LOCATION GREENHALGH UTEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, calcareous, frigid Ustic Torrifluvents
TYPICAL PEDON: Greenhalgh silt loam, on a 3 percent single west facing slope--rangeland. When described the soil was dry throughout. (Colors are for dry soils unless otherwise stated.)
A--0 to 2 inches; brown (10YR 5/3) silt loam, dark brown (10YR 4/3) moist; moderate, medium platy structure; slightly hard, friable, slightly sticky and slightly plastic; few fine and medium roots; many fine tubular pores; moderately calcareous; moderately alkaline (pH 8.4); abrupt smooth boundary. (2 to 8 inches thick)
C--2 to 60 inches; brown (10YR 5/3) silt loam, dark grayish brown (10YR 4/2) moist; massive; slightly hard, friable, slightly sticky and slightly plastic; few fine roots; few fine tubular pores; thin lenses of fine sandy loam; moderately calcareous; moderately alkaline (pH 8.0).
TYPE LOCATION: Garfield County, Utah about 3/4 mile north and 1 1/2 miles east of Bear Valley Junction; 500 feet north and 1,200 feet west of the southeast corner of sec. 35, T. 32 S., R. 5 W.
RANGE IN CHARACTERISTICS: Clay in the particle-size control section averages 18 to 27 percent. The mean annual soil temperature is 42 to 47 degrees F., and the mean summer temperature is 60 to 63 degrees F. The soils are dry in parts of the moisture control section for 75 to 90 days during the winter months, and dry in all parts of the moisture control section 40 to 50 percent of the time when the soil temperature at a 20 inch depth is more than 41 degrees F.
The A horizon has hue of 10YR. Value of 5 or 6 dry and 4 moist, and chroma of 2 or 3. It is moderately alkaline or strongly alkaline.
The C horizon has hue of 10YR, value of 5 to 7 dry and 4 or 5 moist, and chroma of 2 or 3. It is mostly silt loam and loam, but some pedons include sandy loam below depth of 40 inches. The calcium carbonate equivalent is mainly 3 to 15 percent but ranges to 25 percent in some pedons.
COMPETING SERIES: Presently no other soils are classified in the same family. Closely similiar soils include the Codley, Havre and the Naplene series. Codley soils have carbonatic mineralogy. Havre soils are fine-loamy. Naplene soils are in the mesic temperature regime.
GEOGRAPHIC SETTING: Greenhalgh soils are on low lying alluvial fans and valley floors. Slopes range from 1 to 5 percent. Elevation ranges from 6,400 to 7,600 feet. The soils formed in alluvium from mixed sedimentary and igneous rocks. The mean annual temperature is 40 to 45 degrees F., and the average annual precipitation is 9 to 12 inches. The freeze-free period is 70 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: The competing Codley, Alldown, and Notter soils. Notter soils are on higher parts of the alluvial fans, have argillic horizons and are fine-loamy. Alldown soils are on similar landscapes and are in the fine-loamy family.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is slow. Permeability is moderate.
USE AND VEGETATION: The Greenhalgh soils are used mainly for rangeland and wildlife habitat with some areas used for irrigated cropland. Native vegetation is dominantly big sagebrush, blue grama, winterfat, fourwing saltbush and fringe sagebrush.
DISTRIBUTION AND EXTENT: Greenhalgh soils are of small extent. They are mapped near Panguitch and John's Valley areas of Garfield County.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Panguitch Soil Survey Area, Garfield County, Utah 1984.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface of the soil to 2 inches (A horizon)
Fluvent feature - an irregular decrease in organic matter.
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.