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2.04.9 <br />roots commonly penetrate fractures in the rock. Surface runoff is rapid. <br />Surface stoniness helps to prevent water erosion. Mass wasting is common <br />in areas of this map unit. <br />The Rock outcrop part of this complex consists of more than 90 percent <br />exposed bedrock, principally sandstone. It provides cover for wildlife and is <br />used mainly for wildlife habitat and recreation. <br />The soils in this complex have only limited value for grazing and are used <br />mainly for wildlife habitat and recreation. Vegetative cover is needed to <br />control runoff and erosion. This map unit provides cover and escape for <br />wildlife. Deer commonly feed on the sunny slopes during winter. <br />Because of the surface stoniness and slope, the soils in this complex are <br />unsuited to crops and seedbed preparation and drilling of seed for pasture <br />plantings on depleted native range or in cleared areas are generally not <br />practical. A limited degree of success can be expected by broadcasting seed <br />late in summer or early in fall. Siberian wheatgrass, western wheatgrass, <br />Indian ricegrass, and crested wheatgrass are adapted species. Good <br />pasture management must be practiced to protect the soil from erosion and <br />to provide grazing for livestock. <br />76 — Torriorthents -Rock outcrop, shale complex. <br />This broadly defined map unit consists of moderately steep to very steep <br />soils and Rock outcrop on uplands, pediments, and side slopes of mesas. <br />Torriorthents make up about 55 percent of the map unit, and shallow rock <br />outcrops make up about 35 percent. Torriorthents are less sloping than the <br />rock outcrops and are near the base of the slope. The rock outcrops are <br />steeper than Torriorthents. Slopes are 15 to 70 percent. <br />Included with this unit in mapping are small areas of Badland and of Mesa, <br />Agua Fria, and Utaline soils. <br />Torriorthents are well drained. Depth to shale bedrock ranges from 10 to <br />more than 60 inches. The deeper areas are near the base of the slope. The <br />PR -14 2.04-110- 03/14 <br />