LOCATION HAROL UT

Established Series
Rev. JJC/RJL/JWB
04/2011

HAROL SERIES

The Harol series consists of very deep, well drained soils that formed in colluvium and slope alluvium from basic and intermediate igneous and sedimentary rocks. Harol soils occur on mountain slopes. Slopes range from 2 to 60 percent. The mean annual precipitation is about 15 inches (381 mm) and the mean annual air temperature is about 41 degrees F (5.0 degrees C).

TAXONOMIC CLASS: Loamy-skeletal over sandy or sandy-skeletal, mixed, superactive, frigid Typic Argiustolls

TYPICAL PEDON: Harol very cobbly loam - rangeland. (Colors are for dry soil unless otherwise noted)

A--0 to 5 inches (0 to 13 cm); dark brown (10YR 3/3) extremely cobbly loam, very dark brown (10YR 2/2) moist; moderate medium granular structure; hard, friable, slightly sticky and slightly plastic; common very fine and fine roots; common fine and medium tubular pores; 20 percent gravel, 30 percent cobbles, 10 percent stones; noneffervescent; neutral (pH 7.0); clear smooth boundary. (5 to 10 inches (10 to 25 cm) thick)

Bt1--5 to 9 inches (13 to 23 cm); brown (7.5YR 4/2) very cobbly clay loam, dark brown (7.5YR 3/2) moist; moderate medium angular blocky structure; very hard, firm, moderately sticky and moderately plastic; common fine and very fine, few medium roots; common fine and medium tubular pores; few thin clay films; 20 percent gravel, 15 percent cobbles, 2 percent stones; noneffervescent; neutral (pH 7.2); abrupt smooth boundary.

Bt2--9 to 16 inches (23 to 40 cm); brown (7.5YR 5/3) very cobbly clay loam, dark brown (7.5YR 3/2) moist; moderate coarse angular blocky structure; very hard, firm, moderately sticky and moderately plastic; common fine, very fine, and few medium roots; common fine and medium tubular pores; few thin clay films; 20 percent gravel, 15 percent cobbles, 2 percent stones; noneffervescent; neutral (pH 7.2); clear smooth boundary.

Bt3--16 to 25 inches (40 to 64 cm); brown (10YR 5/3) very cobbly clay loam, dark brown (10YR 3/3) moist; moderate coarse angular blocky structure; very hard, firm, moderately sticky and moderately plastic; few fine roots; few fine tubular pores; few thin clay films; 20 percent gravel, 20 percent cobbles, 2 percent stones; noneffervescent; slightly alkaline (pH 7.4); clear wavy boundary. (combined thickness of the Bt horizons is 15 to 30 inches (38 to 76 cm))

2C1--25 to 40 inches (64 to 102 cm); brown (10YR 5/3) extremely cobbly loamy sand, dark brown (10YR 3/3) moist; single grain; slightly cemented, very friable; few fine roots; few interstitial pores; 30 percent gravel, 30 percent cobbles, 5 percent stones; noneffervescent; slightly alkaline (pH 7.4); clear smooth boundary. (15 to 23 inches (38 to 58 cm) thick)

2C2--40 to 60 inches (102 to 152 cm); pale brown (10YR 6/3) extremely cobbly sand, brown (10YR 4/3) moist; single grain; loose; few fine roots; few fine interstitial pores; 30 percent gravel, 30 percent cobbles, 5 percent stones; noneffervescent; slightly alkaline (pH 7.4).

TYPE LOCATION: Garfield County, Utah; about 8 miles (12.9 km) north, 1/2 mile (0.8 km) west of Bear Valley Junction; located about 2,000 feet (610 m) north, 1,900 feet (580 m) east of the southwest corner of section 28, T. 31 S., R. 5 W.; Fremont Pass USGS quad; lat. 38 degrees 5 minutes 9 seconds N. and long. 112 degrees 25 minutes 25 seconds W., NAD 83

RANGE IN CHARACTERISTICS:
Soil moisture: Usually moist in some part during the late winter and spring and peiodically throughout the summer and early fall due to convection storms. (Ustic soil moisture regime.)
Mean annual soil temperature: 42 to 44 degrees F (4.5 to 8.0 degrees C)
Mean summer soil temperature: 59 to 61 degrees F (15.0 to 16.1 degrees C)
Depth to lithologic discontinuity: 20 to 40 inches (51 to 102 cm)
Thickness of the mollic epipedon: 10 to 16 inches (25 to 40 cm)

Particle-size control section (weighted averages):
Clay content: 28 to 35 percent in upper part; 0 to 5 percent in the lower part.
Fine sand and coarser sand content: 15 to 50 percent in the upper part.
Rock fragment content: 35 to 65 percent; mainly cobbles and gravel.

