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36a--Roxal Variant-Starman complex, 0 to 9 percent slopes. This <br />~~ map unit is on ridgetops and sides lopes. Slopes are plane and aspect is <br />generally northwest. Areas are irregular in shape and are 1 to 2 acres <br />Sn size. The vegetation is mainly shrubs, fortis and grasses. Elevation <br />ranges from 7,400 to 7,425 feet. The average annual precipitation is <br />about 14 inches and the mean annual air temperature is about 42°F. <br />Roxal Variant sandy loam is about 45 percent of the map unit and <br />Starman fine sandy loam is about 35 percent. The Roxal Variant soils <br />occur in the more concave portions of the topography and on the broad <br />gently sloping ridgetops. Starman soils occur on the steeper sides lopes <br />and in convex portions of the topography. Inclusions of Splitro, Owen <br />Creek shallow Variant and Winevada soils comprise the remaining 20 per- <br />cent. <br />The Roxal Variant soil is moderately deep and well drained. It <br />formed in residuum from interbedded sandstone and shale. Typically the <br />surface layer is brown sandy loam and sandy clay loam about 12 inches <br />thick. The substratum which is lithologically discontinuous is light <br />olive brown clay Loam about 19 inches thick which is underlain by a par- <br />alithic contact of weathered shale at a depth of 31 inches. <br />Permeability of the Roxal Variant soil is moderate as is available <br />water capacity. Effective rooting depth is 31 inches. Runoff is medium <br />and hazard of erosion by water is slight and moderate by wind. <br />The Starman soil is shallow and somewhat excessively drained. It <br />formed in residuum from interbedded sandstone and shale. Typically <br /> <br />2-314 <br />