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12/23/21,3:33 PM Official Series Description-CASCAJO Series <br /> LOCATION CASCAJO CO+NM <br /> Established Series <br /> RJL/GB <br /> 07/97 <br /> CASCAJO SERIES <br /> The Cascajo series consists of deep, excessively drained soils that formed in very gravelly and sandy alluvium <br /> over shale or sandstone at depths of 4 to 20 feet. Cascajo soils are on terraces, terrace edges and ridges and have <br /> slopes of 2 to 40 percent. The mean annual precipitation is about 12 inches and the mean annual temperature is <br /> 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 otherwise <br /> noted.) <br /> A--O to 6 inches; light brown(7.5YR 6/4)very gravelly sandy loam, dark brown (7.5YR 4/4)moist; moderate <br /> medium granular structure; slightly hard, very friable; common very fine roots; 40 percent pebbles, 15 percent <br /> cobbles; weakly calcareous; moderately alkaline; clear wavy boundary. (2 to 6 inches thick) <br /> AC--6 to 10 inches; light brown(7.5YR 6/4)very gravelly sandy loam, dark brown (7.5YR 4/4)moist; weak <br /> medium subangular blocky structure; slightly hard, very friable; common very fine roots; 40 percent pebbles, 10 <br /> percent cobble; slightly calcareous; moderately alkaline; clear irregular boundary. (0 to 8 inches thick) <br /> Ck--10 to 21 inches; very pale brown(IOYR 8/3)very gravelly sandy loam, pale brown(IOYR 6/3)moist; weak <br /> medium subangular blocky structure; slightly hard, loose; few very fine roots; 40 percent pebbles, 5 percent <br /> cobbles; strongly calcareous and thick lime coatings on pebbles and cobbles; moderately alkaline; clear wavy <br /> 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 gravelly <br /> sand,brown(IOYR 5/3)moist; single grain; loose; 40 percent pebbles, 15 percent cobbles; strongly calcareous; <br /> moderately alkaline. <br /> TYPE LOCATION: Pueblo County, Colorado; northwest 1/4 of southeast 1/4 of Sec. 15, T. 21 S., R. 64 W. <br /> RANGE IN CHARACTERISTICS: Mean annual soil temperature is about 52 degrees F.,mean summer soil <br /> temperature is about 69 degrees F. Colors throughout the profile range from 7.5YR through 2.5Y in hue, 2 <br /> through 4 in chroma, and 4 through 8 in value. Texture of the A, AC, and Ck horizons are modified with pebbles <br /> and cobbles and range from gravelly sandy loam through very 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 /> Volume of coarse fragments in the C ranges from 35 to 80 percent with 5 to 30 percent larger than 3 inches. <br /> COMPETING SERIES: The closely related Pala soils lack a calcic horizon. <br /> GEOGRAPHIC SETTING: Cascajo soils are on terrace edges, hills, knolls and ridges. Slopes range from 2 to <br /> 40 percent. The soils formed in very gravelly and sandy alluvium that ranges from about 4 to 20 feet thick over <br /> https:gsoilseries.sc.egov.usda.gov/OSD_Docs/C/CASCAJO.html 1/2 <br />