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• This map un it is in capability subclass VIe. It is the Mountain Loam range site. X8F--Dunckley-Skyway, dry complex, 25 to 65 percent slopes. This map unit is on mountain side slopes. Elevation is 7,200 to 8,500 feet. The average annual precipitation is 18 to 25 inches, the average annual air temp- erature is 37 to 40 degrees F, and the average frost-free period is 40 to 65 days. This unit is 45 percent Dunckley soil, 40 percent Skyway soil. Included in this unit are small areas of Skylick soils and Splitro soils. The Dunckley soil is deep and well drained. It formed in colluvium derived dominantly from sandstone. Typically, the surface is covered with a mat of partially decomposed and decomposed leaves and twigs about 3 inches thick. Typically, the surface layer is dark brown loam about 10 inches thick. The subsurface layer is very pale brown gravelly loam and very gravelly loam • about 19 inches thick. The upper 10 inches of the subsoil is yellowish brown very gravelly clay loam, the next 21 inches is yellowish brown very cobbly clay loam and the lower part to a depth of 70 inches is brownish yellow extremely stony loam. Permeability of the Cunckley soil is moderate. Available water capacity is moderate. Runoff is medium, and the hazard of water erosion is high. The Skyway soil is moderately deep and well drained. It formed in residuum derived dominantly from sandstone. Typically, the surface is covered with a mat of partially decomposed leaves and twigs about 1 inch thick. The surface layer is very dark grayish brown sandy loam about 15 inches thick. The upper 10 inches of the underlying material is grayish brown sandy loam. The lower part to a depth of 30 inches is very pale brown loamy fine sand. Consolidated sandstone is at a depth of 30 inches. Permeability of the Skyway soil is moderately rapid. Available water capacity is low. Runoff is medium and the hazard of water erosion is high. • Ex. 16-16