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Official Series Description-&CAJO Series Page 1 of 2 <br /> ' LOCATION CASCAJO CO+NM <br /> Established Series <br /> RJUGB <br /> 07/97 <br /> CASCAJO SERIES <br /> The Cascajo series consists of deep, excessively drained soils that formed in very gravelly and sandy <br /> alluvium over shale or sandstone at depths of 4 to 20 feet. Cascajo soils are on terraces,terrace edges <br /> ' and ridges and have slopes of 2 to 40 percent. The mean annual precipitation is about 12 inches and <br /> the mean annual temperature is about 52 degrees F. <br /> TAXONOMIC CLASS: Sandy-skeletal, mixed, mesic Ustic Haplocalcids <br /> TYPICAL PEDON: Cascajo very gravelly sandy loam, grassland. (Colors are for dry soil unless <br /> otherwise noted.) <br /> A-0 to 6 inches; light brown(7.5YR 6/4)very gravelly sandy loam, dark brown(7.5YR 4/4) moist; <br /> ' moderate medium granular structure; slightly hard, very friable; common very fine roots;40 percent <br /> pebbles, 15 percent cobbles; weakly calcareous; moderately alkaline; clear wavy boundary. (2 to 6 <br /> inches thick) <br /> AC-6 to 10 inches; light brown(7.5YR 6/4)very gravelly sandy loam, dark brown(7.5YR 4/4) <br /> moist;weak medium subangular blocky structure; slightly hard, very friable; common very fine <br /> ' roots; 40 percent pebbles, 10 percent cobble; slightly calcareous; moderately alkaline; clear irregular <br /> boundary. (0 to 8 inches thick) <br /> ' Ck-10 to 21 inches; very pale brown(10YR 8/3)very gravelly sandy loam,pale brown(10YR 6/3) <br /> moist; weak medium subangular blocky structure; slightly hard, loose; few very fine roots; 40 <br /> percent pebbles, 5 percent cobbles; strongly calcareous and thick time coatings on pebbles and <br /> cobbles; moderately alkaline; clear wavy boundary. (10 to 24 inches thick) <br /> C-21 to 48 inches; very pale brown(10YR 7/3)stratified very gravelly loamy coarse sand and very <br /> gravelly sand, brown (10YR 513) moist; single grain; loose; 40 percent pebbles, 15 percent cobbles; <br /> strongly calcareous; moderately alkaline. <br /> ' TYPE LOCATION: Pueblo County,Colorado; northwest 1/4 of southeast 1/4 of Sec. 15, T. 21 S., <br /> R. 64 W. <br /> ' RANGE IN CHARACTERISTICS: Mean annual soil temperature is about 52 degrees F., mean <br /> summer soil temperature is about 69 degrees F. Colors throughout the profile range from 7.5YR <br /> through 2.5Y in hue, 2 through 4 in chroma, and 4 through 8 in value. Texture of the A, AC, and Ck <br /> ' horizons are modified with pebbles and cobbles and range from gravelly sandy loam through very <br /> gravelly or extremely cobbly sand or sandy loam. <br /> ' The C horizon may range to extremely cobbly loamy sand or sand. <br /> The A horizon is mildly to moderately alkaline. <br />