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ti <br />23a-Owen Creek shallow Variant sandy loam, 0 to 9 percent slopes. <br />This shallow well drained soil is on broad flat ridgetops. It formed <br />in residuum from interbedded shale and sandstone. Slopes are plane <br />to slightly convex. Areas are irregular in shape and are 1 .to 82 acres <br />in size. The vegetation is mainly shrubs, (orbs and grasses. Elevation <br />ranges from 7350 to 7500 feet. The average annual precipitation is <br />about 15 to 16 inches and the mean annual air temperature is about <br />41°F. <br />Typically the surface layer is brown clay loam about 4 inches <br />[hick. The subsoil is dark brown clay about 9 inches thick. The <br />substratum is reddish brown clay about 6 inches thick which is <br />. underlain by a paralithic contact of shale at a depth of 19 inches. <br />The soil is calcareous below a depth of 13 inches. <br />Included in mapping are about 10 percent Lymanson soils which <br />occur in the more concave portions of the topography and further from <br />the ridgetops. Also included are about 5 percent Splitro soils and <br />about 5 percent soils similar in all other respects to Owen Creek <br />shallow Variant except that they are coarser textured. <br />Permeability of this soil is moderately slow to slow. Effective <br />rooting depth is 19 inches. Available water capacity is moderate to <br />low. Surface runoff is medium and hazard of erosion by both water <br />and wind is slight. <br />This map unit is used for grazing, wildlife habitat and watershed. <br />The soils of this mapping unit provide a fair to poor source of <br />. topsoil to an average depth of 9 inches. Below [hie depth the soil <br />textures become too clayey to be acceptable as topdressing material. <br />2-2A8 <br />