SOIL PROFILE DESCRIPTIONS (con.) 

 Unit 18. — Aquic Argic Cryoboroll (fine mixed) 



Parent Material: Gneiss and shale 

 Slope: 25 percent 



Drainage: Poorly to somewhat poorly drained 

 Elevation: 8,000 ft. 



Landform: Landflows 



Erosion: None apparent 



Vegetation: Aspen, snowberry, gooseberry 



Horizon 



Depth 

 (inches) 



Description 



All 



A12 



0-1 



1-11 



B21t 



11-15 



B22t 



15-18 



llB21tg 18-25 



llB22tg 25-47 + 



Dark brown to brown (lOYR 4/3) loam, dark brown (lOYR 3/3) 

 moist; weak fine piaty breaking to moderate very fine granular 

 structure; slightly hard, friable; plentiful fine and micro roots; few 

 micro and very fine interstitial pores; neutral; abrupt smooth boundary. 



Brown (lOYR 5/3) heavy loam, dark brown (lOYR 4/3) moist; 

 moderate medium subangular blocky breaking to moderate medium 

 granular structure; slightly hard, friable, slightly sticky, slightly 

 plastic; plentiful fine and few micro and medium roots; common very 

 fine interstitial pores; neutral; clear smooth boundary. 



Light brown (7.5YR 6/4) sandy clay, dark brown to brown (7.5YR 

 4/4) moist; strong medium subangular blocky structure; hard, firm, 

 sticky, plastic; common moderately thick clay films on ped faces, in 

 pores, and as bridging; plentiful medium and coarse and few fine roots; 

 common very fine pores; slightly acid (pH 6.5); clear boundary. 



Light brown (7.5YR 6/4) gravelly clay, brown (7. SYR 5/4) moist; 

 strong coarse subangular blocky structure; hard, firm, sticky, plastic; 

 many moderately thick to thick clay films on ped faces and as 

 bridging; plentiful medium and coarse and few fine roots; 20 percent 

 gravel; slightly acid (pH 6.4); abrupt irregular boundary. 



Yellowish brown (lOYR 5/6) gravelly clay, brown (lOYR 4/3) moist; 

 strong coarse angular blocky structure; very hard, very firm, sticky, 

 plastic; common medium distinct very dark grayish brown (lOYR 3/2) 

 and grayish brown (2.5Y 5/2) mottles; common moderately thick 

 clay films on ped faces; few coarse and fine and plentiful medium 

 roots; 25 percent gravel; slightly acid (pH 6.5); gradual wavy boundary. 



Yellowish brown (lOYR 5/6) stony clay; strong coarse angular blocky 

 structure; common medium distinct olive gray, olive and grayish 

 brown mottles; common moderately thick clay films on ped faces; 

 plentiful medium and few fine roots; 40 percent stone and gravel; 

 sHghtly acid (pH 6.4). 



34 



