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MAPPING UNIT 3F - RHONE LOAM <br />• 30 TO 70 PERCENT SLOPES <br />This deep, well-drained soil is on mountain slopes and ridges <br />ranging in elevation from 7600 to 8600 feet. It formed in residuum <br />from sandstone and marlstone. The average annual precipitation <br />is about 20 inches, the average annual air temperature is about <br />40 degrees F., and average frost-free period is less than 75 days. <br />The deep, well-drained Rhone soil is formed in material weathered <br />from hard, fine-grained sandstone. Typically, the surface layer <br />is brown loam about 8 inches thick with underlying material of <br />brown channery sandy clay loam about 24 inches thick. Weathered <br />sandstone and marlstone underlie the soil at a depth of 40 to <br />50 inches. The reaction throughout the profile is neutral. <br />The Rhone soil has a moderate permeability, an effective rooting <br />• depth of 30 to 40 inches and a medium to high available water <br />capacity. The surface runoff is slow with a slight erosion hazard. <br />It has a capability subclass Vlie. <br />FICATION OF MAJOR COMPONENTS <br />Rhone loam, 30 to 70 percent slopes; Family Loamy-skeletal, Mixed <br />Cumulic Cryoborolls. <br />INCLUSIONS <br />Included with this soil mapping unit are small areas of Parachute <br />and Northwater soils which make up 10 to 15 percent of the mapping <br />unit. Parachute soil is found in areas of shallow soil development. <br />Northwater soil is found on north facing slopes. <br />C, <br />J <br />I-6 <br />