LOCATION CLYL UT+COEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, carbonatic, frigid Typic Calciustolls
TYPICAL PEDON: Clyl channery silt loam, on a north facing, convex, 20 percent slope in antelope bitterbrush, needleandthread, bluebunch wheatgrass and mountain big sagebrush at an elevation of 7,840 feet. (Colors are for dry soil unless otherwise noted.)
The surface is covered by 35 percent flagstones and channers.
A1--0 to 2 inches; dark brown (7.5YR 3/2) channery silt loam, black (5YR 2.5/1) moist; weak very fine granular structure; soft, very friable, nonsticky and nonplastic; common medium, many fine and very fine roots; many fine and very fine tubular pores; 15 percent channers; very slightly effervescent; 2 percent calcium carbonate equivalent; calcium carbonate is disseminated; moderately alkaline (pH 8.0); clear smooth boundary. (2 to 4 inches thick)
A2--2 to 9 inches; brown (7.5YR 4/2) channery silt loam, very dark gray (5YR 3/1) moist; weak, medium and fine subangular blocky structure parting to weak fine granular; soft, very friable, nonsticky and nonplastic; few coarse, common medium, many fine and very fine roots; many fine and very fine tubular pores; 5 percent gravel, 25 percent channers; slightly effervescent; 2 percent calcium carbonate equivalent; calcium carbonate is disseminated and segregated as common fine nodules; moderately alkaline (pH 8.0); clear wavy boundary. (5 to 7 inches thick)
Bk1--9 to 19 inches; reddish brown (5YR 5/3) very channery silt loam, reddish brown (5YR 4/3) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common coarse and medium, many fine and few very fine roots; common medium, fine, and very fine tubular pores; 20 percent gravel, 30 percent channers; strongly effervescent; 34 percent calcium carbonate equivalent; calcium carbonate is disseminated and segregated as 1 to 3 mm thick coatings on underside of rock fragments; moderately alkaline (pH 8.1); gradual wavy boundary. (6 to 12 inches thick)
Bk2--19 to 29 inches; pinkish gray (5YR 7/2) very channery loam, reddish brown (5YR 5/3) moist; massive; hard, firm, slightly sticky and slightly plastic; common medium, many fine and very fine roots; few fine and very fine tubular pores; 10 percent gravel, 40 percent channers; strongly effervescent; 46 percent calcium carbonate equivalent; calcium carbonate is disseminated and segregated as 1 to 3 mm thick coatings on underside of rock fragments; moderately alkaline (pH 8.2); clear wavy boundary. (10 to 18 inches thick)
Bk3--29 to 60 inches; pinkish gray (7.5YR 7/2) extremely flaggy loam, light brown (7.5YR 6/4) moist; massive; hard, friable, slightly sticky and slightly plastic; few medium, fine, and very fine roots; few very fine tubular pores; 25 percent channers, 35 percent flagstones, 20 percent stones; strongly effervescent; 47 percent calcium carbonate equivalent; calcium carbonate is disseminated and segregated as 1 to 3 mm thick coatings on underside of rock fragments; moderately alkaline (pH 8.3).
TYPE LOCATION: Uintah County, Utah; about 30 miles northeast of Vernal on Diamond Mountain; located about 1,700 feet west and 2,400 feet north of the southeast corner of sec. 3, T. 2 S., R. 24 E., SLBM; USGS Crouse Reservoir, Utah quad; lat. 40 degrees 40 minutes 30 seconds N. and long. 109 degrees 12 minutes 26 seconds W., NAD 27
RANGE IN CHARACTERISTICS:
Soil moisture regime: The moisture regime is typic ustic.
The SMCS is affected by precipitation that is evenly distributed throughout the year with a slight increase during last summer and fall.
Mean annual soil temperature: 42 to 45 degrees F.
Surface rock fragments: channers, flagstones, and stones from dolomitic limestone
Particle-size control section: 18 to 27 percent clay; 50 to 80 percent gravel, channers, flagstones, and stones from dolomitic limestone
Calcium carbonate equivalent: 40 to 60 percent in the material less than 20 mm is size in the mineralogy control section. The dolomitic limestone rock fragments are 80 to 90 percent carbonates.
Depth to calcic horizon: 9 to 20 inches
Thickness of the mollic epipedon: 7 to 15 inches
These soils are calcareous to the surface after crushing and mixing the whole soil less than 20 mm in size to a depth of 7 inches.
A horizon
Value: 2 or 3 moist
Chroma: 2 or 3 dry, 1 or 2 moist
Rock fragments: 15 to 35 percent gravel, channers, flagstones, or stones
Calcium carbonate equivalent: 0 to 10 percent
It is noneffervescent in the upper part and slightly effervescent in the lower part.
Reaction: slightly alkaline or moderately alkaline
Bk horizon:
Chroma: 2 to 4
Texture: very channery silt loam, extremely channery silt loam, very channery loam, extremely flaggy loam
Rock fragments: 50 to 80 percent, predominantly channers and flagstones, with some stones and gravel
Calcium carbonate equivalent: 10 to 40 percent in the less than 2 mm fraction, but 40 to 60 percent in the less than 20 mm fraction.
COMPETING SERIES: These are the
Maiden and
Windham series.
Maiden and Windham soils have soil moisture control sections affected by peak periods of moisture in the spring. Maiden soils have a lithic contact at 20 to 40 inches.
GEOGRAPHIC SETTING: Clyl soils.
Parent material: colluvium derived from dolomitic limestone.
Landform: hillslopes and mountain slopes.
Slopes: 15 to 65 percent
Elevation: 7,000 to 9,000 feet
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
Cortyzack,
Dokie,
Flynncove, and
Pinerid series.
Cortyzack and Flynncove soils are on fan remnants and hills and have an argillic horizon.
Dokie soils are on north facing, very steep, mountain backslopes and have an argillic horizon.
Pinerid soils are on ridges and have a lithic contact at 12 to 20 inches.
DRAINAGE AND PERMEABILITY: Well drained, medium to high runoff, moderate permeability.
USE AND VEGETATION: These soils are used for livestock grazing, wildlife habitat, and recreation. Potential vegetation is mountain big sagebrush, Utah serviceberry, Utah snowberry, antelope bitterbrush, bluebunch wheatgrass, and bluegrass. This soil has been correlated to the Mountain Stony Loam (Antelope Bitterbrush) - 047CY456UT range site at the type location in Utah.
DISTRIBUTION AND EXTENT: Northeast Utah and northwest Colorado. LRR E, MLRA 47. This series is of small extent. Approximately 8,000 acres have been mapped to date.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Uintah, County (Dinosaur National Monument Area), Utah. 1997.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: The zone from the surface of the soil to 9 inches. (A1, A2 horizons)
Calcic horizon: The zone from 9 to 60 inches. (Bk1, Bk2, Bk3 horizons)
Carbonatic feature: the calcium carbonate equivalent is 40 to 60 percent by weight for the whole soil less than 20 millimeters in diameter.
The classification was changed from Typic Calciborolls to frigid Typic Calciustolls 12/98.
Taxonomy Version: Eighth Edition, 1998