LOCATION KILROY UTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Haplocalcids
TYPICAL PEDON: Kilroy loam, on a northeast facing, linear, 1 percent slope in shadscale and galleta at an elevation of 5,380 feet. (Colors are for dry soil unless otherwise noted.)
The surface is covered by 30 percent subrounded gravel.
A--0 to 4 inches; very pale brown (10YR 7/3) loam, brown (10YR 4/3) moist; moderate thin platy structure parting to moderate very fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; few medium, common fine, and very fine roots; many fine and very fine random tubular pores; slightly effervescent, carbonates are disseminated; strongly alkaline (pH 8.6); abrupt smooth boundary. (4 to 7 inches thick)
Bw--4 to 10 inches; very pale brown (10YR 7/4) clay loam, yellowish brown (10YR 5/4) moist; weak fine and very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few fine and many fine roots; common fine and very fine random tubular pores; slightly effervescent, carbonates are disseminated; strongly alkaline (pH 8.6); clear smooth boundary. (6 to 9 inches thick)
Bk1--10 to 16 inches; very pale brown (10YR 8/4) clay loam, light yellowish brown (10YR 6/4) moist; moderate coarse subangular blocky structure parting to moderate fine and very fine subangular blocky; slightly hard, friable, slightly sticky and moderately plastic; many very fine roots; common fine and very fine random tubular pores; 5 percent gravel; strongly effervescent, carbonates are disseminated and segregated as 1 mm thick coatings on rock fragments; strongly alkaline (pH 9.0); clear smooth boundary. (6 to 14 inches thick)
2Bk2--16 to 24 inches; very pale brown (10YR 7/3) gravelly loam, light yellowish brown (10YR 6/4) moist; weak medium and fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; many very fine roots; common fine and many very fine random tubular pores; 35 percent gravel; strongly effervescent, carbonates are disseminated and segregated as common fine and very fine nodules; strongly alkaline (pH 9.0); clear wavy boundary.
2Bk3--24 to 41 inches; very pale brown (10YR 7/4) gravelly loam, light yellowish brown (10YR 6/4) moist; massive; hard, friable, slightly sticky and slightly plastic; common very fine roots; common fine and many very fine random tubular pores; 25 percent gravel; strongly effervescent, carbonates are disseminated and segregated as 1 mm thick coatings on rock fragments; strongly alkaline (pH 9.0); clear wavy boundary. (The combined thickness of the 2Bk horizon is 18 to 25 inches)
2BCk--41 to 60 inches; very pale brown (10YR 7/4) very gravelly loam, light yellowish brown (10YR 6/4) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; common fine and many very fine random tubular pores; 40 percent gravel; slightly effervescent, carbonates are disseminated and segregated as few fine nodules and 1 mm thick coatings on rock fragments; strongly alkaline (pH 9.0).
TYPE LOCATION: Uintah County, Utah; about 22 miles south of Roosevelt on Eight Mile Flat; located about 800 feet north and 2,200 feet west of the southeast corner of sec. 35, T. 9 S., R. 17 E., SLBM; Crow Knoll, Utah USGS quad; lat. 39 degrees 58 minutes 58 seconds N. and long. 109 degrees 58 minutes 17 seconds W., NAD 27.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is affected by precipitation that falls throughout the year, with a slight increase in late summer and fall. The moisture regime is aridic.
Depth to secondary calcium carbonate: 10 to 16 inches
Depth to calcic horizon: 11 to 23 inches
Depth to cambic horizon: 4 to 7 inches
Depth to lithologic discontinuity: 16 to 30 inches to greater than 15 percent gravel
Mean annual soil temperature: 47 to 49 degrees F.
Surface rock fragments: 10 to 30 percent of the surface is covered by subrounded gravel.
