SOIL PROFILE DESCRIPTIONS (con.) 



Unit 12. — Pachic CryoboroU (coarse loamy mixed) 



Parent Material: Gneiss, schist, migmatites 

 Slope: 35 percent, single, west-southwest aspect 

 Drainage: Well drained 

 Elevation: 7,950 ft. 



Landform: CoUuvial slope 

 Erosion: Moderate inherent erosion hazard 

 Vegetation: Aspen and shrub understory 

 with forbs and grasses 



Depth 



Horizon (inches) Description 



01 



1/2-0 



Thin layer of partially decomposed aspen leaves. 



All 



0-3 



Very dark grayish brown (lOYR 3/2) sandy loam; weak fine granular 

 structure; soft, friable; plentiful micro roots and few fine roots; very 

 few fine pores; neutral (pH 7.0); clear smooth boundary. 



A12 



3-12 



Dark grayish brown (lOYR 4/2) sandy loam; very dark grayish brown 

 (lOYR 3/2) moist; weak medium subangular blocky breaking to 

 moderate fine granular structure; slightly hard, friable; few fine and 

 plentiful medium and coarse roots; very few fine vesicular pores, 

 slightly acid (pH 7.0); clear wavy boundary. 







xsrown (^lUirt 4/oj graveuy neavy sanay loam, aarK urown (luirt 

 3/3) moist; moderate medium subangular blocky breaking to weak 

 fine subangular blocky structure; slightly hard, slightly firm, slightly 

 nlastic sliphtlv stickv few thin clav films in Dores and colloid stains on 

 mineral grains; few fine and coarse and plentiful medium roots; 

 plentiful micro and very fine pores; 15 percent gravel; slightly acid 

 (pH 6.5); clear wavy boundary. 



B23 



23-56 



Brown (7.5YR 5/2) cobbly sandy loam, dark brown (7.5YR 4/2) 

 moist; weak coarse subangular blocky structure; slightly hard, friable, 

 sUghtly sticky, slightly plastic; 15 percent cobble and gravel; slightly 

 acid (pH 6.5); gradual wavy boundary. 



C 



56-60 



Brown (7.5YR 5/2) cobbly loamy sand; massive; slightly acid (pH 6.5); 

 abrupt irregular boundary. 



R 



60+ 



Well weathered, slightly fractured parent material consisting of gneiss 

 and schistose rocks. 



30 



