LOCATION REXMONT UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, frigid Lithic
Haploxerolls
TYPICAL PEDON: Rexmont gravelly loam -on a 38 percent, slightly convex south-facing slope in woodland. (When described the soil was dry throughout. Colors are for air dry soil unless otherwise stated.)
A1--0 to 8 inches; brown (10YR 4/3) gravelly loam, dark brown
(10YR 3/3) moist; weak fine subangular blocky structure parting to weak fine granular; soft, friable, slightly sticky and slightly plastic; common fine and few medium roots; 30 percent gravel; moderately alkaline (pH 8.1); gradual smooth boundary. (4 to 9 inches thick)
A2--8 to 15 inches; brown (10YR 4/3) very cobbly loam, dark brown (10YR 3/3) moist; moderate fine subangular blocky structure parting to weak fine granular; slightly hard, friable, slightly sticky and slightly plastic; few fine and medium roots; 20 percent gravel and 20 percent cobbles; moderately calcareous, carbonates are disseminated; strongly alkaline (pH 8.5); clear wavy boundary. (4 to 11 inches thick)
R--15 inches; limestone.
TYPE LOCATION: Rich County, Utah; about 6 1/2 miles east and 1/2 mile south of Randolph; 1,650 feet west and 1,500 feet south of the northeast corner, sec. 32, T. 11 N., R. 8 E.
RANGE IN CHARACTERISTICS: The thickness of the mollic epipedon and depth to bedrock range from 8 to 20 inches. The particle size control section hue 18 to 27 percent clay. Rock fragments in the particle size control section are angular and range from 35 to 60 percent, 25 to 40 percent as pebbles and 0 to 35 percent as cobbles. The mean annual soil temperature is 37 to 41 degrees F, and the mean summer soil temperature is 59 to 62 degrees F. The soil is usually dry, but is moist in all parts of the moisture control section 45 to 60 consecutive days or more during the 4 months after the winter solstice.
The A horizon is gravelly loam in the upper part and very gravelly loam or very cobbly loam in the lower part. It has value of 4 or 5 dry and chroma of 3 or 4 moist and dry. This horizon is moderately alkaline or strongly alkaline and noncalcareous to moderately calcareous.
COMPETING SERIES: These are the Agassiz, Anatone, Bocker, Cedaran, Falula, Foxol, Gando, Little Pole, Swanner and Van Wagoner series. Agassiz soils are slightly acid or mildly alkaline. Anatone, Bocker and Foxol soils have hue redder than 10YR and are neutral or slightly acid. Cedaran and Little Pole soils have a cambic horizon. Falula soils have hue of 2.5YR or redder and have a Bk horizon. Grando soils have a Bk horizon. Swanner soils have a horizon of secondary carbonate accumulation. Van Wagoner soils have a sandy loam particle size control section and are neutral to medium acid in the control section.
GEOGRAPHIC SETTING: Rexmont soils are on mountain slopes and ridgetops. Slopes range from 6 to 70 percent, are convex and dominantly south- and west-facing. The soils formed in residuum and some colluvium derived dominantly from limestone. Elevations are 6,400 to 8,000 feet. The mean annual temperature is 35 to 39 degrees F, and the average annual precipitation is 10 to 13 inches. Freeze-free season is 50 to 75 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Fontreen, Highams Variant, Pancheri, and Vicking soils. Fontreen, Pancheri and Vicking soils are very deep and have a calcic horizon. Highams Variant, Pancheri and Vicking soils have less than 35 percent rock fragments in the particle size control section.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; medium or rapid runoff; moderate permeability.
USE AND VEGETATION: These soils are used for woodland and rangeland. Native vegetation is Utah juniper, bluebunch wheatgrass, low sagebrush, and black sagebrush.
DISTRIBUTION AND EXTENT: Rexmont soils occur in northeastern Utah. They are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Rich County, Utah, 1980.
REMARKS: Diagnostic horizon and features recognized in this pedon are:
Mollic epipedon -The zone from the surface of the sola to 15
inches (A1, A2 horizons).
Lithic Feature -Hard bedrock at 15 inches (R horizon).