The mean annual soil temperature ranges from about 47 to 52 degrees F. EC is less than 2 mmhos throughout. The surface may be covered with a gravel or channery lag from colluvial action upslope. Reaction ranges from mildly through strongly alkaline. Calcium carbonate ranges from 1 to 5 percent with no continuous horizons of visible secondary accumulation. A thin Bw horizon may be present in some pedons.
Reaction ranges from mildly alkaline through strongly alkaline.
The Cr horizon consists of soft, calcareous sandstone interbedded with thin lenses of siltstone and shale. Thin, discontinuous lenses of hard sandstone occur in some pedons. This material is many 10's of feet thick in most areas. These are the Birdsley , Celeton , Persayo , Roic , and Shalet series. Birdsley and Persayo soils have more than 18 percent clay in the particle size control section.