LOCATION GOMINE UT NVEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Lithic Haploxerolls
TYPICAL PEDON: Gomine very cobbly loam, rangeland. (Colors are for dry soil unless otherwise noted.) The soil surface is covered with 20 percent cobbles and 20 percent gravel.
A--0 to 18 cm; grayish brown (10YR 5/2) very cobbly loam, dark brown (10YR 3/3) moist; weak fine granular structure; soft, friable, slightly sticky and slightly plastic; few medium, common fine and very fine roots; common fine and very fine pores; 15 percent cobbles and 15 percent gravel; neutral (pH 7.2); clear smooth boundary. (18 to 23 cm thick)
Bw--18 to 43 cm; brown (10YR 5/3) very cobbly loam, brown (10YR 4/3) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few medium and common very fine and fine roots; common fine and very fine pores; 35 percent cobbles and 15 percent gravel; neutral (pH 7.2); clear wavy boundary. (13 to 28 cm thick)
R--43 cm; hard igneous bedrock.
TYPE LOCATION: Iron County, Utah; about 1 mile northeast of Chokecherry Spring, about 800 feet south and 400 feet west of the northeast corner of section 26, T. 31 S., R. 20 W; USGS Rice Mountain 7.5 minute topographic quadrangle; Latitude 38 degrees 4 minutes 54.8 seconds N and longitude 114 degrees 2 minutes 35.9 seconds W; NAD83.
RANGE IN CHARACTERISTICS:
Soil moisture regime - Xeric bordering on aridic. The moisture control section is dry 60 to 90 consecutive days in the 4 months following the summer solstice. Mean annual soil temperature - 7.2 to 8.3 degrees C.
Mean summer soil temperature - 15 to 17 degrees C.
Other features - These soils are noncalcareous throughout.
Depth to the lithic contact - 25 to 50 cm.
Control section - Clay content: 18 to 27 percent.
Rock fragments: 35 to 50 percent and are dominantly gravel and cobble size.
A horizon - Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 2 or 3.
Texture: Very cobbly loam or very gravelly loam.
Bw horizon - Value: 5 or 6 dry, 3 or 4 moist.
Chroma: 2 or 3.
Texture: Very cobbly loam or very gravelly loam.
COMPETING SERIES: These are the Agassiz (UT), Alomax T(CA), Anatone (WA), Bluecanyon (T OR), Bocker (WA), Cedaran (NV), Dipcreek T(ID), Falula (UT), Foxol (UT), Gando (NV), Grink (NV), Hogsby (MT), Little Pole (UT), Nayrib (ID), Rexmont (UT), Swanner (ID) and Van Wagoner (UT) series. Agassiz, Foxol, and Little Pole soils are dry in the soil moisture control section for less than 60 consecutive days. Alomax, Bluecanyon, Dipcreek, Gando, Grink, Hogsby, and Van Wagoner soils have less than 18 percent clay in the particle size control section. Anatone soils are 7.5YR and redder. Bocker and Nayrib soils are less than 25 cm to bedrock. Cedaran soils have an aridic soil moisture regime. Falula, Rexmont and Swanner soils are calcareous.
GEOGRAPHIC SETTING: Gomine soils are on ridgetops and mountainsides. Slope ranges from 15 to 40 percent. The soil formed in residuum and colluvium from igneous rocks. The average annual precipitation is 304 to 406 mm. The mean annual air temperature ranges from 6.1 to 7.2 degrees C. Elevations range from 2,070 to 2,380 meters and the frost-free period is 70 to 90 days.
GEOGRAPHICALLY ASSOCIATED SOILS: This is the Itca soils. Itca soils are clayey-skeletal and have an argillic horizon.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; moderate permeability.
USE AND VEGETATION: These soils are used for rangeland. Important plants are pinyon, Utah juniper, black sagebrush, antelope bitterbrush, mountain big sagebrush, bluebunch wheatgrass and Indian ricegrass.
DISTRIBUTION AND EXTENT: Southwestern Utah. MLRA 28A. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Iron County, Utah, Iron-Washington Area Soil Survey Area, 1997.
REMARKS: Diagnostic horizons and features found in this pedon are:
Mollic epipedon - 0 to 18 cm (A horizon).
Lithic contact - 43 cm.
The cation exchange activity class is an estimate based on NASIS data.
Geographic coordinates converted from NAD27 to NAD83 using NADCON interactive conversion.