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<br />42b-Borollic Camborthids, coarse-loamy, mixed, 10 to 29 percent slopes. <br />This deep well drained soil occurs on river terraces. It formed in <br />alluvium derived from sandstone and shale with a component of gravelly <br />outwash. Slopes are plane to concave. The unit is elongate in shape <br />and is 5 acres in size. The vegetation is mainly shrubs. Elevation <br />ranges from 6325 to 6330 feet. The average annual precipitation <br />is about 14 inches and the mean annual air temperature is about 42°F. <br />Typically the surface is yellowish brown fine sandy loam about <br />13 inches thick. The subsoil is yellowish brown clay Loam about 4 <br />inches thick. The substratum is composed of two layers which are <br />lithologically discontinuous. The upper of these two is light <br />yellowish brown clay loam about 10 inches thick and the lower is very <br />pale brown sand extending to a depth of greater than 60 inches. The <br />soil is calcareous throughout. <br />Included in mapping is about 10 percent Forelle soils and about <br />S percent soils similar in all respects to the Borollic Camborthids <br />except that they have clayey textures. <br />Permeability of this soil is moderate to 27 inches and rapid below <br />this depth. Available water capacity is moderate in the rooting zone <br />above 27 inches but low below this depth. Effective rooting depth <br />is greater than 60 inches. Runoff is medium and hazard of erosion <br />by water is slight to moderate. Hazard of wind erosion is moderate. <br />This unit is used for wildlife and watershed. <br />-- <br />r 2-321 <br />- - - - -' - y,,r~- a .T.' ~~ ~- -'-.ti.. - <br />