Some pedons have BC horizons that are loamy sand or loamy coarse sand. It is coarse sand, loamy sand, or coarse sand, including gravelly or very gravelly analogs of these textures. Total sand content averages more than 85 percent and coarse plus very coarse sand is more than 10 percent. Rock fragments average 10 to 50 percent pebbles. Cobbles range from 0 to 5 percent.
Reaction ranges from slightly alkaline or moderately alkaline.
Calcium carbonate equivalent ranges from 0 to 30 percent. These are the Backbone , Billett , Desker , Kingsley , Oronoco , Pardeeville , Renwick , and Ulster series. Backbone soils have a lithic contact within a depth of 60 inches. Billett and Renwick soils average less than 10 percent coarse plus very coarse sand in the lower part of the control section. Desker soils are less than 40 inches to the base of the argillic horizon.