SOIL PROFILE DESCRIPTIONS (con.) 



Unit 11. — Pachic Cryoboroll (loamy skeletal mixed) 



Parent Material: Granite, gneiss, slate, schist 

 Slope: 26 percent, single, west-southwest aspect 

 Drainage: Well drained 

 Elevation: 8,000 ft. 



Landform: Colluvial sideslope 



Erosion: Slight sheet 



Vegetation: Big sagebrush, rabbitbrush, 

 ceanothus, lupine, Indian paintbrush, 

 bushweed, yarrow, cheatgrass, and 

 wheatgrass 



Depth 



Horizon (inches) 



Description 



Al 



ASorBl 3-9 



11B21 9-16 



llB22t 16-26 



llCl 26-35 



R 



0-3 Dark grayish brown (lOYR 4/2) sandy loam, very dark brown (lOYR 



2/2) moist aggregate; very weak medium subangular blocky breaking 

 to moderate fine granular structure; soft, friable, nonsticky, nonplastic, 

 plentiful fine and few micro roots; 10 percent gravel; neutral (pH 7.0); 

 clear smooth boundary. 



Dark grayish brown (lOYR 4/2) gravelly sandy loam, dark brown 

 (lOYR 3/3) moist aggregate; very weak medium subangular blocky 

 breaking to moderate fine granular structure; soft, very friable, slightly 

 sticky, slightly plastic; plentiful fine and few medium and micro roots; 

 15 percent gravel; neutral (pH 7.0); clear wavy boundary. 



Dark brown to brown (lOYR 4/3) cobbly sandy loam marginal to 

 sandy clay loam, dark brown (lOYR 3/3) moist aggregate; moderate 

 fine subangular blocky breaking to weak very fine granular structure; 

 slightly hard, friable, slightly sticky, slightly plastic; few thin clay 

 films on ped faces and colloid stains on mineral grains; plentiful 

 medium and few fine and coarse roots; 20 percent gravel and 25 

 percent cobble; neutral (pH 7.0); abrupt irregular boundary. 



Strong brown (7. SYR 5/6) very stony clay loam, dark brown (7.5YR 

 4/4) moist; moderate fine subangular blocky structure; slightly hard, 

 friable, slightly sticky, plastic, few thin clay films on ped faces; 

 plentiful fine and medium roots; 65 percent angular stone and cobble; 

 neutral (pH 7.0); abrupt irregular boundary. 



Brown (7.5YR 5/4) very stony sandy loam, dark brown to brown 

 (7.5YR 4/4) moist; moderate very fine granular structure; slightly 

 hard, very friable; few fine and medium roots; 80 percent stone and 

 cobble; neutral (pH 7.0); abrupt irregular boundary. 



35-44 Well weathered, well fractured migmatite (composite gneiss, soft, can 



be cut with knife; no roots. 



29 



