LOCATION MILLBURNE WY
Tentative Series
Rev. AJC/CAP/TWH
06/2011
MILLBURNE SERIES
The Millburne series consists of very deep, moderately well drained soils that formed in outwash. These soils are on strath terraces or outwash terraces. Slopes are 0 to 2 percent. Mean annual precipitation is about 28 cm (11 inches), and mean annual temperature is about 5 degrees C (40 degrees F).
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Oxyaquic Argiustolls
TYPICAL PEDON: Millburne sandy loam, on a 1 percent slope in irrigated hayland at an elevation of 2070 meters (6820 feet); (colors are for dry soil unless otherwise noted). When described on August 4, 2005 the soil was dry to 10 cm and moist below.
A--0 to 10 cm (0 to 4 inches); very dark grayish brown (10YR 3/2) broken face, sandy loam, very dark brown (10YR 2/2) broken face, moist; weak fine granular structure; soft, very friable, nonsticky, nonplastic; many fine roots throughout; many fine moderate continuity interstitial pores; 3 percent gravel; noneffervescent; neutral (pH 7.1); clear smooth boundary. (5 to 13 cm thick (2 to 5 inches))
Bt--10 to 30 cm (4 to 12 inches); brown (7.5YR 4/3) broken face, fine sandy loam, dark brown (7.5YR 3/3) broken face, moist; moderate medium prismatic structure parting to moderate fine and medium subangular blocky; slightly hard, very friable, slightly sticky, slightly plastic; many fine roots throughout; many fine moderate continuity tubular pores; few discontinuous faint dark brown (7.5YR 3/2), moist, clay films on all faces of peds; 5 percent fine distinct irregular dark yellowish brown (10YR 4/6) masses of oxidized with clear boundaries throughout; 5 percent gravel, 2 percent cobbles; noneffervescent; strongly alkaline (pH 8.6); clear wavy boundary. (15 to 46 cm thick (6 to 18 inches))
Bk1--30 to 51 cm (12 to 20 inches); light gray (10YR 7/2) broken face, sandy clay loam, pale brown (10YR 6/3) broken face, moist; moderate fine and medium subangular blocky structure; slightly hard, very friable, slightly sticky, slightly plastic; many fine roots throughout; many fine moderate continuity tubular pores; common fine distinct irregular moderately cemented light gray (10YR 7/2) carbonate concretions throughout and common fine distinct irregular moderately cemented light gray (10YR 7/2) carbonate concretions on bottom of rock fragments; 5 percent gravel, 2 percent cobbles; strongly effervescent; 25 percent calcium carbonate equivalent; strongly alkaline (pH 8.6); clear wavy boundary. (0 to 23 cm thick (0 to 9 inches))
2Bk2--51 to 84 cm (20 to 33 inches); pinkish gray (7.5YR 7/2) broken face, very cobbly sandy loam, light brown (7.5YR 6/3) broken face, moist; moderate fine and medium subangular blocky structure; soft, very friable, slightly sticky, slightly plastic; common fine roots throughout; many fine moderate continuity tubular pores; few discontinuous distinct light gray (10YR 7/2) carbonate coats on bottom surfaces of rock fragments; common fine distinct irregular moderately cemented light gray (10YR 7/2) carbonate concretions throughout and common fine distinct irregular moderately cemented light gray (10YR 7/2) carbonate concretions on bottom of rock fragments; 25 percent gravel, 20 percent cobbles, 5 percent stones; violently effervescent; 23 percent calcium carbonate equivalent; strongly alkaline (pH 8.6); gradual wavy boundary. (15 to 38 cm thick (6 to 15 inches))
2Bk3--84 to 112 cm (33 to 44 inches); reddish brown (5YR 5/3) broken face, extremely cobbly loamy sand, reddish brown (5YR 4/3) broken face, moist; massive; soft, very friable, nonsticky, nonplastic; common fine roots throughout; few discontinuous distinct light gray (10YR 7/2) carbonate coats on bottom surfaces of rock fragments; 30 percent gravel, 30 percent cobbles, 5 percent stones; strongly effervescent; 9 percent calcium carbonate equivalent; strongly alkaline (pH 8.6); gradual wavy boundary. (15 to 30 cm thick (6 to 12 inches))
2Bk4--112 to 203 cm (44 to 80 inches); reddish brown (5YR 5/3) broken face, extremely cobbly loamy sand, reddish brown (5YR 4/3) broken face, moist; massive; loose, nonsticky, nonplastic; 30 percent gravel, 35 percent cobbles, 5 percent stones; strongly effervescent; strongly alkaline (pH 8.6).
