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229 -Cryochrepts -Cryoborolls -Rubble land complex <br />Hazard of water erosion: high <br />Shrink-swell potential: low <br />• Mass movement potential: moderate <br />CHARACTERISTICS OF THE RU88LE LAND <br />Rubble land consists of large exposures of loose rocks such as talus, scree, or rock glaciers derived <br />dominantly from rhyolite, andesite, breccia, or basalt. <br />COMPOSITION <br />Cryochrepts soil and similar soils: 35 percent <br />Cryoborolls soil and similar soils: 30 percent <br />Rubble land: 25 percent <br />Contrasting inclusions: 10 percent <br />CONTRASTING INCLUSIONS <br />Five percent soils with less than 35 percent rock fragments in the particle size control section <br />Five percent rock outcrop <br />MAJOR USES <br />• Wildlife, recreation <br />MAJOR MANAGEMENT FACTORS <br />Recreation <br />Cryochreots and Cryoborolls <br />Soil-related factors: steep slopes in some areas, high soil erosion hazard in the steeper areas, <br />subsurface rock fragments, moderate mass movement potential <br />Management considerations: <br />The steepness of slope limit the uses of this unit to wildlife habitat, limited recreation, watershed, <br />and scenic beauty. <br />Any construction activity on this unit may trigger mass movement. <br />Steep slopes limit the use of this unit to a few paths and trails, which should extend across the <br />slope. <br />n <br />LJ <br />Soils Dpeription Report -West Elk Mine <br />December 1994 WESTEC 49 <br />