LOCATION BUCKCAMP UTEstablished Series
TAXONOMIC CLASS: Fine-loamy over sandy or sandy-skeletal, mixed, superactive, frigid Typic Argiustolls
TYPICAL PEDON: Buckcamp channery loam, on a south facing, linear to concave, 39 percent slope in gamble oak and mountain big sagebrush at an elevation of 9,040 feet. (Colors are for dry soil unless otherwise noted.)
The surface is covered by 15 percent angular channers, and 5 percent flagstones.
A1--0 to 2 inches; brown (10YR 4/3), channery loam, very dark grayish brown (10YR 3/2) moist; moderate thin platy structure parting to moderate very fine granular; slightly hard, very friable, slightly sticky and nonplastic; many very fine and fine, common fine and medium roots; common very fine and fine tubular pores; 10 percent channers; neutral (pH 7.2); abrupt smooth boundary.
A2--2 to 7 inches; brown (10YR 4/3) channery loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; parting to moderate very fine and fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine, common fine and medium roots; many very fine, common fine, few medium tubular pores; 10 percent channers; slightly alkaline (pH 7.4); abrupt smooth boundary. (combined thickness of A horizons range from 7 to 12 inches thick)
Bt--7 to 15 inches; yellowish brown (10YR 5/4) clay loam, dark brown (10YR 3/3); moderate medium subangular blocky structure parting to moderate very fine and fine subangular blocky; hard, friable, sticky and slightly plastic; many very fine, common fine, few medium and coarse roots; common very fine and fine, few medium tubular pores; few distinct clay films on ped faces; 15 percent channers; slightly alkaline (pH 7.6) clear wavy boundary. (9 to 14 inches thick)
2CBk1--15 to 30 inches; yellowish brown (10YR 5/6) very flaggy sand, dark yellowish brown (10YR 4/4) moist; single grain; soft, very friable, nonsticky and nonplastic; few very fine, fine, and medium roots; common very fine and fine interstitial pores; 10 percent stones, 20 percent channers, 20 percent flagstones; matrix is noneffervescent, carbonates are segregated in less than 1 mm thick coats on rock fragments; slightly alkaline (pH 7.6); gradual wavy boundary.
2CBk2--30 to 45 inches; yellowish brown (10YR 5/6) very flaggy sand, dark yellowish brown (10YR 4/6) moist; single grain; soft, loose, nonsticky and nonplastic; few very fine, fine, and medium roots; common very fine and fine interstitial pores; 10 percent stones, 20 percent channers, 20 percent flagstones; matrix is noneffervescent, carbonates are segregated in less than 1 mm thick coats on rock fragments; slightly alkaline (pH 7.8); gradual wavy boundary. (combined thickness of the 2CBk horizons range from 24 to 34 inches thick)
2R--45 inches; unweathered hard sandstone bedrock.
TYPE LOCATION: Grand County, Utah; about 1 mile north of Surveyors Hole; located about 200 feet east and 200 feet south of the northwest corner of sec. 14, T.19S., R.20E., SLBM; Bogart Canyon, Utah USGS quad; lat. 39 degrees 9 minutes 51 seconds N. and long. 109 degrees 41 minutes 19 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 late summer and early fall. The soil moisture regime is Typic Ustic.
Mean annual soil temperature: 42 to 45 degrees F.
Surface rock fragments: 15 to 35 percent angular shale and fine grained sandstone channers.
Depth to secondary calcium carbonate: 15 to 26 inches
Depth to lithologic discontinuity: 16 to 26 inches to sandy-skeletal materials
Depth to lithic contact: 40 to 60 inches to sandstone bedrock
Thickness of the mollic epipedon: 7 to 15 inches
Particle-size control section: 27 to 35 percent clay and 0 to 15 percent shale channers in the upper part and 0 to 5 percent clay and 35 to 70 percent flagstones and channers from sandstone in the lower part.
A horizon:
Hue: 7.5YR or 10YR
Value: 2 or 3 moist
Chroma: 2 or 3 dry or moist
Reaction: neutral or slightly alkaline
Bt horizon:
Value: 3 or 4 moist
Chroma: 3 or 4 dry or moist
Rock fragments: 0 to 15 percent angular channers from shale
2CBk horizon:
Chroma: 3 to 6 dry or moist
Rock fragments: 35 to 70 percent angular channers and flagstones from sandstone
Calcium carbonate equivalent: 0 to 3 percent in matrix (calcium carbonate is predominantly segregated as less than 1 mm coats on rock fragments)
COMPETING SERIES: These are the Hedstrom and Turner series.
Hedstrom: has less than 35 percent rock fragments in the lower part of the particle-size control section.
Turner: has soil moisture control sections affected by peak periods of precipitation in the spring and has horizons with greater than 5 percent calcium carbonate.
GEOGRAPHIC SETTING:
Parent material: slope alluvium and colluvium derived from shale over residuum derived from sandstone
Landform: mountain slopes
Slopes: 25 to 40 percent
Elevation: 7,200 to 9,100 feet
Aspect: southerly
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 Soward, Tosca, and Wildcow series.
Soward soils occur on stream terraces, are coarse-loamy, and very deep.
Tosca soils occur on mountain slopes, are loamy-skeletal, and have a calcic horizon.
Wildcow soils occur on northerly facing mountain slopes, has a cryic temperature regime, and are very deep.
DRAINAGE AND PERMEABILITY: Well drained, high runoff, moderately slow permeability.
USE AND VEGETATION: The major uses are rangeland, wildlife habitat, and recreation. The potential native plant community is Gambel oak, serviceberry, snowberry, bluegrass, wheatgrass, and mountain big sagebrush. These soils have been correlated to Mountain Loam (Oak) - 048AY415UT range sites in Utah.
DISTRIBUTION AND EXTENT: Northeastern Utah. LRR E, MLRA 48A. This series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Grand 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 7 to 40 inches. (Bt
Mollic epipedon: The zone from 0 to 12 inches. (A1, A2, Bt horizons)
Argillic horizon: The zone from 7 to 16 inches. (Bt horizon)Lithologic discontinuity: Sandy-skeletal materials starting at the top of the 2CBk1 horizon.
Lithic contact: The contact with unweathered sandstone at 45 inches. (2R layer)
This soil is located at elevations transitionalto a udic soil moisture regime, but because of predominant southerly aspects it has been correlated into a Typic Ustic moisture regime and Mountain range site zone.
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."
Taxonomic version: Eighth Edition, 1998.