LOCATION SHUPERT UTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, calcareous, frigid Aridic Ustifluvents
TYPICAL PEDON: Shupert loam, on an east facing, slightly concave, 4 percent slope in rangeland at an elevation of 2,001 meters. (Colors are for air-dry soil unless otherwise noted.) When described on February 23, 1995, the soil was moist to 46 cm and slightly moist below this depth. The surface is covered by 2 percent cobbles and 10 percent gravel.
A--0 to 10 cm; brown (10YR 5/3) loam, dark grayish brown (10YR 4/2) moist; 19 percent clay; weak fine granular structure; very friable, soft, slightly sticky, slightly plastic; common coarse and medium and many fine and very fine roots; 1 percent stones, 2 percent cobbles, 10 percent gravel; slightly effervescent, carbonates are finely disseminated, carbonates are finely disseminated; slightly alkaline (pH 7.8); abrupt smooth boundary. (8 to 10 cm thick)
C1--10 to 30 cm; light yellowish brown (10YR 6/4) fine sandy loam, brown (10YR 4/3) moist; 17 percent clay; weak fine subangular blocky structure; very friable, slightly hard, slightly sticky, slightly plastic; common coarse, medium, fine and very fine roots; 3 percent gravel; slightly effervescent, carbonates are finely disseminated; moderately alkaline (pH 8.3); abrupt smooth boundary.
C2--30 to 72 cm; pale brown (10YR 6/3) clay loam, dark grayish brown (10YR 4/2) moist; 31 percent clay; moderate medium and fine subangular blocky structure; friable, slightly hard, moderately sticky, moderately plastic; common coarse, medium, fine and very fine roots; 5 percent cobbles, 8 percent gravel; strongly effervescent, carbonates are finely disseminated; moderately alkaline (pH 8.2); clear wavy boundary.
C3--72 to 92 cm; light brownish gray (10YR 6/2) cobbly clay loam, dark grayish brown (10YR 4/2) moist; 33 percent clay; weak medium and fine subangular blocky structure; friable, slightly hard, moderately sticky, moderately plastic; common coarse, medium, fine and very fine roots; 3 percent stones, 15 percent cobbles, 15 percent gravel; strongly effervescent, carbonates are finely disseminated; moderately alkaline (pH 8.4); clear wavy boundary.
C4--92 to 104 cm; light yellowish brown (10YR 6/4) very cobbly sandy loam, brown (10YR 5/3) moist; 19 percent clay; single grain; loose, slightly sticky, slightly plastic; common coarse, medium, fine and very fine roots; 3 percent stones, 15 percent cobbles, 30 percent gravel; strongly effervescent, carbonates are finely disseminated; moderately alkaline (pH 8.2); clear wavy boundary.
C5--104 to 160 cm; pale brown (10YR 6/3) very cobbly loam, brown (10YR 5/3) moist; 21 percent clay; massive; friable, slightly hard, slightly sticky, slightly plastic; few coarse and common medium, fine and very fine roots; 3 percent stones, 15 percent cobbles, 25 percent gravel; strongly effervescent, carbonates are finely disseminated; moderately alkaline (pH 8.4); gradual wavy boundary.
C6--160 to 188 cm; pale brown (10YR 6/3) very cobbly loam, grayish brown (10YR 5/2) moist; 20 percent clay; massive; friable, slightly hard, slightly sticky, slightly plastic; few coarse and medium, common fine and very fine roots; common brown (7.5YR 5/4) moist, masses of oxidized iron throughout; 3 percent stones, 20 percent cobbles, 25 percent gravel; strongly effervescent, carbonates are finely disseminated; moderately alkaline (pH 8.4).
TYPE LOCATION: Emery County, Utah; about 14.5 kilometers (9 miles) west-northwest of Huntington along Huntington Creek; 1,950 feet west and 700 feet south of the northeast corner of sec. 35, T. 16 S., R. 7 E.; Hiawatha USGS quad; lat. 39 degrees, 23 minutes, 36.00 seconds north latitude, 111 degrees, 6 minutes, 10.00 seconds west longitude, NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is affected by precipitation that has peak periods in December to March and July to October and falls evenly throughout the remainder of the year; ustic moisture regime bordering on aridic.
Mean annual soil temperature: 4.4 to 8 degrees C.
Mean summer soil temperature: 15 to 17.8 degrees C.
