LOCATION LANVER                  UT+WY

Established Series
Rev. GWL/CSW/JWB
04/2011

LANVER SERIES

The Lanver series consists of moderately deep, well drained, moderately permeable soils that formed in eolian deposits over residuum weathered from sandstone and shale. Lanver soils are on plateaus, structural benches and cuestas. Slopes are 2 to 15 percent. Average annual precipitation is about 10 inches and the mean annual air temperature is 47 degrees F.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Sodic Ustic Haplocalcids

TYPICAL PEDON: Lanver very channery sandy loam, in rangeland. (Colors are for air-dry soil unless otherwise noted) The surface is covered by 55 percent channers.

A--0 to 3 inches; pale brown (10YR 6/3) very channery fine sandy loam, brown (10YR 4/3) moist; moderate thin and medium platy structure parting to weak very fine subangular blocky; slightly hard, very friable, nonsticky and nonplastic; few fine, medium, coarse, common very fine roots; few medium, common very fine and fine vesicular pores; 5 percent channers, 20 percent angular gravel; slightly effervescent (12 percent calcium carbonate equivalent), carbonates are disseminated; moderately alkaline (pH 8.3); abrupt smooth boundary. (2 to 5 inches thick)

Bk--3 to 13 inches; light yellowish brown (10YR 6/4) gravelly fine sandy loam, dark yellowish brown (10YR 4/4) moist; moderate fine and medium subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; many very fine, common fine and medium roots; few medium and common very fine and fine tubular pores; 5 percent flagstones, 5 percent channers and 15 percent angular gravel; strongly effervescent (16 percent calcium carbonate equivalent), carbonates are disseminated and segregated as less than 1 mm thick coatings around rocks; moderately alkaline (pH 8.4); clear wavy boundary. (4 to 11 inches thick)

Bkn1--13 to 24 inches; light gray (2.5Y 7/2) very flaggy sandy loam, light yellowish brown (2.5Y 6/4) moist; massive; slightly hard, very friable, nonsticky and nonplastic; few medium and common fine and very fine roots; few medium and common very fine tubular pores; 10 percent stones, 30 percent channers and 15 percent flagstones; strongly effervescent (26 percent calcium carbonate equivalent), carbonates are disseminated and segregated as masses and less than 1 mm thick coatings around rocks; sodium absorption ratio is 17; very strongly alkaline (pH 9.2); clear irregular boundary. (6 to 11 inches thick)

Bkn2--24 to 31 inches; pale yellow (2.5Y 7/4) very channery coarse sandy loam, light olive brown (2.5Y 5/4) moist; massive; soft, very friable, nonsticky and nonplastic; few fine and common very fine roots; few fine and common very fine tubular pores; 10 percent flagstones, 45 percent channers; slightly effervescent (14 percent calcium carbonate equivalent), carbonates are disseminated and segregated as few fine nodules and less than 1 mm thick coatings on rock fragments; sodium absorption ratio is 29; very strongly alkaline (pH 8.5); clear wavy boundary. (0 to 17 inches thick)

Bkny--31 to 36 inches; light gray (2.5Y 7/2) very channery sandy loam, light olive brown (2.5Y 5/4) moist; massive; soft, very friable, nonsticky and nonplastic; few very fine and fine roots; few fine and common very fine tubular pores; 5 percent flagstones, 35 percent channers; very slightly effervescent (2 percent calcium carbonate equivalent), carbonates are disseminated and segregated as less than 1 mm thick coatings on rock fragments; common medium gypsum veins, 41 percent gypsum; sodium absorption ratio is 30; moderately alkaline (pH 8.2); clear smooth boundary. (2 to 5 inches thick)

R--36 to 40 inches; sandstone.

TYPE LOCATION: Uintah County, Utah; about 15 miles east and 28 miles south of Ouray; 1,000 feet west and 2,300 feet south of the NE corner of sec. 15, T. 11 S., R. 21 E. SLBM; Big Pack Mountain SE, Utah USGS Quadrangle; 39 degrees 51 minutes 42 seconds north latitude and 109 degrees 32 minutes 49 seconds west longitude, NAD 27.

RANGE IN CHARACTERISTICS:
Soil moisture: The moisture control section is affected by precipitation that falls evenly through the year with a slight increase in late summer and fall. The soil moisture regime is aridic bordering on ustic.
Mean annual soil temperature: 47 to 52 degrees F.
Depth to calcic: 3 to 16 inches
Depth to gypsum accumulations: 16 to 36 inches
Depth to lithic contact: 20 to 40 inches to sandstone and shale

Particle-size control section (weighted average): 8 to 18 percent clay and 35 to 60 percent sandstone channers, gravel and flagstones.

A horizon:
Hue: 7.5YR or 10YR
Value: 5 through 7 dry, 4 or 5 moist
Chroma: 3 or 4 dry or moist
Calcium carbonate equivalent: 1 to 15 percent
Sodium absorption ratio: 0 to 5

Bk horizon:
Hue: 7.5YR or 10YR
Value: 5 or 6 dry, 4 or 5 moist
Chroma: 3 or 4 dry or moist
Texture: very gravelly fine sandy loam, gravelly sandy loam, channery loam, or gravelly loam
Calcium carbonate equivalent: 5 to 20 percent
Sodium absorption ratio: 0 to 5

Bkn horizon:
Hue: 7.5 YR to 2.5Y
Value: 5 through 8 dry, 4 through 7 moist
Chroma: 2 through 4 dry or moist
Texture: very flaggy sandy loam, very channery sandy loam, very gravelly sandy loam, very channery coarse sandy loam or very gravelly fine sandy loam
Calcium carbonate equivalent: 10 to 30 percent
Sodium absorption ratio: 15 to 30
Reaction: strongly alkaline or very strongly alkaline

Bkny horizon:
Hue: 7.5YR to 2.5Y
Value: 5 through 8 dry, 4 through 7 moist
Chroma: 2 through 4 dry or moist
Calcium carbonate equivalent: 2 to 15 percent
Sodium absorption ratio: 15 to 30
Gypsum: 20 to 45 percent; Note--this horizon does not make the minimum thickness requirement for a gypsic horizon.
Reaction: moderately alkaline or strongly alkaline

COMPETING SERIES: There are no other competing series in this family.

GEOGRAPHIC SETTING:
Parent material: eolian deposits and/or slope alluvium over residuum derived from sandstone, shale and conglomerate
Landform: plateaus, structural benches, cuestas
Elevation: 5,100 to 6,200 feet
Slope: 2 to 15 percent
Mean annual precipitation: 8 to 12 inches
Mean annual air temperature: 45 to 50 degrees F.
Frost-free period: 110 to 150 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Casmos, Mikim, Motto, Pherson, Uendal and Walknolls soils. Casmos, Motto, and Walknolls soils are less than 20 inches deep. Mikim and Pherson soils do not have bedrock at depths less than 40 inches. Uendal soils have coarse-loamy particle-size control sections. All of these soils do not have a calcic horizon.

DRAINAGE AND PERMEABILITY: Well drained; low and medium runoff; moderate permeability.

USE AND VEGETATION: These soils are used mainly for rangeland, wildlife habitat and recreation. Native vegetation is mainly Wyoming big sagebrush, shadscale, galleta, needleandthread, and bottlebrush squirreltail. At the type location this soil has been correlated to Semidesert Gravel Loam (Wyoming Big Sagebrush) - 034XY206UT range site in Utah.

DISTRIBUTION AND EXTENT: Northeastern and central Utah. LRR D, MLRA 34B. The series is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana

SERIES ESTABLISHED: Daggett County, Utah, Henrys Fork Survey Area, 1990.

REMARKS: Diagnostic horizons and features in this pedon include:

Particle-size control section: The zone from 10 to 31 inches. (Bk, Bkn1, Bkn2, and Bkny horizons)

Ochric epipedon: The zone from 0 to 3 inches. (A horizon)

Calcic horizon: The zone from 13 to 31 inches. (Bkn1 and Bkn2 horizons)

Sodic feature: SAR values of 15 to 30 in the zone from 13 to 31 inches. (Bkn and Bkny horizons)

Gypsum accumulation: The presence of secondary gypsum in the zone from 31 to 36 inches. (Bkny horizon)

Lithic contact: The contact with sandstone bedrock at 36 inches. (R layer)

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."

In March 1996 the classification was changed from Ustic Haplocalcids to Sodic Ustic Haplocalcids.

The Lanver pedon used in the Henrys Fork Survey Area no longer fits the current concept of the Lanver series. That pedon does not have sodium and gypsum accumulations.

Taxonomic version: Eleventh Edition, 2010.

ADDITIONAL DATA: This profile was sampled by the National Soil Survey Laboratory, S80UT-047-007.

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National Cooperative Soil Survey
U.S.A.