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210 - Torriorthents, cool -Rock outcrop <br />210 - Torrionhents, cool -Rock outcrop, 35 to 90 percent <br />SETTING <br />Landforms: mountain, mesa, and ridge side slopes <br />Elevation: 6,000 to 5,000 feet <br />Mean annual air temperature: 46 to 50 degrees F <br />Mean annual precipitation: 12 to 16 inches <br />Frost free period: 90 to 120 days <br />CHARACTERISTICS OF THE TORRIORTHENTS, COOL SOIL <br />Parent material: residuum and colluvium from shale, sandstone, limestone or siltstone with basalt <br />overburden in some areas. <br />Dominant native plants: Indian ricegrass, western wheatgrass, prairie junegrass, scarlet Indian <br />paintbrush <br />Typical Profle <br />0 to 11 inches -light brownish gray clay loam <br />11 inches - Mancos shale bedrock <br />Depth class: shallow to very deep <br />Drainage class: well drained <br />Permeability: moderately slow <br />Available water capacity: very law to moderate <br />Potential rooting depth : 10 to 60 or more inches <br />Surface runoN: very rapid <br />Hazard of water erosion: high <br />Shrink-swell potential: moderate <br />Mass movement potential: moderate to high <br />CHARACTERISTICS OF THE ROCK OUTCROP <br />Rock outcrop consists of large exposures of shale parallel to the surface and as cliffs, breaks, or <br />escarpments. <br />COMPOSITION <br />Torriorthents, cool soil and similar soils: 55 percent <br />Rock outcrop: 35 percent <br />Contrasting inclusions: 10 percent <br />CONTRASTING INCLUSIONS <br />Ten percent Barx and Clapper soils on the lower part of the side slopes <br />• <br />• <br />• <br />Soils Description Report -West Elk Mine <br />December 1994 WESTEC 24 <br />