Depth to redoximorphic features: greater than 152 cm
Thickness of the ochric epipedon: 8 to 10 cm
Particle-size control section:
Clay content: 27 to 35 percent
Fine sand and coarser sand content: 20 to 50 percent
Rock fragment content: 0 to 35 percent
A horizon:
Hue: 10YR or 2.5Y
Value: 5 or 6 dry, 3 to 5 moist
Chroma: 2 or 3 dry or moist
Texture: loam, gravelly loam
Clay content: 15 to 25 percent
Rock fragments: 0 to 5 percent stones and boulders, 0 to 8 percent cobbles, 0 to 25 percent gravel
Calcium carbonate equivalent: 3 to 20 percent
EC (mmhos/cm): 0 to 2
Reaction: slightly alkaline or moderately alkaline
C horizon:
Hue: 10YR or 2.5Y
Value: 5 to 7 dry, 4 or 5 moist
Chroma: 2 to 4 dry or moist
Texture: fine sandy loam, clay loam, cobbly clay loam, very cobbly sandy loam, very cobbly loam
Clay content: 13 to 35 percent
Rock fragments: 0 to 5 percent stones, 0 to 40 percent cobbles, 0 to 25 percent gravel in any one stratum; most rock fragments occur below the particle-size control section
Calcium carbonate equivalent: 1 to 20 percent
Gypsum content: 0 to 1 percent
EC (mmhos/cm): 0 to 2
SAR: 0 to 1
Reaction: moderately alkaline
COMPETING SERIES: These are the Bullhook and Havre series. Bullhook soils have EC 4-16 and SAR 13-20 in the C horizon. . Havre soils have soil moisture that peaks in spring and early summer.
GEOGRAPHIC SETTING:
Parent material: mixed alluvium from sedimentary rocks, dominantly calcareous sandstone and shale
Landform: stream terraces and narrow canyon and valley floors
Slopes: 1 to 8 percent
Elevation: 1,951 to 2,316 meters
Mean annual temperature: 3.3 to 7.2 degrees C.
Mean annual precipitation: 30 to 41 cm
Precipitation pattern: Peaks from July to October and falls evenly throughout the remainder of the year
Frost-free period: 80 to 120 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dancehall (T), Neto, Podo, and Rabbitex soils. Dancehall soils are loamy-skeletal and are intermixed with the Shupert soils. Neto soils occur in drainageways at higher elevations, are coarse-loamy and have a typic ustic moisture regime. Podo soils are shallow to bedrock and are on canyon walls under pinyon and Utah juniper. Rabbitex soils have a mollic epipedon and a calcic horizon and are on mountain toeslopes and fans under Wyoming big sagebrush.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderately slow permeability, seasonal high water table may be present from April to August below a depth of 180 centimeters, rarely flooded for brief periods from March to October due to snowmelt and late summer thunderstorms.
USE AND VEGETATION: Used for rangeland and wildlife habitat. Native vegetation consists of Great Basin wildrye, basin big sagebrush, rubber rabbitbrush, fourwing saltbush, muttongrass, western wheatgrass, needleandthread, Indian ricegrass, and pepperweed.
DISTRIBUTION AND EXTENT: Northeastern and central Utah mountains, Warm Central Desertic Basins, Mountains and Plateaus; LRR D, MLRA 34B; small extent. About 4,300 acres (1,700 hectares) in Carbon, Emery, and Sevier Counties, Utah.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Paunsaugunt Area, Utah, 1969.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Series control section: The zone from 0 to 200 cm.
Particle-size control section: The zone from 25 to 102 cm. (parts of the C1, C2 and C3 horizons)
Ochric epipedon: The zone from 0 to 10 cm. (A horizon)
Redoximorphic features: masses of oxidized iron from 160 to 188 cm (C6 horizon)
Fluvent feature: Irregular decrease of organic carbon from a depth of 25 to 125 cm; or at least 0.2 percent organic carbon of Holocene age at a depth of 125 cm below the soil surface
These soils were formerly classified as Typic Ustifluvents, loamy-skeletal, mixed, superactive, calcareous, frigid. The type location was moved to Emery County and the soil moisture regime was changed from typic ustic in April 2008 since the original type location is no longer mapped Shupert.
Capillary rise may occur below a depth of 152 cm which may account for masses of oxidized iron in horizons below this depth.
The assignment of the cation-exchange activity class is inferred from lab data from similar soils in the surrounding area.
Taxonomic Version: Classified according to Keys to Soil Taxonomy, Tenth Edition, 2006.