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99e--Cryoborolls-Rock outcrop complex steep. This map unit is on <br />upland sideslopes. Slopes are plane to slightly convex. Areas are <br />irregular in shape and are 6 to 29 acres in size. The vegetation is <br />mainly shrubs, forbs and grasses. Elevation ranges from 7240 to 7625 <br />feet. The average annual precipitation is about 14 inches and the mean <br />annual air temperature is about 42°F. <br />This complex is about 55 percent Torriorthents and about 35 percent <br />Rock outcrop. The Rock outcrop occurs mainly as exposed bedding planes <br />throughout the map unit. <br />The Cryoborolls map unit consists of shallow to deep, somewhat <br />excessively to well drained soils, They formed in 'residum and <br />colluvium derived from thinly interbedded layers of sandstone and shale. <br />• The surface of the Cryoboroll soil described is brown sandy loam about <br />13 inches thick. The substratum is light yellowish brown sandy clay <br />loam about 15 inches thick. A paralithic contact of soft interbedded <br />sandstone and shale occurs at a depth of 18 inches. <br />Permeability of this soil is moderate. Available water capacity <br />is low to moderate. Effective rooting depth is 18 inches. Runoff <br />is rapid and hazard of erosion by water is slight to moderate. The <br />hazard of wind erosion is moderate. <br />This unit is used for wildlife habitat and watershed. <br />The soil of this map unit provides a fair source of topsoil to <br />an average depth of 13 inches aad a poor to unuseable source below <br />this depth. High content of coarse fragments, many rock outcrops <br />throughout the unit, and steep slopes are the main Limitations. <br />2-325 <br />