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Map Unit Description: Cryoboralfs -Rock outcrop complex, 35 to 75 percent <br />slopes -Rio Grande NF Area. Colorado, West Part, Parts of Archuleta, Conejos, <br />Hinsdale. Mineral. Rio Grande, Saguache, and San Juan Counties <br />Rio Grande NF Area, Colorado, West Part, Parts of <br />Archuleta, Conejos, Hinsdale, Mineral, Rio Grande, <br />Saguache, and San Juan Counties <br />125 - Cryoboralfs -Rock outcrop complex, 35 to 75 percent <br />slopes <br />Map Unit Setting <br />Elevation: 8,600 to 11,600 feet <br />Mean annual precipitation: 16 to 30 inches <br />Mean annual air temperature: 35 to 37 degrees F <br />Frost -free period: 30 to 60 days <br />Map Unit Composition <br />Cryoboralfs and similar soils: 55 percent <br />Rock outcrop: 30 percent <br />Minor components: 15 percent <br />Description of Cryoboralfs <br />Setting <br />Landform: Mountains <br />Landform position (three - dimensional): Mountainflank <br />Down -s lope shape: Linear <br />Across -slope shape: Linear <br />Parent material: Residuum weathered from mixed and/or colluvium <br />derived from mixed <br />Properties and qualities <br />Slope.' 35 to 75 percent <br />Surface area covered with cobbles, stones or boulders: 1.0 percent <br />Depth to restrictive feature: 10 to 80 inches to lithic bedrock <br />Drainage class: Well drained <br />Capacity of the most limiting layer to transmit water <br />(Ksat): Moderately low to 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 pending: None <br />Maximum salinity: Nonsaline (0.0 to 1.0 mmhos/cm) <br />Available water capacity: Low (about 5.9 inches) <br />Interpretive groups <br />Land capability (nonirrigated): 7s <br />Other vegetative classification: Subalpine fir - Engelmann spruce) <br />common juniper (ABLA- PIEN/JUC06) (CO309) <br />Typical profile <br />0 to 2 inches: Moderately decomposed plant material <br />2 to 6 inches: Stony silt loam <br />6 to 9 inches: Stony Gay loam <br />9 to 18 inches: Very stony silty clay loam <br />18 to 62 inches: Very stony clay <br />Description of Rock Outcrop <br />Properties and qualities <br />Slope: 35 to 75 <br />percent <br />Depth to restrictive feature: 0 inches to tithic bedrock <br />