LOCATION BEQUINN UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, calcareous, frigid Xeric Torriorthents
TYPICAL PEDON: Bequinn very gravelly loam, on a 45 percent west facing convex-concave slope in rangeland. (When described the soil was moist to 26 inches. Colors are for air dry soil unless otherwise noted.)
A1--0 to 5 inches; dark brown (7.5YR 4/3) very gravelly loam,dark brown (7.5YR 3/2) moist; weak fine granular structure; soft, friable, slightly sticky and slightly plastic; common fine and very fine roots; 40 percent pebbles; mildly alkaline (pH 7.8); clear smooth boundary. (5 to 9 inches thick)
C1--5 to 12 inches; brown (10YR 5/3) very gravelly loam, dark brown (10YR 4/3) moist; weak fine subangular blocky structure parting to weak fine granular; slightly hard, friable, slightly sticky and slightly plastic; few fine and very fine roots; 55 percent pebbles; moderately calcareous; strongly alkaline (pH 8.8); gradual wavy boundary. (6 to 12 inches thick)
C2--12 to 26 inches; pale brown (10YR 6/3) very gravelly sandy loam, grayish brown (10YR 5/2) moist; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few very fine roots; 60 percent pebbles; strongly calcareous; strongly alkaline (pH 8.9); gradual wavy boundary. (9 to 15 inches thick)
C3--26 to 60 inches; light brownish gray (10YR 6/2) extremely gravelly loamy sand, brown (10YR 4/3) moist; single grained; loose; few very fine roots; 65 percent pebbles and 15 percent cobbles; strongly calcareous; strongly alkaline (pH 8.6).
TYPE LOCATION: Rich County, Utah; 2 miles north and 1/2 mile east of the South Lake; 1,200 feet south and 700 feet east of the NW corner of section 17, T.14N., R.8E.
RANGE IN CHARACTERISTICS: Rock fragments in the particle size control section range from 55 to 80 percent, with 50 to 65 percent as pebbles and 0 to 20 percent as cobbles. The mean annual soil temperature ranges from 38 to 42 degrees F., and the mean summer soil temperature ranges from 59 to 62 degrees F. These soils are dry in all parts 50 to 60 percent of the time the soil temperature at a depth of 20 inches is warmer than 41 degrees F. Calcium carbonate ranges from 15 to 30 percent.
The A horizon has hue of 10YR or 7.5YR, value of 4 or 5 dry, 3 or 4 moist, and chroma of 3 through 6 moist and dry. It is mildly alkaline to strongly alkaline.
The C horizon has hue of 10YR, 7.5YR or 5YR, value of 5 through 8 dry, 3 through 5 moist, and chroma of 2 through 6 dry and moist. The upper part is very gravelly loam or very gravelly sandy loam. The lower part is extremely gravelly loamy sand or extremely gravelly sand.
COMPETING SERIES: This is the Ramshorn series in another family. Ramshorn soils have more than 40 percent calcium carbonate in the control section.
GEOGRAPHIC SETTING: Bequinn soils are on mountain slopes at elevations of 6,200 to 7,500 feet. Slope is 30 to 50 percent. The soils formed in colluvium derived mainly from conglomerate composed of sandstone, limestone and quartzite. The climate is arid. The average annual precipitation is 9 to 13 inches. The mean annual temperature is 36 to 40 degrees F.; the mean summer temperature is 59 to 62 degrees F.; and the frost free season is 50 to 65 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Duckree, Dagan, Solak, and Pancheri soils. Duckree soils have a calcic horizon. Dagan soils have a calcic horizon and a mollic epipedon. Pancheri soils have less than 10 percent rock fragments in the particle size control section. Solak soils are shallow over bedrock.
DRAINAGE AND PERMEABILITY: Well drained; rapid runoff; moderate permeability.
USE AND VEGETATION: Use mainly for rangeland. The native vegetation is Indian ricegrass, bluebunch wheatgrass, big sagebrush, and Sanberg bluegrass.
DISTRIBUTION AND EXTENT: Bequinn soils are of small extent in northeastern Utah.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Rich County, Utah, 1980.
REMARKS:
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.