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Soil Map Unit Description <br />112 — Cryorthents -Rock outcrop complex, 50 to 120 percent slopes, <br />extremely stony <br />Map Unit Setting <br />Elevation: 8,600 to 12,000 feet <br />Mean annual precipitation: 24 to 37 inches <br />Mean annual air temperature: 30 to 41 degrees F <br />Frost -free period: 40 to 70 days <br />Map Unit Composition <br />Cryorthents and similar soils: 50 percent <br />Rock outcrop: 40 percent <br />Description of Crvorthents <br />Setting <br />Landform: Mountain slopes, ridges <br />Landform position (two- dimensional): Summit <br />Landform position (three- dimensional): Mountaintop, interfluve <br />Down -slope shape: Convex <br />Across -slope shape: Convex <br />Parent material: Slope alluvium derived from tuff and /or colluvium derived from tuff <br />Properties and qualities <br />Slope: 50 to 120 percent <br />Depth to restrictive feature: 10 to 39 inches to lithic bedrock <br />Drainage class: Well drained <br />Capacity of the most limiting layer to transmit water (Ksat): Moderately low to <br />moderately high (0.06 to 0.20 in /hr) <br />Depth to water table: More than 80 inches <br />Frequency of flooding: None <br />Frequency of ponding: None <br />Available water capacity: Very low (about 0.6 inches) <br />Interpretive groups <br />Land capability (nonirrigated): 8e <br />Typical profile <br />0 to 4 inches: Extremely stony silt loam <br />4 to 12 inches: Extremely cobbly loam <br />12 to 22 inches: Unweathered bedrock <br />Description of Rock Outcrop <br />Setting <br />Landform: Mountain slopes, ridges <br />Landform position (two- dimensional): Summit <br />Landform position (three- dimensional): Free face, interfluve <br />Down -slope shape: Convex <br />Across -slope shape: Convex <br />Properties and qualities <br />Slope: 50 to 120 percent <br />Depth to restrictive feature: 0 inches to lithic bedrock <br />Capacity of the most limiting layer to transmit water (Ksat): Very low to moderately <br />low (0.00 to 0.06 in /hr) <br />Interpretive groups <br />Land capability (nonirrigated): 8s <br />Typical profile <br />0 to 60 inches: Unweathered bedrock <br />