LOCATION BACONPARK UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, carbonatic, frigid, shallow Petrocalcic Calciustolls
TYPICAL PEDON: Baconpark very gravelly loam, on a southeast facing, 4 percent slope in rangeland at an elevation of 6,900 feet. (Colors are for dry soil unless otherwise noted.)
The surface is covered by 1/2 inch of undecomposed or slightly decomposed litter consisting of mainly needles and twigs. It is also covered by 50 percent rock fragments and hardpan fragments.
A--0 to 6 inches; brown (7.5YR 4/3) very gravelly loam, dark brown (7.5YR 3/3) moist; weak medium subangular blocky structure parting to moderate very fine and fine subangular blocky; soft, very friable, slightly sticky and slightly plastic; many very fine, fine, and medium, few coarse roots; many very fine and fine, common medium tubular pores; 10 percent gravel and 10 percent gravel sized hardpan fragments; very slightly effervescent (8 percent calcium carbonate equivalent), carbonates are disseminated and segregated in few irregularly shaped fine masses, and in few hardpan fragments; moderately alkaline (pH 8.0); clear smooth boundary. (5 to 8 inches thick)
Bk1--6 to 10 inches; brown (7.5YR 4/3) very gravelly loam, dark brown (7.5YR 3/3) moist; moderate medium subangular blocky structure parting to moderate very fine and fine subangular blocky; soft, friable, slightly sticky and slightly plastic; many very fine, common medium, few coarse roots; many very fine and fine, few medium tubular pores; 35 percent gravel, 10 percent gravel sized hardpan fragments; slightly effervescent (14 percent calcium carbonate equivalent), carbonates are disseminated and segregated in few irregularly shaped fine masses, and in hardpan fragments; moderately alkaline (pH 8.2); clear wavy boundary. (4 to 7 inches thick)
Bk2--10 to 15 inches; brown (7.5YR 4/3) extremely gravelly loam, dark brown (7.5YR 3/4) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and fine, common fine, few medium and coarse roots; many very fine, common fine, few medium tubular pores; 15 percent gravel, 45 percent gravel sized hardpan fragments, 10 percent cobble sized hardpan fragments; strongly effervescent (41 percent calcium carbonate equivalent), carbonates are disseminated and in hardpan fragments; moderately alkaline (pH 8.4); gradual wavy boundary. (4 to 8 inches thick)
Bk3--15 to 18 inches; light brown (7.5YR 6/4) extremely gravelly loam, brown (7.5YR 4/3) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine, common fine, few medium and coarse roots; many very fine, common fine, few medium tubular pores; 15 percent gravel, 45 percent gravel sized hardpan fragments, 10 percent cobble sized hardpan fragments; violently effervescent (41 percent calcium carbonate equivalent), carbonates are disseminated and in hardpan fragments; strongly alkaline (pH 8.6); abrupt wavy boundary. (0 to 3 inches thick)
Bkm--18 to 24 inches; indurated calcium carbonate hardpan.
TYPE LOCATION: Uintah County, Utah; about 0.5 miles southwest of Elkhorn Guard Station; located about 2,000 feet south and 2,300 feet west of the northeast corner of sec. 26, T. 2 N., R. 1 W., USBM; Ice Cave Peak, Utah USGS quad; lat. 40 degrees 32 minutes 37 seconds N. and long. 109 degrees 58 minutes 6 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. Ustic moisture regime bordering on aridic.
Mean annual soil temperature: 44 to 47 degrees F.
Mean annual summer soil temperature: 66 to 69 degrees F.
Depth to petrocalcic horizon: 10 to 20 inches
Depth to calcic horizon: 9 to 15 inches
Thickness of the mollic epipedon: 7 to 12 inches
Particle-size control section: 18 to 27 percent clay; 50 to 80 percent gravel, cobbles (of quartzite, limestone, sandstone, and shale origin), and hardpan fragments; 40 to 50 percent calcium carbonate equivalent
A horizon:
Chroma: 2 or 3 moist
Rock fragments: 35 to 60 percent gravel, cobbles and hardpan fragments
Calcium carbonate equivalent: 1 to 10 percent
Bk1 horizon:
Value: 4 or 5 dry, 3 or 4 moist
Chroma: 3 or 4 dry or moist
Texture: very gravelly loam, very gravelly sandy clay loam, very cobbly loam, or very cobbly sandy clay loam
Rock fragments: 35 to 60 percent gravel, cobbles and hardpan fragments
Calcium carbonate equivalent: 10 to 30 percent
Lower Bk horizons:
Value: 3 to 5 moist
Texture: extremely gravelly loam or extremely cobbly sandy clay loam
Rock fragments: 60 to 80 percent gravel, cobbles, and hardpan fragments
Calcium carbonate equivalent: 40 to 50 percent
COMPETING SERIES: This is the Arrod series.
Arrod: has hues yellower than 7.5YR, has peak periods of precipitation in the spring, and has a typic ustic soil moisture regime.
GEOGRAPHIC SETTING:
Parent material: glaciofluvial deposits derived from metamorphic and sedimentary rocks
Landform: outwash plains
Slopes: 3 to 8 percent
Elevation: 6,600 to 7,200 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 Clapper, Tridell, Waterhill, Whitesage, and Wildmount series.
Clapper, Tridell, Waterhill, Whitesage, and Wildmount soils are all very deep and do not have a petrocalcic horizon.
DRAINAGE AND PERMEABILITY: Well drained, low to medium runoff, moderate permeability.
USE AND VEGETATION: The major uses are rangeland, wildlife habitat, and recreation. Potential native vegetation consists of Utah juniper and pinyon with an understory of bluebunch wheatgrass, prairie junegrass, black sagebrush and bluegrass. This soil has been correlated to the Upland Shallow Loam (Pinyon-Utah Juniper) - 047CY326UT range site in Utah.
DISTRIBUTION AND EXTENT: Northeastern Utah. LRR E, MLRA 47. 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 18 inches. (Bk2 and Bk3 horizons)
Mollic epipedon: The zone from 0 to 10 inches. (A and Bk1 horizons)
Calcic horizon: The zone from 10 to 18 inches. (Bk2 and Bk3 horizons)
Petrocalcic horizon: The zone from 18 to 24 inches. (Bkm horizon)
The cation exchange activity class was inferred from laboratory data from similar soils in the Uintah Area Soil Survey.
Classification was changed from shallow Petrocalcic Calciborolls to frigid, shallow Petrocalcic Calciustolls 11/98.
Taxonomic version: Eighth Edition, 1998.
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."