LOCATION HAZMAZ UTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Calcic Petrocalcids
TYPICAL PEDON: Hazmaz loam, on a south facing, linear, 2 percent slope in cropland at an elevation of 5,750 feet. (Colors are for dry soil unless otherwise noted.)
Ap1--0 to 5 inches; brown (7.5YR 5/4) loam, dark brown (7.5YR 3/3) moist; moderate very fine and fine subangular blocky structure; hard, very friable, slightly sticky and nonplastic; many very fine, common fine, few medium roots; common very fine and fine, few medium tubular pores; 5 percent gravel, 5 percent gravel sized hardpan fragments; very slightly effervescent (1 percent calcium carbonate equivalent), carbonates are disseminated and in hardpan fragments; moderately alkaline (pH 8.0); abrupt smooth boundary. (2 to 10 inches thick)
Ap2--5 to 10 inches; brown (7.5YR 5/4) loam, dark brown (7.5YR 4/3) moist; moderate medium subangular blocky structure parting to moderate very fine and fine subangular blocky; hard, friable, slightly sticky and slightly plastic; many very fine, common fine, few medium roots; many very fine and fine, few medium tubular pores; 5 percent gravel, 5 percent gravel sized hardpan fragments; very slightly effervescent (4 percent calcium carbonate equivalent), carbonates are disseminated and in hardpan fragments; moderately alkaline (pH 8.0); clear smooth boundary. (0 to 6 inches thick)
Bk1--10 to 15 inches; brown (7.5YR 5/4) loam, dark brown (7.5YR 4/3) moist; moderate medium subangular blocky structure parting to moderate very fine and fine subangular blocky; hard, friable, slightly sticky and slightly plastic; common very fine, few fine roots; many very fine and fine few medium tubular pores; 5 percent gravel, 5 percent gravel sized hardpan fragments; very slightly effervescent (3 percent calcium carbonate equivalent), carbonates are disseminated and segregated as common irregular fine and medium masses and concretions and in hardpan fragments; moderately alkaline (pH 8.0); abrupt smooth boundary. (0 to 9 inches thick)
Bk2--15 to 23 inches; light brown (7.5YR 6/4) gravelly loam, brown (7.5YR 5/4) moist; moderate medium subangular blocky structure parting to weak fine subangular blocky; hard, friable, moderately sticky and slightly plastic; common very fine roots; many very fine and fine, few medium tubular pores; 10 percent gravel, 15 percent gravel sized hard pan fragments; strongly effervescent (27 percent calcium carbonate equivalent), carbonates are disseminated and segregated as many irregular fine and medium masses and concretions and in hardpan fragments; moderately alkaline (pH 8.0); clear smooth boundary. (6 to 12 inches thick)
Bk3--23 to 31 inches; pink (7.5YR 8/4) very gravelly sandy clay loam, pink (7.5YR 7/4) moist; weak medium subangular blocky structure parting to weak very fine and fine subangular blocky; very hard, firm, moderately sticky and moderately plastic; few very fine roots; many very fine, common fine, few medium tubular pores; 40 percent gravel sized hardpan fragments; violently effervescent (45 percent calcium carbonate equivalent), carbonates are disseminated and segregated in hardpan fragments; moderately alkaline (pH 8.0); abrupt wavy boundary. (8 to 14 inches thick)
2Bkm--31 to 41 inches; indurated calcium carbonate cemented hardpan.
TYPE LOCATION: Uintah County, Utah; about 3 miles southeast of Whiterocks along the Whiterocks Bench; located about 2,200 feet west and 1,800 feet north of the southeast corner of sec. 33, T. 1 N., R. 1 E., USBM; Whiterocks, Utah USGS quad; lat. 40 degrees 26 minutes 16 seconds N. and long. 109 degrees 52 minutes 8 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. Aridic moisture regime bordering on ustic.
Mean annual soil temperature: 47 to 52 degrees F.
Depth to secondary calcium carbonate: 2 to 10 inches
Depth to calcic horizon: 9 to 21 inches
Depth to petrocalcic horizon: 20 to 40 inches
Particle-size control section: 18 to 35 percent clay and 15 to 35 percent gravel sized calcium carbonate hardpan fragments and gravel and cobbles of sandstone and quartzite origin
A horizon:
Hue: 5YR through 10YR
Value: 4 to 6 dry, 3 to 6 moist
Chroma: 2 to 6 moist dry or moist
Texture: loam or gravelly loam (10 to 27 percent clay)
Rock fragments: 0 to 35 percent
Calcium carbonate equivalent: 1 to 10 percent
Reaction: slightly alkaline to strongly alkaline
Bk (upper) horizon:
Hue: 5YR or 7.5YR
Value: 5 or 6 dry, 3 to 5 moist
Chroma: 4 to 6 dry, 3 or 4 moist
Texture: most commonly - loam, cobbly loam, or gravelly clay loam; less commonly - gravelly loam, sandy loam, or fine sandy loam
Rock fragments: 10 to 30 percent
Calcium carbonate equivalent: 1 to 15 percent
Reaction: slightly alkaline to strongly alkaline
Bk (lower) horizons:
Hue: 5YR or 7.5YR
Value: 5 to 8 dry, 4 to 7 moist
Chroma: 2 to 6 dry, 3 or 4 moist
Texture: most commonly - gravelly loam, gravelly clay loam, or very gravelly sandy clay loam; less commonly - cobbly loam, very gravelly loam, very cobbly loam, and very cobbly sandy loam
Rock fragments: averages 15 to 35 percent with individual horizons ranging higher
Calcium carbonate equivalent: averaging 15 to 40 percent with individual horizons ranging higher
Reaction: moderately alkaline or strongly alkaline
COMPETING SERIES: These are no other series in this family.
GEOGRAPHIC SETTING:
Parent material: eolian deposits over glaciofluvial deposits derived from sedimentary and quartzite rocks
Landform: structural benches
Slopes: 1 to 8 percent
Elevation: 5,600 to 6,700 feet
Mean annual air temperature: 45 to 49 degrees F.
Mean annual precipitation: 8 to 12 inches
Frost-free period: 110 to 140 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Abracon, Cobbra, Crib, Clapper, Pinetown, and Yarts series.
Abracon, Cobbra, Crib, Clapper, and Yarts soils are very deep and do not have petrocalcic horizons.
Pinetown soils are shallow.
DRAINAGE AND PERMEABILITY: well drained, low runoff, moderate and moderately slow permeability.
USE AND VEGETATION: The major uses are irrigated cropland, irrigated pasture, and rangeland. Potential native vegetation consists of Wyoming big sagebrush, Indian ricegrass, galleta, bottlebrush squirreltail and needleandthread. These soils are correlated to Semidesert Loam (Wyoming Big Sagebrush) - 034XY212UT range sites in Utah.
DISTRIBUTION AND EXTENT: Northeast 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 is coined.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 10 to 31 inches.
Ochric epipedon: The zone from 0 to 10 inches. (Ap1, Ap2 horizons)
Calcic horizon: The zone from 15 to 31 inches. (Bk1, Bk2 horizons)
Petrocalcic horizon: The zone beginning at 31 inches. (2Bkm horizon)
The cation exchange activity class was inferred from laboratory data from similar soils in the Uintah Area Soil Survey.
Taxonomic Version: Eighth Edition, 1998.