LOCATION REVOR UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic, shallow Haploxerollic Durixerolls
TYPICAL PEDON: Revor gravelly loam, rangeland. (Colors are for dry soil unless otherwise noted.)
The soil surface is covered with 60 percent gravel.
A1--0 to 2 inches; grayish brown (10YR 5/2) gravelly loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; soft, very friable, slightly sticky and slightly plastic; common fine and very fine roots; common medium, many fine and very fine pores; 10 percent gravel; slightly effervescent, carbonates are disseminated; mildly alkaline (pH 7.6); clear smooth boundary. (2 to 5 inches thick)
A2--2 to 7 inches; brown (10YR 5/3) gravelly loam, dark brown (10YR 3/3) moist; weak medium subangular blocky structure parting to weak fine subangular blocky; soft, very friable, slightly sticky and slightly plastic; common medium, many fine and very fine roots; common medium, many fine and very fine pores; 25 percent gravel; slightly effervescent, carbonates are disseminated; mildly alkaline (pH 7.6); abrupt smooth boundary. (2 to 5 inches thick)
Bkq--7 to 13 inches; pale brown (10YR 6/3) very gravelly loam, dark brown (10YR 4/3) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common medium, many fine and very fine roots; common medium, many fine and very fine pores; 45 percent gravel and duripan fragments; strongly effervescent, carbonates are disseminated; mildly alkaline (pH 7.8); abrupt wavy boundary. (6 to 10 inches thick)
Bkqm--13 to 27 inches; very pale brown (10YR 7/3) duripan, yellowish brown (10YR 5/4) moist; continuously capped by very thin silica laminae; extremely hard, extremely firm, slightly sticky and slightly plastic; common fine and few very fine roots matted on silica laminar cap; strongly effervescent, carbonates are disseminated; very strongly cemented by silica and carbonates; moderately alkaline (pH 8.2); clear smooth boundary. (9 to 14 inches thick)
2Bkq--27 to 60 inches; very pale brown (10YR 7/3) very gravelly sandy loam, yellowish brown (10YR 5/4) moist; very hard, very firm, nonsticky and nonplastic; 55 percent gravel; strongly effervescent, carbonates occur in soft masses and are disseminated; strongly cemented by silica and carbonates; moderately alkaline (pH 8.4).
TYPE LOCATION: Iron County, Utah, about 4.7 miles southeast of the Arrowhead Mine, adjacent to Jackson Wash, about 1,200 feet south and 1,125 feet west of the northeast corner of sec. 9, T. 31 S., R.17 W; Steamboat Mountain Quadrangle; lat. 38 degrees 7 minutes 26 seconds N. and long. 113 degrees 45 minutes 3 seconds W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 52 degrees F., and the mean summer temperature is 69 to 72 degrees F. These soils have a soil moisture regime that is xeric bordering on aridic.
Depth to the duripan is 10 to 20 inches. The mollic epipedon is 7 to 10 inches thick. The particle size control section contains 35 to 60 percent gravel sized rock fragments and averages 18 to 27 percent clay.
The A horizon has a hue of 10YR, value of 4 or 5 dry, 3 moist, and chroma of 2 or 3. Texture is gravelly loam, very gravelly loam or extremely gravelly loam. Rock fragment content is 10 to 65 percent gravel and 0 to 5 percent cobbles. Reaction is slightly to moderately alkaline.
The Bkq horizon has a hue of 7.5YR or 10YR, value is 6 or 7 dry and 4 to 6 moist, and chroma is 2 to 4. Texture is very gravelly loam. Reaction is moderately or strongly alkaline. Rock fragment content is 35 to 60 percent.
The 2Bkq horizon has a hue of 10YR, value is 6 or 7 dry and 5 or 6 moist, and chroma is 3 or 4. Texture is very gravelly sandy loam. Reaction is moderately or strongly alkaline. Rock fragment content is 35 to 60 percent.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Revor soils are on fan remnants at elevations of 6,100 to 6,700 feet. Slope are 2 to 8 percent. The soils formed in alluvium dominantly from igneous rocks. The mean annual precipitation is 12 to 14 inches. The mean air annual temperature is 45 to 50 degrees F., and the mean summer temperature is 67 to 70 degrees F. The freeze free period is 90 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Deerlodge and Pioche soils. Deerlodge soils are moderately deep to duripan and the Pioche soils are clayey-skeletal and shallow to bedrock.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderately permeability in the solum and very slow in the duripan.
USE AND VEGETATION: Used for grazing and wildlife habitat. Important plants are Utah juniper and pinyon pine, with an understory of bluebunch wheatgrass, Indian ricegrass, black sagebrush, Wyoming big sagebrush and antelope bitterbrush.
DISTRIBUTION AND EXTENT: Southwest Utah; Iron County. MLRA 28A. These soils are of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Iron County (Iron-Washington Soil Survey Area), Utah, 1997.
REMARKS: Diagnostic horizons and features found in this pedon are:
Mollic epipedon - the zone from the surface of the soil to 7 inches. (A1 and A2 horizons)
Duripan - the dominantly silica indurated layer at 13 inches. (Bkqm horizon)
Classification is based on the "Keys to Soil Taxonomy, Eighth Edition, 1998".