A horizon:
Value: 3 or 4 dry, 2 or 3 moist
Chroma: 2 or 3 dry or moist
Texture: cobbly loam to extremely cobbly loam or gravelly loam

Bt horizons:
Hue: 10YR or 7.5YR
Value: 4 or 5 dry, 2 to 4 moist
Chroma: 2 to 4 dry, 2 to 4 moist
Texture: very gravelly clay loam, extremely gravelly clay loam or very cobbly clay loam; subhorizons of cobbly clay are in some pedons
Rock fragments: 35 to 65 percent
Clay content: 28 to 35 percent
Reaction: neutral or slightly alkaline

2C horizon:
Hue: 10YR to 5YR
Value: 4 to 7 dry, 3 or 4 moist
Chroma: 2 or 3 dry, 2 to 4 moist
Texture: very gravelly loamy fine sand, very gravelly loamy sand, extremely cobbly sand or very cobbly sand; subhorizons of very gravelly sandy loam are in the lower part of some pedons.
Rock fragments: 35 to 65 percent
Reaction: neutral or slightly alkaline

COMPETING SERIES: These are the Beaverton (MT), Shirttail (SD) and Silvercity (MT) series.
Beaverton: have gravel and sand layers at a depth of 10 to 20 inches (25 to 51 cm) and have horizons of carbonate accumulation below the argillic horizon
Shirttail: 40 to 60 inches (102 to 152 cm) deep to a lithic contact.
Silvercity: have horizons of carbonate accumulation below the argillic horizon

GEOGRAPHIC SETTING:
Parent material: colluvium and slope alluvium derived from basic and intermediate igneous and sedimentary rocks
Landform: mountain slopes and benches
Slopes: 2 to 60 percent
Elevation: 7,200 to 9,100 feet (2,195 to 2,774 m)
Mean annual air temperature: 39 to 45 degrees F (3.5 to 7.2 degrees C)
Mean annual precipitation: 13 to 22 inches (330 to 559 mm)
Frost-free period: 70 to 100 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Dalcan, Hesperus, Quilt and Zillion soils. Dalcan soils are clayey-skeletal and are 20 to 40 inches (51 to 102 cm) deep over bedrock. Hesperus soils have a mollic epipedon more than 16 inches (40 cm) thick and are fine-loamy. Quilt soils are fine textured and have less than 35 percent rock fragments in the Bt horizon. Zillion soils have a mollic epipedon more than 16 inches (40 cm) thick and have a calcic horizon.

DRAINAGE AND PERMEABILITY: Well drained; medium to high runoff; slow and moderately slow permeability; moderately high saturated hydraulic conductivity.

USE AND VEGETATION: The soils are used for rangeland, woodland, and wildlife habitat. The native vegetation is big sagebrush, yellowbrush, blue grama, tall native bluegrass; some areas have pinyon pine and Utah juniper.

DISTRIBUTION AND EXTENT: South-central Utah. The soils are of small extent.

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

SERIES ESTABLISHED: Canyonlands Area, San Juan Co. Utah, 1980. The current type location is in the Panguitch Area, Utah.

REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 5 to 40 inches (13 to 102 cm). (Bt1, Bt2 Bt3, and 2C1 horizons)

Mollic epipedon: The zone from 0 to 16 inches (0 to 40 cm). (A1, Bt1, Bt2 horizons)

Argillic horizon: The zone from 5 to 25 inches (13 to 64 cm). (Bt horizons)

Lithologic discontinuity: At the upper boundary of the 2C1 horizon.

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, 2010.

National Cooperative Soil Survey
U.S.A.