Depth to a paralithic contact of fractured and weathered andesitic rock is 20 to 40 inches. The mean annual soil temperature is about 51 degrees to 57 degrees F., and usually is below 41 degrees F., from December 15 to March 15. The soil between depths of 4 and 12 inches is usually dry in all parts from July 15 until October 15 and is moist in some or all parts all the rest of the year. It is moist in all parts from December 15 to April 15. Rock fragments make up 5 to 30 percent of the soil.
Fragments are both angular and rounded and are mostly pebbles with a few cobbles and stones.
The soil is slightly acid to mildly alkaline. In some pedons, the lower B horizon is slightly or strongly effervescent. The soil has cracks 1 to 2 cm wide from the surface to a depth of 20 inches or more when dry in the summer. Very few nonintersecting slickensides are in some pedons. There is little or no mixing or churning of the horizons.