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Map Unit Description <br />San Miguel Area, Colorado, Parts of Dolores, Montrose, and San Miguel Counties <br />88 Rock outcrop-Orthents complex, 40 to 90 percent slopes <br />Setting <br />Elevation: 4700 to 9200 feet <br />Mean annual precipitation: 10 to 19 inches <br />Mean annual air temperature: 43 to 49 degrees F <br />Frost-free period: 70 to 140 days <br />Composition <br />Rock outcrop: 50 percent <br />Orthents and similar soils: 45 percent <br />Description of Rock outcrop <br />Setting <br />Landform: Canyons, mesas, structural benches <br />Down-slope shape: Linear <br />Across-slope shape: Linear <br />Parent matedal: Residuum weathered from sandstone <br />Properties and qualities <br />Slope: 40 to 90 percent <br />Depth to restrictive feature: 0 to 4 inches to Lithic bedrock <br />Capacity of the most limiting layer to transmit water (Ksat): Very low or low (0.00 to 0.00 in/hr) <br />Frequency of flooding: None <br />Frequency o5 ponding: None <br />Interpretive Groups <br />Land capability (non irrigated): 8s <br />Typical Profile <br />0 to 60 inches: unweathered bedrock <br />Description of Orthents <br />Setting <br />Landform: Structural benches, canyons, mesas <br />Down-slope shape: Linear <br />Across-slope shape: Linear <br />Parent material: Colluvium and residuum from sandstone and shale <br />Properties and qualities <br />Slope: 40 to 90 percent <br />Depth to restrictive feature: 10 to 80 inches to Paralithic bedrock <br />Drainage class: Well drained <br />Capacity of the most limiting layer to transmit water (Ksat): Moderately high or high (0.20 to 1.98 in/hr) <br />Frequency of flooding: None <br />Frequency of ponding: None <br />Calcium carbonate maximum: 40 percent <br />Gypsum maximum: 0 percent <br />Available water capacity: Moderate (about 6.2 inches) <br />Interpretive Groups <br />Land capability (non irrigated): 8e <br />Other vegetative classification: Douglas-flr (null_5) <br />Typical Profile <br />0 to 1 inches: stony loam <br />1 to 14 inches: gravelly loam <br />1410 24 inches: very cobbly loam <br />24 to 60 inches: very cobbly loam <br />UCJ~f~ Natural Resources <br />CODSerVatlOtt SerYlCe Tabular Data Version: 4 <br />Tabular Data Version Date: 01/10/2007 <br />Page I-10 <br />