LOCATION BODACIOUS UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Lithic Haploxerolls
TYPICAL PEDON: Bodacious cobbly loam on a 40 percent south-facing slope--rangeland. (Colors are for air-dry soil unless otherwise stated.)The soil surface is covered with 30 percent cobbles and 10 percent gravel.
A1--0 to 2 inches; brown (10YR 5/3) cobbly loam, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; soft, friable, slightly sticky and slightly plastic; few medium, common fine and few very fine roots; common medium and fine, many very fine interstitial pores; 25 percent cobbles; neutral (pH 7.2); and clear wavy boundary. (2 to 4 inches thick)
A2--2 to 7 inches; brown (10YR 5/3) very cobbly loam, dark brown (10YR 3/3) moist; weak fine subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common medium, fine and very fine roots; few medium, many fine and very fine interstitial pores; 35 percent cobbles and 15 percent gravel; neutral (pH 7.2); clear wavy boundary. (4 to 6 inches thick)
Bw--7 to 19 inches; light yellowish brown (10YR 6/4) very cobbly loam, dark yellowish brown (10YR 4/4) moist; moderate fine subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; common fine and very fine roots; few medium, many fine and very fine tubular and interstitial pores; 40 percent cobbles and 15 percent gravel; slightly alkaline (pH 7.4); abrupt wavy boundary. (6 to 13 inches thick)
R--19 inches; hard, igneous bedrock.
TYPE LOCATION: Iron County, Utah; about 1 mile northeast of Rice Mountain in Hamlin Valley; 575 feet south and 500 feet west of the southwest corner, sec. 7, T. 32 S., R. 20 W.
RANGE IN CHARACTERISTICS:
Soil moisture: These soils are dry for over 60 consecutive days in the four months following the summer solstice. Xeric bordering on aridic soil moisture regime.
Mean annual soil temperature at a depth of 20 inches or at bedrock: 47 to 50 degrees F.
Mean summer soil temperature: 63 to 67 degrees F.
Mollic epipedon thickness: 7 to 10 inches thick.
Bedrock depth: 12 to 20 inches.
Particle-size control section:
Clay content: Averages 18 to 35 percent.
Rock fragments: 35 to 60 percent, mainly cobbles or gravel.
A horizon:
Rock fragments: 15 to 45 percent.
Reaction: Neutral or slightly alkaline.
Bw horizon:
Hue: 10YR or 7.5YR
Value: 4 to 6 dry, 3 or 4 moist.
Chroma: 3 or 4, dry or moist.
Texture: Loam, subhorizons of clay loam are in some pedons.
Clay content: 18 to 26 percent.
Rock fragments: 35 to 60 percent, mainly gravel or cobbles.
Reaction: Neutral or slightly alkaline
COMPETING SERIES: These are the Aldax (NV), Bakeoven (OR), Bodell (OR), Couleedam (WA), Hendap (NV), Johntom (WA), Lickskillet (OR), Limekiln (WA), Plaskett (CA), Rockly (OR) and Venator (OR) series. Aldax, Plaskett and Johntom soils have less than 18 percent clay in the particle-size control section. Bodell soils have a mean annual soil temperature from 50 to 55 degrees F. Hendap soils have 6 to 12 percent clay in the particle-size control section. Lickskillet soils are dry more than 50 percent of the time. Limekiln soils have a calcic horizon. Rockly and Bakeoven soils are 4 to 12 inches to bedrock. Venator soils have reactions that range to slightly acid and rock fragments that are primarily shale channers.
GEOGRAPHIC SETTING: Bodacious soils are on foothills and mountain slopes at elevations of 5,600 to 7,400 feet. Bodacious soils commonly occur on both south and west aspects. Slopes range from 15 to 60 percent. These soils formed in residuum and colluvium derived dominantly from mixed igneous and metamorphic rocks. The average annual precipitation is 12 to 16 inches and the mean annual temperature is 45 to 48 degrees F. The freeze-free period is 90 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Itca, Nevu and Pioche soils. All of these soils have argillic horizons. Itca and Pioche soils are shallow to bedrock and have greater than 35 percent clay. Itca soils usually occur at higher elevations on north and east aspects. Pioche soils occur on convex slopes on foothills. Nevu soils have an indurated silica and carbonate layer between 20 and 40 inches. These soils occur on fan terraces at lower elevations.
DRAINAGE AND PERMEABILITY: Well drained; medium to high runoff; moderate permeability.
USE AND VEGETATION: Used for rangeland and wildlife habitat. The native vegetation is singleleaf pinyon, Utah juniper, mountain big sagebrush and Indian ricegrass with some black sagebrush, antelope bitterbrush, curlleaf mountainmahogany and snowberry.
DISTRIBUTION AND EXTENT: Southwestern Utah. MLRA 28A. These soils are of moderate extent.
MLRA OFFICE RESPONSIBLE: Reno, Nevada
SERIES ESTABLISHED: Iron County (Iron-Washington Area), Utah, 1997. The series name is coined.
REMARKS: The diagnostic features recognized in this pedon are:
Mollic epipedon: The zone from the surface to about 7 inches. (A1, A2 horizons)
Cambic horizon: The subsoil horizon from 7 to 19 inches that has been altered by weathering without illuvial accumulation. (Bw horizon)
Lithic feature: Bedrock contact is at a depth of 19 inches.
The cation exchange activity class is an estimate based on NASIS data.