LOCATION QUILT UTEstablished Series
TAXONOMIC CLASS: Fine, smectitic, frigid Aridic Argiustolls
TYPICAL PEDON: Quilt very cobbly loam--rangeland. (Colors are for air-dry soil unless otherwise stated.)
A--0 to 4 inches, dark grayish brown (10YR 4/2) very cobbly loam, very dark brown (10YR 2/2) moist; weak fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; common fine, medium, and coarse roots; few medium, common very fine and fine tubular pores; 30 percent gravel, 20 percent cobbles and 5 percent stones; mildly alkaline (pH 7.8); clear smooth boundary. (4 to 6 inches thick).
Bt1--4 to 10 inches; brown (7.5YR 4/2) cobbly clay, dark brown (7.5YR 3/2) moist; moderate fine angular blocky structure; hard, firm, sticky and plastic; few fine, medium and coarse roots; common fine and few medium tubular pores; continuous moderately thick clay films; 10 percent gravel and 10 percent cobbles; mildly alkaline (pH 7.6); clear smooth boundary. (5 to 15 inches thick).
Bt2--10 to 19 inches; brown (7.5YR 5/4) cobbly clay, dark brown (7.5YR 4/2) moist; strong coarse angular blocky structure; very hard, very firm, sticky and plastic; few fine and medium roots; common fine and few medium tubular pores; continuous moderately thick clay films; 10 percent gravel and 10 percent cobbles; mildly alkaline (pH 7.6); clear smooth boundary. (8 to 22 inches thick).
Bt3--19 to 43 inches; brown (7.5YR 5/4) cobbly clay loam, dark grayish brown (10YR 4/2) moist; weak medium subangular blocky structure; very hard, firm, sticky and plastic; few fine roots; many fine tubular pores; few thin clay films; 15 percent gravel and 10 percent cobbles; mildly alkaline (pH 7.6); clear wavy boundary. (0 to 24 inches thick).
C1--43 to 48 inches; grayish brown (10YR 5/2) gravelly sandy clay loam, brown (10YR 4/3) moist; massive; hard, friable, sticky and plastic; few fine roots; common fine tubular pores; 20 percent gravel and 5 percent cobbles; slightly calcareous; moderately alkaline (pH 8.0); clear wavy boundary. (0 to 5 inches thick).
C2--48 to 60 inches; pinkish gray (7.5YR 5/2) gravelly coarse sandy loam, brown (7.5YR 4/2) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; interstitial pores; 20 percent gravel and 1 percent cobbles; slightly calcareous; moderately alkaline (pH 8.4).
TYPE LOCATION: Garfield County, Utah; 2,000 feet north and 2,400 feet west of the southeast corner of sec. 29, T. 35 S., R. 5 W., SLBM, 6 miles south of Panguitch.
RANGE IN CHARACTERISTICS: The mollic epipedon is 10 to 16 inches thick. The solum is 40 to 60 inches thick. The rock fragment content in the control section ranges from 20 to 35 percent. The mean annual soil temperature at 20 inches ranges from 42 to 47 degrees F. The soil moisture regime is ustic bordering on aridic. The mean summer temperature ranges from 59 to 63 degrees F. The soils are dry in parts of the moisture control section for 60 to 75 days during the winter months, but are moist for 50 to 55 percent of the time when the soil temperature at 20 inches depth, is more than 41 degrees F.
The A horizon has hue of 10YR or 7.5YR, value of 4 or 5 dry and 2 or 3 moist, and chroma of 2 to 4 dry and 2 or 3 moist. It is neutral to mildly alkaline.
The Bt horizon has hue of 7.5YR, value of 4 to 6 dry and 3 or 4 moist, and chroma of 2 to 4 dry and moist. The soils with value of 3 or less moist and 5 or less dry with chroma of 3 or less extent to depths of 10 to 16 inches. The Bt horizon is cobbly clay, cobbly clay loam, or gravelly clay loam with 35 to 45 percent clay and 20 to 35 percent rock fragments. It is neutral to mildly alkaline.
The Bk horizon when present has a hue of 2.5Y through 7.5YR, value 5 to 7, dry and 4 to 6 moist, chroma of 2 or 3.
COMPETING SERIES: These are Ethridge (MT), Holderness (CO), Morop (CO), Nilrap (WY), Nunnston (WY), Scobey (MT), Tanna (MT), and Ulric T(WY). Ethridge and Scobey soils have Bky horizons with accumulations of carbonates and gypsum. Holderness and Ulric soils are deep to bedrock. Morop, Nilrap, Nunnston and Scobey soils have less than 15 percent rock fragments in the particle size control section. Tanna soils are moderately deep to bedrock.
GEOGRAPHIC SETTING: The Quilt soils are at elevations of 6,800 to 8,500 feet. Slopes range from 4 to 60 percent. These soils are on mountainsides, benches, low hills and fan remnants. They formed in residuum, colluvium and alluvium from mixed igneous rocks, sandstone and shale. The climate is dry subhumid, the average annual precipitation is 12 to 16 inches in Utah and ranges up to 18 inches in Colorado. The mean annual temperature is 40 to 45 degrees F., and the freeze-free period is 70 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: This is the Waltershow soil. Waltershow soils are on similar landscapes and have more than 35 percent rock fragments in the argillic horizon.
DRAINAGE AND PERMEABILITY: Well drained; slow permeability; slow to rapid runoff.
USE AND VEGETATION: These soils are used for rangeland. The native vegetation is black sagebrush, mountain big sagebrush, blue grama, bitterbrush, pinyon pine and juniper.
DISTRIBUTION AND EXTENT: South central Utah, western Garfield County. The series is not extensive. MLRA 47.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Garfield County, Panguitch Soil Survey, Utah, 1984.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from the surface of the soil to 10 inches (A and Bt1 horizons)
Argillic horizon - the zone from 4 to 43 inches (Bt1, Bt2, and Bt3 horizons)
In October 1994 the classification was changed from a Typic Argiborolls to Aridic Argiborolls based on 12 to 16 inch precipitation and upland range sites.