrock is 20 to 40 inches. The mollic epipdon ranges from 16 to 32 inches thick. The solum includes up to 20 percent rock fragments by volume, and ranges from medium acid to neutral. Between depths of 10 inches and the underlying bedrock, the soil contains between 18 and 27 percent clay and more than 15 percent fine sand or coarser, and averages 5 to 20 percent rock fragments.
Reaction is neutral or mildly alkaline.
The B2 horizon has value of 4 or 5 dry and 2 or 3 moist, and chroma of 2 or 3 moist and dry. Clay increases over the A horizon ranges from 0 to 2.5 percent. This horizon is commonly silt loam but ranges to loam. Weak or moderate bleacbed silty coatings and weak organic stains are present on the peds in some pedons. Reaction is neutral or mildly alkaline.