TYPE LOCATION: Uinta County, Wyoming; about one mile northwest of Mountain View; about 500 feet south and 1,000 feet east of the northwest corner of section 14, T. 15 N., R. 115 W.; Mountain View USGS quad; latitude 41 degrees 17 minutes 3.80 seconds north and longitude 110 degrees 21 minutes 4.58 seconds west, NAD 83.
RANGE IN CHARACTERISTICS:
Soil moisture: The moisture control section is usually moist in late winter and spring, dry in early summer and fall, and intermittently moist in late summer. Aridic moisture regime bordering on ustic.
Mean annual soil temperature: 4.4 to 6.7 degrees C (40 to 44 degrees F)
Mean summer soil temperature: 16.7 to 18.9 degrees C (62 to 66 degrees F)
Thickness of mollic epipedon: 18 to 38 cm (7 to 15 inches)
Depth to episaturation (irrigation induced): top depth - 0 to 46 cm (0 to 18 inches), bottom depth: 30 to 91 cm (12 to 36 inches)
Depth to argillic horizon: 5 to 13 cm (2 to 5 inches)
Depth to calcic horizon: 25 to 89 cm (10 to 35 inches)
Depth to 2Bk horizon containing concretions: 38 to 89 cm (15 to 35 inches)
A horizon (an Ap horizon in some pedons)
Hue: 7.5YR or 10YR
Value: 3 to 5 dry, 2 or 3 moist
Chroma: 1 to 3, dry or moist
Rock fragment content: 0 to 15 percent
Reaction: neutral or slightly alkaline (pH 6.6 to 7.8)
Electrical conductivity: 0 to 2 mmhos/cm
Bt horizon (includes a Btk in some pedons):
Hue: 5YR, 7.5YR, or 10YR
Value: 3 to 5 dry, 2 to 4 moist
Chroma: 2 to 4, dry or moist
Redoximorphic concentrations: few or common, distinct or prominent
Texture: fine sandy loam, gravelly fine sandy loam, gravelly sandy clay loam
Clay content: 18 to 35 percent
Rock fragment content: 5 to 30 percent
Reaction: neutral to strongly alkaline (pH 6.6 to 9.0)
Electrical conductivity: 0 to 2 mmhos/cm
Sodium adsorption ratio: 0 to 10
Bk horizon
Hue: 5YR, 7.5YR, or 10YR
Value: 4 to 7 dry, 3 to 6 moist
Chroma: 2 to 4, dry or moist
Texture: sandy loam, sandy clay loam, or clay loam; or their gravelly or very gravelly modifiers
Clay content: 18 to 35 percent
Rock fragment content: 5 to 60 percent
Carbonate concretion and nodule content: 0 to 15 percent
Reaction: moderately alkaline or strongly alkaline (pH 7.9 to 9.0)
Calcium carbonate equivalent: 5 to 30 percent
Electrical conductivity: 0 to 2 mmhos/cm
Sodium adsorption ratio: 0 to 10
2Bk horizon, upper part
Hue: 5YR, 7.5YR, or 10YR
Value: 4 to 7 dry, 3 to 6 moist
Chroma: 2 to 4, dry or moist
Texture: very cobbly sandy loam, extremely cobbly sand, extremely cobbly loamy coarse sand, extremely cobbly loamy sand
Clay content: 3 to 15 percent
Rock fragment content: 35 to 80 percent
Carbonate concretion and nodule content: 10 to 30 percent
Reaction: moderately alkaline or strongly alkaline (pH 7.9 to 9.0)
Calcium carbonate equivalent: 5 to 30 percent
Electrical conductivity: 0 to 2 mmhos/cm
Sodium adsorption ratio: 0 to 8
2Bk horizon, lower part (2BCk or 2C in some pedons)
Hue: 5YR, 7.5YR, or 10YR
Value: 4 to 7 dry, 3 to 5 moist
Chroma: 3 or 4, dry or moist
Texture: extremely cobbly loamy sand, extremely cobbly sand, extremely cobbly loamy coarse sand
sand, loamy sand, loamy coarse sand, or coarse sand or their very to extremely gravelly or cobbly modifiers
Clay content: 0 to 10 percent
Rock fragment content: 60 to 80 percent
Reaction: moderately alkaline or strongly alkaline (pH 7.9 to 9.0)
Calcium carbonate equivalent: 1 to 10 percent
Electrical conductivity: 0 to 2 mmhos/cm
Sodium adsorption ratio: 0 to 6
COMPETING SERIES: This is the
Chivers (UT) series.
