LOCATION SOLAK UT+NVEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, calcareous, frigid Lithic Xeric Torriorthents
TYPICAL PEDON: Solak gravelly loam - on west facing slightly convex slope of 15 percent in rangeland. (When described the soil was dry throughout. Colors are for dry soil unless otherwise noted.)
A1--0 to 5 inches; brown (7.5YR 5/3) gravelly loam, dark brown (7.5YR 3/3) moist; weak fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine, and few fine and medium roots; 25 percent pebbles; slightly calcareous, lime as flakes; mildly alkaline (pH 7.6); clear smooth boundary. (2 to 6 inches thick)
C1ca--5 to 9 inches; light brown (7.5YR 6/4) very gravelly loam, brown (7.5YR 5/4) moist; weak fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; few fine and medium roots; many very fine and fine pores; 50 percent pebbles and 5 percent cobbles; strongly calcareous, lime as flakes; moderately alkaline (pH 8.2); clear wavy boundary. (4 to 8 inches thick)
C2ca--9 to 15 inches; pink (7.5YR 7/4) extremely gravelly loam, light brown (7.5YR 6/4) moist; weak fine and medium subangular blocky structure; hard; friable, slightly sticky; few fine roots; common very fine pores; 60 percent pebbles and 5 percent cobbles; strongly calcareous, lime as flakes; strongly alkaline (pH 8.8); abrupt wavy boundary. (4 to 11 inches thick)
R--15 inches; conglomerate.
TYPE LOCATION: Rich County, Utah; about 1 mile east and 1/2 mile north of Laketown; 1,200 feet east and 300 feet south of the northwest corner of sec. 32, T. 13 N., R. 6 E.
RANGE IN CHARACTERISTICS: The A1 horizon ranges from 2 to 6 inches thick. Depth to bedrock is typically about 15 inches but ranges from 10 to 20 inches. The particle-size control section range from 12 to 20 inches. The particle-size control section ranges from 12 to 20 percent clay and from 35 to 80 percent rock fragments, commonly pebbles but ranging to cobbles. The mean annual soil temperature is 38 to 46 degrees F., and the mean summer soil temperature is 60 to 65 degrees F. The soil is usually dry in all parts 50 to 55 percent of the time that the soil temperature at a depth of 20 inches is warmer than 41 degrees F.
The A1 horizon has hue of 5YR, 7.5YR or 10YR value of 4 through 7 dry, 3 or 4 moist and chroma of 3 or 4 dry and 2 through 4 moist. It is commonly gravelly loam and less commonly very cobbly loam. This horizon is neutral to moderately alkaline and noncalcareous to strongly calcareous.
The C horizon has hue of 5YR, 7.5YR or 10YR, value of 4 through 8 dry, 3 through 7 moist and chroma of 2 through 6 dry, 3 through 8 moist. It commonly is very gravelly loam or extremely gravelly loam and less commonly extremely cobbly sandy loam or extremely cobbly loam. This horizon is mildly alkaline to strongly alkaline and slightly calcareous to strongly calcareous.
COMPETING SERIES: These are the Highams, Promo and Emigration series in other families. Highams soils average more than 40 percent carbonates throughout the control section. Emigration soils average more than 27 percent clay in the particle-size control section and have a xeric moisture regime. Promo soils have a mean annual soil temperature warmer than 47 degrees F.
GEOGRAPHIC SETTING: Solak soils are on a foothill slopes, mountain slopes, and ridges that have a convex or concave-convex surface. The slope gradient is 10 to 60 percent. The soils formed in residuum and colluvium weathered commonly from conglomerate composed of sandstone, quartzite, and limestone, and less commonly from interbedded sandstone and limestone. Elevations range from 6,000 to 7,750 feet. The mean annual temperature is 36 to 44 degrees F., and the average annual precipitation is about 9 to 14 inches. Freeze-free season is 50 to 85 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Duckree, Dagan, Falula, Jebo, Kearl, Lundy, Ranruff, Woodpass and Vanni soils. Duckree and Woodpass soils are very deep and have a cambic horizon. Ranruff soils have less than 35 percent rock fragments in the particle-size control section. Dagan, Falula, Jebo, Kearl, and Vanni soils have a cambic horizon. Falula and Lundy soils have a horizon of carbonate accumulation.
DRAINAGE AND PERMEABILITY: Somewhat excessively drained; rapid runoff; moderate permeability.
USE AND VEGETATION: The soil is used for rangeland. Native vegetation is bluebunch wheatgrass, big sagebrush, black sagebrush, Sandberg bluegrass, and Utah juniper.
DISTRIBUTION AND EXTENT: Solak soils occur in northeastern Utah. They are of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Rich County, Utah, 1980.
OSED scanned by SSQA. Last revised by state 4/80.
REMARKS:
The superactive cation exchange activity class was added in 03/2003 to the taxonomic classification by the National Soil Survey Center on request of the Reno MLRA office, without review of the soil series property data. The remainder of this document has not been updated.