LOCATION TYZUT UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Lithic Calciustolls
TYPICAL PEDON: Tyzut very channery silt loam, on a south facing, concave-convex, 12 percent slope under black sagebrush/bluebunch wheatgrass at an elevation of 7,100 feet. (Colors are for dry soil unless otherwise noted.)
A--0 to 4 inches; brown (7.5YR 5/4) very channery silt loam, dark brown (7.5YR 3/2) moist; moderate thin platy structure parting to moderate very fine granular; soft, friable, slightly sticky and slightly plastic; few medium and coarse, common fine, and many very fine roots; few medium, common fine and many very fine tubular pores; 30 percent channers; 40 percent of the surface is covered with channers; moderately alkaline (pH 8.0); clear smooth boundary. (2 to 5 inches thick)
Bk1--4 to 7 inches; brown (7.5YR 5/4) channery silt loam, dark brown (7.5YR 3/4) moist; moderate fine and very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few medium and coarse, common fine and many very fine roots; few medium, common fine and many very fine tubular pores; slightly effervescent, carbonates are disseminated and segregated as less than 1 mm thick coatings on underside of rock fragments, 8 percent calcium carbonate equivalent; 35 percent channers; moderately alkaline (pH 8.0); clear wavy boundary. (3 to 7 inches thick)
Bk2--7 to 11 inches; brown (7.5YR 5/4) extremely channery loam, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few medium and coarse, common fine, and many very fine roots; few medium, common fine, and many very fine tubular pores; strongly effervescent, carbonates are disseminated and segregated as 1 mm thick coatings around rock fragments, 26 percent calcium carbonate equivalent; 20 percent flagstones and 45 percent channers; moderately alkaline (pH 8.0); clear wavy boundary.
Bk3--11 to 17 inches; very pale brown (10YR 7/3) extremely channery loam, yellowish brown (10YR 5/4) moist; massive; hard, very friable, slightly sticky and slightly plastic; few medium, common fine and very fine roots; few medium, common fine and very fine tubular pores; violently effervescent, carbonates are disseminated and segregated as 1 to 3 mm thick coatings around rock fragments, 37 percent calcium carbonate equivalent; 10 percent flagstones and 60 percent channers; moderately alkaline (pH 8.2); abrupt smooth boundary. (Combined thickness of the Bk horizons is 6 to 12 inches)
R--17 inches; unweathered limestone bedrock.
TYPE LOCATION: Uintah County, Utah; about 15 miles northeast Vernal; USGS Burnt Cabin Gorge, Utah Quadrangle; 2,000 feet west and 2,800 feet south of the northeast corner of MS6778, T.2S., R.22E., SLBM; latitude 40 degrees 37 minutes 51 seconds north longitude 109 degrees 27 minutes 3 seconds west, NAD 27.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is affected by precipitation that falls evenly throughout the year with a slight increase in the late summer and fall. Ustic bordering on Aridic.
Mean annual soil temperature: 44 to 47 degrees F.
Surface rock fragments: 30 to 60 percent of surface covered with 0 to 5 percent stones, 0 to 10 percent flagstones, and 15 to 45 percent channers and angular gravel originating from limestone
Depth to lithic contact: 10 to 20 inches to limestone
Depth to calcic horizon: 7 to 13 inches
Thickness of the mollic epipedon: 7 to 11 inches
Particle-size control section: 18 to 27 percent clay and 35 to 85 percent mostly channers, and flagstones
A horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 1 to 4
Rock fragments: 35 to 60 percent after mixing surface fragments to 6 inches
Carbonates are usually leached in upper 2 to 4 inches; calcareous after mixing upper 7 inches
Reaction: slightly alkaline or moderately alkaline
Bk1 horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5 dry, 2 or 3 moist
Chroma: 2 to 4
Texture: channery silt loam, channery loam, or very channery loam
Rock fragments: 35 to 60 percent mostly channers and flagstones
Calcium carbonate equivalent: 1 to 15 percent
Bk2 and Bk3 horizons:
Hue: 7.5YR or 10YR
Value: 6 or 7 dry, 4 or 5 moist
Chroma: 2 to 4
Texture: very channery loam or extremely channery loam
Rock fragments: 35 to 85 percent mostly channers and flagstones
Calcium carbonate equivalent: 20 to 40 percent
Reaction: slightly alkaline or moderately alkaline
COMPETING SERIES: Currently the Tyzak series is the only competitor. However, the type location and concept of the Tyzak series is being moved to Albany County Wyoming where a new concept and description will be developed. It is anticipated that Tyzak will have a typic ustic soil moisture regime that is affected by peak periods of precipitation from April through July.
GEOGRAPHIC SETTING:
Parent material: slope alluvium and colluvium derived from limestone
Landform: hills
Slopes: 8 to 50 percent
Elevation: 6,700 to 8,000 feet
Mean annual air temperature: 42 to 45 degrees F.
Mean annual precipitation: 12 to 16 inches
Frost-free period: 90 to 110 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cortyzack, Flynncove, Gompers, Tridell, and Wildmount series.
Cortyzack, Flynncove soils: on hill toeslopes and fan remnants and greater than 60 inches deep
Gompers soils: similar landscapes and have an ochric
epipedon
Tridell and Wildmount soils: on mountain slopes and greater than 60 inches deep
DRAINAGE AND PERMEABILITY: Well drained, medium and high runoff, moderate permeability.
USE AND VEGETATION: These soils are used for rangeland, woodland, wildlife habitat and recreation. Native potential vegetation is black sagebrush, pinyon, Utah juniper, bluebunch wheatgrass, prairie junegrass, and rock goldenrod. This soil has been correlated to the Upland Shallow Loam (Black Sagebrush) - 047CY320UT range site at the type location in Utah.
DISTRIBUTION AND EXTENT: Northeastern Utah. LRR E, MLRA 47. The series is of small extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Uintah County, Uintah Area Soil Survey, Utah, 1998
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 10 to 17 inches. (Bk2 and Bk3 horizons)
Mollic epipedon: After mixing, the zone from the surface to 7 inches. (A and Bk1 horizons).
Calcic horizon: The zone from 7 to 17 inches (Bk2 and Bk3 horizons).
Lithic contact: The contact with limestone bedrock at 17 inches. (R layer)
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 cation exchange activity class was inferred from laboratory data from similar soils in the Uintah Area Soil Survey.
Taxonomic version: Seventh Edition, 1996.
This series was formerly called Tyzak. The type location for the Tyzak series is being moved to Albany County, Wyoming where a new concept and description is to be developed.
ADDITIONAL DATA: