LOCATION LONGABAUGH              UT

Established Series
Rev. CSW/RJL/JWB
03/2011

LONGABAUGH SERIES

The Longabaugh series consists of very deep, well drained soils that formed in colluvium over residuum derived from calcareous sandstone and shale. Longabaugh soils are on mountain slopes. Slopes range from 50 to 70 percent. Mean annual precipitation is about 73 cm and the mean annual temperature is about 2.5 degrees C.

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Typic Haplocryolls

TYPICAL PEDON: Longabaugh very stony fine sandy loam, on a northwest facing, convex, 70 percent slope in Douglas-fir woodland at an elevation of 2,489 meters. (Colors are for dry soil unless otherwise noted.) The surface is covered by 2 percent boulders, 15 percent stones, 15 percent cobbles, 5 percent channers and 15 percent gravel.

A1--0 to 11 cm; dark grayish brown (10YR 4/2) very stony fine sandy loam, very dark brown (10YR 2/2) moist; 16 percent clay; weak fine granular structure; very friable, soft, slightly sticky, slightly plastic; common coarse, medium, fine and very fine roots; many very fine interstitial and tubular pores; 2 percent boulders, 5 percent stones, 10 percent flagstones, 15 percent cobbles, 15 percent gravel; noneffervescent; slightly alkaline (pH 7.7); abrupt wavy boundary.

A2--11 to 34 cm; grayish brown (10YR 5/2) very stony loam, very dark grayish brown (10YR 3/2) moist; 18 percent clay; weak fine subangular blocky structure; very friable, slightly hard, slightly sticky, slightly plastic; common coarse, medium, fine and very fine roots; many very fine tubular and interstitial pores; 15 percent stones, 15 percent cobbles, 5 percent channers, 15 percent gravel; slightly effervescent, carbonates are finely disseminated; slightly alkaline (pH 7.8); clear wavy boundary. (Combined thickness of the A horizons is 23 to 34 cm)

Bk--34 to 58 cm; light yellowish brown (10YR 6/4) very cobbly loam, yellowish brown (10YR 5/4) moist; 22 percent clay; weak medium and fine subangular blocky structure; friable, slightly hard, slightly sticky, moderately plastic; common coarse, medium and fine and few fine roots; common fine and very fine tubular and interstitial pores; 5 percent stones, 20 percent cobbles, 5 percent channers, 10 percent gravel; strongly effervescent, carbonate coats on rock fragments, carbonates are finely disseminated in matrix; moderately alkaline (pH 8.3); clear wavy boundary.

BCk--58 to 118 cm; pale brown (10YR 6/3) very cobbly loam, dark grayish brown (10YR 4/2) moist; 22 percent clay; weak medium and fine subangular blocky structure; friable, slightly hard, slightly sticky, moderately plastic; common coarse, medium and very fine and few fine roots; common fine and very fine interstitial and tubular pores; 3 percent stones, 15 percent cobbles, 10 percent channers, 10 percent gravel; strongly effervescent, carbonate coats on rock fragments, carbonates are finely disseminated in matrix; moderately alkaline (pH 8.4); gradual wavy boundary. (Combined thickness of the Bk and BCk horizons is 40 to 110 cm)

C--118 to 175 cm; light brownish gray (10YR 6/2) very cobbly loam, dark grayish brown (10YR 4/2) moist; 23 percent clay; massive; friable, hard, slightly sticky, moderately plastic; few coarse, medium and fine common very fine roots; common fine and very fine irregular pores; 20 percent cobbles, 15 percent channers, 20 percent gravel; strongly effervescent, carbonates are finely disseminated; moderately alkaline (pH 8.4); abrupt wavy boundary.

R--175 to 185 cm; calcareous sandstone bedrock.

TYPE LOCATION: Emery County, Utah; about 3.2 kilometers (2 miles) west-northwest of Mohrland ghost town; located about 2,425 feet east and 1,500 feet south of the northwest corner of sec. 8, T. 16 S., R. 8 E.; Hiawatha USGS quad; lat. 39 degrees 26 minutes 57 seconds N. and long. 111 degrees 2 minutes 55 seconds W., NAD 83

RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control is usually moist throughout the year, with occasional intermittent drying during the summer. Udic bordering ustic moisture regime.
Mean annual soil temperature: 2.2 to 5.0 degrees C
Mean summer soil temperature: 5.6 to 10.5 degrees C
Depth to lithic contact: 152 to greater than 205 cm to sandstone bedrock
Depth to secondary calcium carbonate: 34 to 64 cm
Depth to cambic horizon: 34 to 53 cm
Thickness of the mollic epipedon: 23 to 34 cm
Thickness of the cambic horizon: 66 to 133 cm
Thickness of the layer of secondary carbonates: 40 to 110 cm

Particle-size control section (weighted averages):
Clay content: 18 to 24 percent
Rock fragment content: 35 to 60 percent, dominantly cobbles and stones

