LOCATION MOYNIER UTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Fluvaquentic Endoaquolls
TYPICAL PEDON: Moynier loam, on a southeast facing, linear, 2 percent slope in riparian streambank vegetation at an elevation of 6,020 feet. (Colors are for moist soil unless otherwise noted.) When described on October 30, 1990 the soil was saturated to the surface.
Matted live and undecomposed roots ranging from 1 to 3 inches thick.
A1--0 to 8 inches; very dark gray (10YR 3/1) loam, gray (10YR 5/1) dry; moderate very fine granular structure; friable, moderately sticky and moderately plastic; many very fine and fine, common medium, few coarse roots; many very fine and fine tubular pores; slightly effervescent (4 percent calcium carbonate equivalent), carbonates are disseminated; moderately alkaline (pH 8.4); abrupt smooth boundary.
A2--8 to 18 inches; black (10YR 2/1) clay loam, very dark grayish brown (10YR 3/2) dry; moderate very fine and fine subangular blocky structure; firm, moderately sticky and moderately plastic; many very fine, common fine, few medium roots; many very fine and fine tubular pores; very slightly effervescent (2 percent calcium carbonate equivalent), carbonates are disseminated; common fine prominent strong brown (7.5YR 5/6) redoximorphic concentrations; slightly alkaline (pH 7.8); abrupt smooth boundary. (combined thickness of A horizon ranges from 15 to 24 inches thick)
BCg1--18 to 21 inches; dark brown (10YR 4/3) loamy sand, pale brown (10YR 6/3) dry; massive; very friable, nonsticky and nonplastic; few very fine, fine and medium roots; common very fine, few fine and medium tubular pores; few fine prominent strong brown (7.5YR 5/6) redoximorphic concentrations; slightly alkaline (pH 7.8); abrupt smooth boundary.
BCg2--21 to 26 inches; dark brown (10YR 3/3) clay loam, brown (10YR 5/3) dry; weak fine subangular blocky structure; firm, moderately sticky and moderately plastic; common very fine and fine, few medium roots; common very fine and fine tubular pores; many fine and medium prominent strong brown (7.5YR 5/8) redoximorphic concentrations, faint dark grayish brown (10YR 4/2) redoximorphic depletions; slightly alkaline (pH 7.8); clear wavy boundary.
BCg3--26 to 40 inches; very dark grayish brown (10YR 3/2) clay loam, grayish brown (10YR 5/2) dry; massive; very firm, very sticky and very plastic; common very fine and fine, few medium roots; common very fine and fine tubular pores; 2 less than 1 inch thick discontinuous layers of sandy loam and loamy sand within the horizon; common fine and medium prominent strong brown (10YR 5/8) redoximorphic concentrations, many fine and medium faint dark gray (10YR 4/1) redoximorphic depletions; moderately alkaline (pH 8.4); clear wavy boundary.
BCg4--40 to 46 inches; dark grayish brown (10YR 4/2) clay loam, pale brown (10YR 6/3) dry; massive; firm, moderately sticky and moderately plastic; few very fine and fine roots; common very fine, few fine tubular pores; very slightly effervescent (2 percent calcium carbonate equivalent), carbonates are disseminated; common fine prominent olive brown (2.5Y 4/4) redoximorphic concentrations, many fine and medium faint gray (10YR 5/1) redoximorphic depletions; slightly alkaline (pH 7.8); clear smooth boundary.
BCg5--46 to 52 inches; brown (7.5YR 4/3) sandy loam, light brown (7.5YR 6/4) dry; massive; very friable, nonsticky and nonplastic; few very fine and fine roots; few very fine and fine tubular pores; common fine and medium distinct brown (7.5YR 5/2) redoximorphic depletions; slightly alkaline (pH 7.8); gradual wavy boundary.
BCg6--52 to 60 inches; dark grayish brown (10YR 4/2) clay loam, pale brown (10YR 6/3) dry; massive; firm, moderately sticky and moderately plastic; few very fine and fine roots; few very fine and fine tubular pores; few fine prominent olive brown (2.5Y 4/4) redoximorphic concentrations, many fine and medium prominent gray (10YR 5/1) redoximorphic depletions; slightly alkaline (pH 7.8).
TYPE LOCATION: Uintah County, Utah; about 1 mile southwest of Whiterocks, Utah; located about 2,400 feet south and 2,300 feet east of the northwest corner of sec. 24, T. 1 N., R. 1 W., USBM; Whiterocks, Utah USGS quad; lat. 40 degrees 28 minutes 10 seconds N. and long. 109 degrees 56 minutes 43 seconds W., NAD 27
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is affected by a year-round water table that occurs from the surface to 1.5 feet. Aquic moisture regime.
Mean annual soil temperature: 44 to 47 degrees F.
Depth to redox concentrations: 5 to 15 inches
Depth to redox depletions: 0 to 5 inches
Depth to endosaturation: 0 to 1.5 feet to year round saturation
Thickness of the mollic epipedon: 15 to 24 inches
Particle-size control section: 27 to 35 percent clay
A horizon:
Value: 2 or 3 moist, 3 to 5 dry
Chroma: 1 or 2 dry
Calcium carbonate equivalent: 1 to 10 percent
Reaction: slightly alkaline or moderately alkaline
BCg horizon:
Hue: 7.5YR to 5Y
Value: 3 to 5 moist, 4 to 6 dry
Chroma: 0 to 3
Texture: loam or clay loam with thin layers of loamy sand or sandy loam
Calcium carbonate equivalent: 0 to 10 percent
Reaction: slightly alkaline or moderately alkaline
COMPETING SERIES: There are no series in this family, but possible competitors not updated to the Seventh Edition, 1996 keys are the Clunton, Fairbirch, and Hayspur series.
Clunton: has particle-size control section with less than 27 percent clay.
Fairbirch: are loamy-skeletal at 25 to 40 inches.
Hayspur: has manganese oxide concretions and are sandy-skeletal below 40 inches.
GEOGRAPHIC SETTING:
Parent material: alluvium derived from sedimentary and metamorphic rocks
Landform: flood plains
Slopes: 1 to 3 percent
Elevation: 5,900 to 6,200 feet
Mean annual air temperature: 42 to 45 degrees F.
Mean annual precipitation: 10 to 12 inches - evenly distributed throughout the year with a slight increase in late summer and fall.
Frost-free period: 90 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Gooseneck and the Wonsits series.
Gooseneck and Wonsits soils occur on flood plains and have sandy-skeletal particle-size control sections.
DRAINAGE AND PERMEABILITY: Very poorly drained, low runoff, slow permeability. These soils are occasionally flooded for long periods during the months of March to July.
USE AND VEGETATION: The major uses are wildlife habitat, rangeland, and recreation. The potential native plant community is willow, slender wheatgrass, rush, sedge, goldenrod, and sunflower. These soils have been correlated to Wet Fresh Streambank (Willow) - 034XY021UT in Utah.
DISTRIBUTION AND EXTENT: Northeastern 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 taken from a nearby geographic location.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 10 to 40 inches.
Mollic epipedon: The zone from 0 to 18 inches. (A1 and A2 horizons)
Redoximorphic features: The presence of redox concentrations and redox depletions from 8 to 60 inches.
Endosaturation: The presence of a saturated zone from 0 to 1.5 feet during the months of January to December.
The cation exchange activity class was inferred from laboratory data from similar soils in the Uintah Area Soil Survey.
This soil is at elevations typically associated with mesic temperature regimes, however, because of cool air drainage off of nearby mountains and the influence of cold mountain water it was placed in a frigid temperature regime.
Taxonomic version: Eighth Edition, 1998.