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SEP-16-2003 11:15 FROM: Otlicial Series Description - ALLIrNS YAKK Series LOCATION ALLENS PAAK CO Established Series Rev. GB/LN 04!2001 ALLENS PARK SERIES T0: 13038328106 P.9~13 Yage 1 oI s The Aliens Park series consists of moderately deep, well drained, moderately permeable soils that formed in parent sediments weathered in place from underlying granitic or sandstone bedrock. Aliens Park soils are on mountain slopes, hills, and ridges. Slopes range from 5 to 50 percent. The mean annual precipitation is about 18 inches and mean annual temperature is 42 degrees F. TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Typic Haplustalfs TYPICAL PEDON: Aliens Park coarse sandy loam, woodland. (Colors are for dry soil unless otherwise noted.) Oi--O to 2 inches; slightly decomposed organic material, chiefly bazk, twigs, needles, and the remains of understory plants. Oe--2 to 4 inches; partially decomposed organic material like that of the above horizon. A-4 to 6 inches; dark gray (lOYR 4/1) coazse sandy loam, very dark gray (lOYR 3/1) moist; moderate fine granular structure; soft, very friable; 5 percent pebbles; much medium to coarse angulaz granite sand; neutral (pH 6.8); gradual smooth boundary. (0 to 4 inches thick) E--6 to 14 inches; light brownish gray (1 OYR 6/2) coarse sandy loam, grayish brown (lOYR 5/2) moist; weak medium platy structure parting to moderate fine granules; soft, very friable; vesiculaz; 10 percent fine granite pebbles; much medium and coarse angular granite sand; neutral (pH 6.6); gradual wavy boundary. (5 to 12 inches thick) B/E--14 to 21 inches; mixed colors of light brownish gray (IOYR 6/2) and brown (lOYR 5/3) coarse sandy loam matrix containing nodules and seams of sandy clay loam, grayish brown (1 OYR 5/2) moist and dark brown (IOYR 413) moist; weak medium subangulaz blocky structure parting to moderate fine granules; very hard, very friable; common thin glossy patches on surfaces of clayey peds; 10 percent fine granite pebbles; much medium and coarse angular granite sand; slightly acid (pH 6.4); gradual wavy boundary. (5 to 10 inches thick) Bt--21 to 30 inches; brown (IOYR 5/3) coarse sandy clay loam, dark brown (lOYR 4/3) moist; moderate medium subangulaz blocky structure; extremely hard, friable; thin continuous wax-like coatings on faces of peds; waz-like coatings and fillings in pores and root channels; 10 percent fine angular granite pebbles; slightly acid (pH 6.4); gradual wavy boundary. (8 to 30 inches thick) R-30 inches; granite bedrock. TYPE LOCATION: Boulder County, Colorado; NWl/4 NEl/4 Sec. 35, T. 2 N., R. 71 W. httn•//nrth~ fiw nm.c ucda.onv/osd/dat/A/AT.GFNS PARK.html 09/10/2003