A horizon:
Hue: 7.5YR or 10YR
Value: 4 or 5 dry; 2 or 3 moist
Chroma: 2 to 4 dry or moist
Texture: very stony fine sandy loam, very stony loam
Clay content: 15 to 24 percent
Rock fragments: 35 to 60 percent boulders, stones, cobbles and gravel
Calcium carbonate equivalent: 0 to 5 percent
EC (mmhos/cm): 0 to 2
Reaction: neutral or slightly alkaline

Bw horizon (when present):
Hue: 7.5YR or 10YR
Value: 6 or 7 dry; 4 or 5 moist
Chroma: 2 to 6 dry or moist
Texture: very gravelly or very stony loam
Rock fragments: 35 to 60 percent stones, cobbles and gravel
Calcium carbonate equivalent: 2 to 14 percent
EC (mmhos/cm): 0 to 2
Reaction: slightly alkaline or moderately alkaline

Bk, BCk horizon:
Hue: 7.5YR or 10YR
Value: 5 to 7 dry; 4 or 5 moist
Chroma: 2 to 6 dry or moist
Texture: very cobbly loam
Clay content: 18 to 24 percent
Rock fragments: 35 to 60 percent stones, cobbles and gravel
Calcium carbonate equivalent: 1 to 14 percent
EC (mmhos/cm): 0 to 2
Reaction: moderately alkaline

C horizon:
Hue: 7.5YR or 10YR
Value: 5 to 7 dry; 4 or 5 moist
Chroma: 2 to 6 dry or moist
Texture: very cobbly loam, very bouldery fine sandy loam
Clay content: 12 to 25 percent
Rock fragments: 35 to 60 percent boulders, stones, cobbles, and gravel
Pararock fragments: 0 to 20 percent parachanners
Calcium carbonate equivalent: 1 to 12 percent
EC (mmhos/cm): 0 to 2
Reaction: moderately alkaline

COMPETING SERIES: These are the Broad Canyon, Kamack, Midfork and Sawpit series. Broad Canyon soils formed in glacial till and have a lithologic discontinuity. Kamack soils have bedrock at a depth of 102 to 152 cm (40 to 60 inches) and do not have a layer of secondary carbonates. Midfork soils do not have a cambic horizon and have peak periods of precipitation in the spring and early summer. Sawpit soils are moderately well drained and do not have a layer of secondary carbonates.

GEOGRAPHIC SETTING:
Parent material: colluvium over residuum derived from calcareous sandstone and shale
Landform: mountain slopes
Slopes: 50 to 70 percent
Elevation: 2,316 to 3,048 meters
Mean annual temperature: 1.1 to 3.9 degrees C
Mean annual precipitation: 56 to 89 cm
Precipitation pattern: Wettest months are October to May and driest months are June to September.
Frost-free period: 40 to 70 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aagard, Comodore, Gilluly, and Northorn series. The Aagard soils have argillic and calcic horizons and are on less sloping mountainsides under aspen. The Comodore soils are shallow to bedrock and are on ridges under Douglas-fir. The Gilluly soils have argillic horizons and are on less sloping mountainsides under Douglas-fir. The Northorn soils have an argillic horizon and are on concave, less sloping mountainsides under Douglas-fir.

DRAINAGE AND PERMEABILITY: well drained, high runoff, moderate permeability.

USE AND VEGETATION: Used for timber and wildlife habitat. Native vegetation consists of Douglas-fir, mountainmahogany, aspen, Oregongrape, Utah serviceberry, Salina wildrye and bluegrass. Utah correlates this soil to High Mountain Very Steep (Douglas-Fir) R048AY53OUT ecological site.

DISTRIBUTION AND EXTENT: Mountains of central Utah, Wasatch Mountains - North; LRR E, MLRA 47A; small extent. About 5,700 acres (2,300 hectares) in Emery County, Utah.

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

SERIES ESTABLISHED: Emery County, Utah, Emery Area, Utah, 2011, Parts of Emery, Carbon, Grand and Sevier Counties. The name commemorates a regional outlaw also known as the Sundance Kid.

REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Series control section: The zone from 0 to 200 cm.
Particle-size control section: The zone from 25 to 100 cm. (parts of the A2, Bk and BCk horizons)
Mollic epipedon: The zone from 0 to 34 cm. (A horizons)
Cambic horizon: The zone from 34 to 118 cm. (Bk and BCk horizons)
Horizon with secondary carbonates: The zone from 34 to 118 cm. (Bk and BCk horizons)
Lithic contact: The contact with calcareous sandstone bedrock at 175 cm. (R horizon)

A continuous or discontinuous layer of partially decomposed twigs, needles and leaves may be present in some pedons.

The assignment of the cation-exchange activity class is inferred from lab data from similar soils in the surrounding area.

Taxonomic Version: Classified according to Keys to Soil Taxonomy, Eleventh Edition, 2011.

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National Cooperative Soil Survey
U.S.A.