LOCATION FOXPOINT UTEstablished Series
TAXONOMIC CLASS: Sandy-skeletal, siliceous, frigid Typic Haplustolls
TYPICAL PEDON: Foxpoint extremely stony loamy sand, on a northwest facing, concave, 75 percent slope in browse rangeland at an elevation of 6,400 feet. (Colors are for dry soil unless otherwise noted.)
The surface is covered by 15 percent stones, 20 percent cobbles, and 15 percent gravel, predominantly sandstone.
A--0 to 12 inches; brown (10YR 4/3) extremely stony loamy sand, dark brown (10YR 3/3) moist; weak fine and very fine granular structure; soft, very friable, nonsticky and nonplastic; common coarse, medium and fine and many very fine roots; few medium, common fine and many very fine tubular pores; 10 percent stones, 10 percent cobbles, and 10 percent gravel; slightly alkaline (pH 7.4); abrupt wavy boundary. (10 to 15 inches thick)
C1--12 to 37 inches; yellowish brown (10YR 5/6) very stony loamy sand, dark yellowish brown (10YR 4/4) moist; massive; soft, friable, nonsticky and nonplastic; few medium and fine, common very fine roots; few medium, common fine and very fine tubular pores; 15 percent stones, 15 percent cobbles and 20 percent gravel; slightly calcareous, carbonates are disseminated; slightly alkaline (pH 7.4); clear wavy boundary.
C2--37 to 60 inches; very pale brown (10YR 7/4) very stony sand (10YR 6/4) moist; massive; soft, loose, nonsticky and nonplastic; few medium, fine and very fine roots; few medium, common fine and very fine tubular pores; 20 percent stones, 20 percent cobbles and 20 percent gravel; slightly calcareous, carbonates are disseminated; slightly alkaline (pH 7.6).
TYPE LOCATION: Uintah County, Utah; about 1 1/4 miles south of Brush Creek Canyon overlook; located about 4,000 feet south and 200 feet west of the northeast corner of sec. 23, T.2S., R.21E., SLBM; Dyer Mountain, Utah USGS quad; lat. 40 degrees 37 minutes 35 seconds N. and long. 109 degrees 31 minutes 11 seconds W., NAD 27
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is affected by precipitation that falls evenly through the year with a slight increase in the late summer and early fall. Typic Ustic moisture regime.
Mean annual soil temperature: 42 to 45 degrees F.
Surface rock fragments: 35 to 60 percent (predominantly stones and cobbles from sandstone).
Thickness of the mollic epipedon: 10 to 15 inches
Particle-size control section: 3 to 10 percent clay and greater than 35 percent sandstone rock fragments
A horizon:
Hue: 7.5YR or 10YR
Rock fragments: 60 to 80 percent sandstone gravel, cobbles, and stones
C horizon:
Hue: 7.5YR or 10YR
Value: 5 to 7 dry, 4 to 6 moist
Chroma: 4 or 6 dry or moist
Fine earth texture: loamy sand or sand
Rock fragments: 35 to 80 percent (predominantly stones and cobbles from sandstone)
COMPETING SERIES: These are no competing series in this family.
GEOGRAPHIC SETTING:
Parent material: colluvium derived from sandstone
Landform: mountain slopes
Slopes: 50 to 80 percent
Elevation: 6,400 to 8,000 feet (the lower elevations are predominantly on northerly aspects)
Mean annual air temperature: 40 to 43 degrees F.
Mean annual precipitation: 16 to 22 inches
Frost-free period: 70 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Flynncove, Tridell, and Tyzut series.
Flynncove soils occur on fan remnants and have an argillic horizon.
Tridell soils occur on fan remnants and have a calcic horizon.
Tyzut soils occur on hillslopes and are shallow to limestone bedrock.
DRAINAGE AND PERMEABILITY: Excessively drained, medium runoff, rapid permeability.
USE AND VEGETATION: The major uses are wildlife habitat and recreation. The potential native plant community is birchleaf mountainmahogany, Utah serviceberry, bluebunch wheatgrass, mountain big sagebrush, bluegrass, arrowleaf balsamroot, and needleandthread. These soils have been correlated to Mountain Very Steep Stony Loam (Browse) - 047CY474UT in Utah.
DISTRIBUTION AND EXTENT: Northeastern Utah. LRR E, MLRA 47. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Uintah County, Uintah Area Soil Survey, Utah. 1998. The name is taken from a nearby geographic location.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 10 to 40 inches. (C1 and C2 horizons)
Mollic epipedon: The zone from 0 to 12 inches. (A horizon)
The cation exchange activity class was inferred from laboratory data from similar soils in the Uintah Area Soil Survey.
The surface texture modifier was determined following the guidelines outlined in the Utah document, "Procedures for Distributing Rock Fragments on the Surface Layer into the Upper 6 inches of Soil and Subsequent Naming of Map Units, April 1979."
The classification was changed from Typic Haploborolls to frigid, Typic Haplustolls 11/98.
Taxonomic version: Eighth Edition, 1998.