All of the l re more than 40 inches deep to bedrock and all except Scorup and Monticello soil s have hUe of lOYR or yellower. Slopes are 2 to 10 percent. These soils formed in eolian deposits and in part in material weathered from. underlying sandstone. The mean annual summer temperatUre is 65 to 67xF., average annual precipitation is 13 to 17 inches. The frost-free season is 120 to 140 days.
Hovenweep soils lack argillic horizons, and overlie shale.
Montvale soils are less than 20 inches deep to bedrock. Some areas are used for rangeland. The native vegetation is dominantly Indian ricegrass, western wheatgrass, big sagebrush, pinyon and juniper. San Juan Area Utah, 1960.