LOCATION POMADE UTTentative Series
TAXONOMIC CLASS: Loamy, mixed, superactive, frigid, shallow Petrocalcic Palexerolls
TYPICAL PEDON: Pomade gravelly loam, rangeland. (Colors are for air dry soil unless otherwise noted.)
A--0 to 7 inches; grayish brown (10YR 5/2) gravelly loam, very dark grayish brown (10YR 3/2) moist: weak fine subangular blocky structure that parts to weak fine granular; soft, friable, slightly sticky and slightly plastic; common fine and few medium and coarse roots; common very fine and few coarse pores; 15 percent gravel and 5 percent cobbles; moderately calcareous; moderately alkaline (pH 8.4); abrupt smooth boundary. (5 to 10 inches thick)
Bk--7 to 13 inches; light brownish gray (10YR 6/2) loam, dark grayish brown (10YR 4/2) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and few medium roots; common very fine and fine and few coarse pores; 5 percent pebbles; strongly calcareous; strongly alkaline (pH 8.6); clear wavy boundary. (4 to 13 inches thick)
Bk2--13 to 16 inches; light brownish gray (10YR 6/2) gravelly loam, brown (10YR 5/3) moist; moderate fine subangular blocky structure; hard, firm, slightly sticky and slightly plastic; few fine roots; few fine, medium and coarse pores; 15 percent pebbles and 10 percent cobbles; very strongly calcareous; strongly alkaline (pH 8.6); abrupt wavy boundary. (O to 3 inches thick)
Bkm--16 inches; indurated lime cemented hardpan.
Type Location: Sevier County, Utah; 7 miles north of Koosharem Reservoir, 1,000 feet east and 400 feet south of the northwest corner of section 24, T.24S., R.lW., SLBM.
RANGE IN CHARACTERISTICS: The mollic epipedon is 5 to 10 inches thick. When mixed the upper 7 inches meet the requirement for a mollic epipedon. Depth to the indurated petrocalcic horizon ranges from 10 to 20 inches. Rock fragments in the control section ranges from 5 to 35 percent. The mean annual soil temperature at depth of 20 inches is 42 to 44 degrees F. The mean summer temperature is 60 to 63 degrees F. These soils are usually moist, but are dry for 45 to 65 days during the summer solstice, and are moist in all parts for 60 to 75 consecutive days or more within the 3 month period following the winter solstice in more than 7 out of 10 years.
The A horizon has hue of 10YR or 7.5YR, value of 4 or 5 dry, 2 or 3 moist, and chroma of 2 or 3 dry or moist. It is gravelly loam or very stony loam. This horizon is typically moderately calcareous, but is noncalcareous in the top 2 or 3 inches of some pedons. It is mildly or moderately alkaline.
The Bk horizon has hue of 10YR or 7.5YR, value of 5 or 6 dry, 3 through 5 moist, and chroma of 2 or 3. It is loam, gravelly loam or cobbly loam and has 5 to 35 percent rock fragments. The Bk horizon is moderately through very strongly calcareous, but averages less than 40 percent calcium carbonate equivalent. It is moderately or strongly alkaline and is 8 to 13 inches thick.
COMPETING SERIES: This is the May Day(UT) series. May Day soils have an argillic horizon.
GEOGRAPHIC SETTING: The Pomade soils are at elevations of 6,800 to 7,400 feet. Slopes are 2 to 30 percent. These soils occur on ridges, mountain slopes, and alluvial fans and formed in alluvium and colluvium from basic and intermediate igneous rocks. The climate is dry subhumid, the average annual precipitation is 14 to 16 inches. The mean annual air temperature is 40 to 42 degrees F., and the frost free period is 80 to 90 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Acord soils and the competing May Day soils. Acord soils have an argillic horizon and are more than 60 inches deep.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderate permeability above the hardpan.
USE AND VEGETATION: These soils are used for range. The native vegetation is big sagebrush, Indian ricegrass, needleandthread, squirreltail and western wheatgrass.
DISTRIBUTION AND EXTENT: Central Utah, Sevier and Piute Counties. MLRA 47. The series is inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Sevier County (Sevier County Soil Survey), Utah, 1976.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from the surface of the soil to 7 inches (A horizon).
Calcic horizon - the zone of calcium carbonate accumulation from 7 to 16 inches (Bk1, Bk2 horizons).
Petrocalcic horizon - the zone of indurated calcium carbonate at 16 inches (Bkm horizon).
Particle-size control section - the zone from 10 to 16 inches.
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 Lakewood MLRA office, without review of the soil series property data. The remainder of this document has not been updated.