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• The Tiagos series is a member of the coarse loamy, mixed <br />family of Argic Cryoborolls. Tiagos soil in the area of Pit 2 <br />has a brown to dark brown, loam, slightly hard, moderate coarse <br />granualr A horizon. The argilic B horizon is a brown loam, hard, <br />moderate coarse angular blocky structure. The C horizon is a <br />yellowish brown sandy clay loam, extremely hard, strong very coarse <br />angular blocky structure. <br />The Tiagos series are formed in noncalcareous alluvium. They <br />are well drained soils. Surface textures for the representative <br />(SCS) profile are fine sandy loams. The type location in Pit 2 <br />has a surface texture of loam. <br />Typifying pedon, Tiagos loam: <br />Al (0-12") - Brown to dark brown (lOYR 4/3) loam, very dark <br />grayish brown (lOYR 3/2) moist; moderate, coarse granular <br />structure; slightly hard, friable, slightly sticky; many <br />fine and medium roots; slightly acid (ph 6.5); gradual <br />wavy boundary. <br />• B2 (12-32") - Brown (lOYR 5/3) loam, dark brown (lOYR 3/3) <br />moist; moderate, coarse, subangular blocky structure; <br />hard, firm, nonsticky; many fine and medium roots; slightly <br />acid (pH 6.4); gradual wavy boundary. <br />B2t (32-52") - Brown to dark brown (lOYR 4/3) loam, dark brown <br />(lOYR 3/3) moist; moderate, coarse, subangular blocky <br />structure; hard, firm, slightly sticky; few fine roots; <br />clay films on peds; slightly acid (pH 6.4); gradual wavy <br />boundary. <br />C (52-60") - Yellowish brown (lOYR 5/6) sandy clay loam, dark <br />yellowish brown (lOYR 4/6) moist; strong, very coarse, <br />angular blocky structures; extremely hard, very firm, <br />very sticky; neutral (pH 6.6). <br />Range in Characteristics: The profile is 0 to 35 percent <br />coarse fragments. Reaction ranges from slightly acid to mildly <br />alkaline. <br />• <br />-14- <br />