Chivers soils have endosaturation at depths of 1.5 to 3.5 feet throughout the year and have a typic ustic moisture regime.
GEOGRAPHIC SETTING:
Landform: strath terraces, outwash terraces
Parent material: outwash
Elevation: 2,042 to 2,286 meters (6,700 to 7,500 feet)
Slope: 0 to 2 percent
Mean annual precipitation: 229 to 381 millimeters (9 to 15 inches)
Mean annual air temperature: 3.9 to 6.1 degrees C (39 to 43 degrees F)
Frost-free period: 60 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS:
These are the Urie soils. Urie soils occur on similar landforms as Millburne and have loamy-skeletal control sections.
DRAINAGE AND PERMEABILITY: Moderately well drained due to surface irrigation. Permeability is moderate in the solum, slow or very slow in the 2Bk horizon, and very rapid in the lower part. Runoff is negligible to low.
USE AND VEGETATION: These soils are used principally as irrigated hayland and pasture. The historical native plant community is mainly Wyoming big sagebrush, needleandthread, bluebunch wheatgrass, and Indian ricegrass.
DISTRIBUTION AND EXTENT: Present known distribution limited to the southwestern part of Wyoming. MLRA 34A. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Uinta County Area, Wyoming, 1964. Series name taken from a small town in Uinta County.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: from 0 to 30 cm (0 to 12 inches) (A, Bt horizons)
Argillic horizon: from 10 to 30 cm (4 to 12 inches) (Bt horizon)
Calcic horizon: from 30 to 203 cm (12 to 40 inches) (Bk1, Bk2, 2Bk2, 2Bk3, 2Bk4 horizons). The calcic horizon is not a hard indurated petrocalcic horizon, it is not continuously cemented. It is a discontinuous layer that consists of cemented materials that offer a distinct resistance to digging implements and water movement. It has irregular thickness and cementation characteristics. The cemented parts range from extremely weakly to strongly cemented. This horizon is similar to the partially cementated horizons in the Petronodic subgroups of Aridisols.
Oxyaquic feature: episaturation and redoximorphic concentrations in the 10 to 30 cm layer (4 to 12 inches) (Bt horizon). Saturation is entirely from surface irrigation. Because the irrigation has caused redox features in the pedon, the wetness was considered part of the soil that is classified.
Particle-size control section: the zone from 10 to 30 cm (4 to 10 inches) (entire argillic horizon)
Series control section: the zone from 0 to 200 cm.
The solum is assumed to contain some carbonates added from irrigation water.
The 6/2011 revision moves the type location to a pedon that represents the series concept that was developed during the initial soil survey of the Uinta County Area, 2003 to 2010. This series was originally a fine-loamy over sandy or sandy-skeletal, mixed Borollic Haplargids; then was updated to fine-loamy over sandy or sandy-skeletal, mixed, superactive, frigid Ustic Calciargids. The 06/2011 revision changes the classification to fine-loamy, mixed, superactive, frigid Oxyaquic Argiustolls.
ADDITIONAL DATA: This pedon was sampled for NSSL, soil survey sample number S06WY041-004.
National Cooperative Soil Survey
U.S.A.