Particle-size control section: 18 to 27 percent clay; 15 to 30 percent subrounded rock fragments from quartzite and sandstone
A horizon:
Hue: 7.5YR or 10YR
Value: 6 or 7 dry
Chroma: 3 or 4 dry or moist
Rock fragments: 0 to 15 percent subrounded gravel from sandstone and quartzite
Calcium carbonate equivalent: 3 to 15 percent
Reaction: moderately alkaline or strongly alkaline
Bw horizon:
Hue: 7.5YR or 10YR
Value: 5 to 7 dry, 4 or 5 moist
Chroma: 4 to 6 dry or moist
Texture: loam or clay loam
Rock fragments: 0 to 15 percent subrounded gravel from sandstone and quartzite
Calcium carbonate equivalent: 5 to 15 percent
Bk horizon:
Hue: 7.5YR or 10YR
Value: 6 to 8 dry, 5 or 6 moist
Chroma: 4 to 6 dry or moist
Texture: loam or clay loam
Rock fragments: 0 to 15 percent subrounded gravel from sandstone and quartzite
Calcium carbonate equivalent: 5 to 15 percent
2Bk horizon:
Hue: 7.5YR or 10YR
Value: 7 or 8 dry, 5 to 7 moist
Chroma: 3 or 4 dry, 4 to 6 moist
Rock fragments: 15 to 35 percent subrounded gravel from sandstone and quartzite
Calcium carbonate equivalent: 15 to 35 percent
Reaction: moderately alkaline or strongly alkaline
2BCk horizon:
Hue: 7.5YR or 10YR
Value: 5 to 7 dry, 4 to 6 moist
Chroma: 3 or 4 dry
Rock fragments: 35 to 60 percent subrounded gravel and cobbles from sandstone and quartzite
Calcium carbonate equivalent: 5 to 15 percent
Reaction: moderately alkaline or strongly alkaline
COMPETING SERIES: A current competitor is the Avalon series. Competitors prior to the Eighth Edition, 1998 Keys to Soil Taxonomy are the Minchey, Pariette, and Redhouse series.
Avalon soils have less than 15 percent rock fragments throughout the particle-size control section.
Minchey soils have an active CEC activity class.
Pariette soils are 20 to 40 inches deep over a paralithic contact with shale.
Redhouse soils have hue redder than 7.5YR.
GEOGRAPHIC SETTING:
Parent material: alluvium derived from sandstone and quartzite
Landform: fan remnants, strath terraces
Slopes: 1 to 4 percent
Elevation: 4,700 to 5,400 feet
Mean annual air temperature: 45 to 47 degrees F.
Mean annual precipitation: 5 to 8 inches
Frost-free period: 110 to 125 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Boreham, Leebench and Leeko series.
Boreham soils are on fan remnants and strath terraces and have less than 15 percent silicate clay in the particle-size control section.
Leebench and Leeko soils are on fan remnants and strath terraces and have natric horizons.
DRAINAGE AND PERMEABILITY: Well drained, low runoff, moderately slow permeability.
USE AND VEGETATION: These soils are mainly used for rangeland and wildlife habitat. Potential vegetation is shadscale, Indian ricegrass, galleta and globe mallow. These soils have been correlated to the Desert Loam (Shadscale) - 034XY106UT range site at the type location in Utah.
DISTRIBUTION AND EXTENT: Northern Utah. LRR D, MLRA 34. 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 comes from a geographic feature in the survey area.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 10 to 40 inches. (Bk1, 2Bk2, and 2Bk3 horizons)
Ochric epipedon: The zone from 0 to 4 inches. (A horizon)
Cambic horizon: The zone from 4 to 10 inches. (Bw horizon)
Calcic horizon: The zone from 16 to 41 inches. (2Bk1 and 2Bk2 horizons)
Taxonomic version: Eighth Edition, 1998.
The CEC activity class was inferred from laboratory data from similar soils in the Uintah Area soil survey.
The fine-loamy particle size classification is a tentative placement. Further investigation of these landforms and sediments would be necessary to understand the relative percentages of silicate and carbonate clays for definitive placement.