The mean summer temperature is 59 to 63 degrees F. and the freeze-free period ranges from 110 to 175 days. These are the Anasazi , Aneth and Sogzie soils and the competing Moepitz soils. Anasazi soils have a calcic horizon and have a lithic contact at depths of 20 to 40 inches. Aneth soils do not have cambic horizons and have a sandy particle size control section. Sogzie soils have calcic horizons.
Potential vegetation is needleandthread, big sagebrush, blue grama, Indian ricegrass.
Begay soils are moderately extensive. These soils have been correlated to semidesert range sites in Utah. The Bk horizon is assumed to have too little carbonate to be a calcic horizon. In December 1994 the classification was changed from Ustollic Camborthids to Ustic Haplocambids.