LOCATION REEBOK UTEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic, shallow Petrocalcic Palexerolls
TYPICAL PEDON: Reebok cobbly loam--rangeland. (Colors are for air-dry soil unless otherwise noted.)
A1--0 to 5 cm; dark grayish brown (10YR 4/2) cobbly loam, very dark grayish brown (10YR 3/2) moist; weak thin platy structure parting to moderate fine granular; soft, friable, slightly sticky and slightly plastic; common very fine roots; common fine pores; 20 percent cobbles and pebbles; slightly alkaline (pH 7.6); abrupt smooth boundary. (3 to 8 cm thick)
A2--5 to 13 cm; dark grayish brown (10YR 4/2) cobbly loam; very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; soft, friable, slightly sticky and moderately plastic; few fine, medium and very fine roots; common fine pores; 20 percent gravel and cobbles; slightly alkaline (pH 7.6); clear smooth boundary. (5 to 8 cm thick)
Bt--13 to 28 cm; brown (10YR 5/3) very cobbly clay loam; very dark grayish brown (10YR 3/2) moist; strong medium subangular blocky structure; hard, firm, moderately sticky and moderately plastic; few fine, medium and very fine roots; common fine pores; common distinct clay films on faces of peds; 50 percent cobbles, 5 percent gravel; moderately alkaline (pH 7.9); clear smooth boundary. (10 to 15 cm thick)
Bk1--28 to 38 cm; grayish brown (10YR 5/2) very cobbly clay loam; dark grayish brown (10YR 4/2) moist; moderate medium subangular blocky structure; hard, firm, moderately sticky and moderately plastic; few fine and medium roots; common fine pores; 35 percent cobbles, 15 percent hardpan fragments; strongly effervescent, (14 percent calcium carbonate equivalent), carbonate coats on bottom of rock fragments; moderately alkaline (pH 8.0); abrupt smooth boundary. (8 to 10 cm thick)
Bk2--38 to 48 cm; pale brown (10YR 6/3) extremely gravelly loam, brown (10YR 5/3) moist; extremely hard, friable, slightly sticky and slightly plastic; discontinuous indurated pan; 60 to 70 percent hardpan fragments; violently effervescent, (53 percent calcium carbonate equivalent); moderately alkaline (pH 8.1); abrupt smooth boundary. (0 to 10 cm thick)
Bkkm--48 to 58 cm; indurated carbonate hardpan that has a laminar cap surface and very pale brown (10YR 7/3) laminae 2 to 4 mm thick. Subjacent layers are very pale brown (10YR 8/2) moist and are softer; violently effervescent, (92 percent calcium carbonate equivalent); moderately alkaline (pH 8.4).
TYPE LOCATION: Juab County, Utah; about 7.5 miles WSW of Mona; near the north end of Dog Valley; about 800 feet east and 2,000 feet north of the southwest corner of sec. 6, T 12S., R 1W.; Slate Jack Canyon USGS 7.5 minute quadrangle; latitude 39 degrees 47 minutes 42 seconds N and longitude 111 degrees 59 minutes 10 seconds W; NAD83.
RANGE IN CHARACTERISTICS:
Soil moisture: Moist in winter and spring and continuously dry in all parts for significant periods in summer and fall; xeric soil moisture regime bordering aridic.
Mean annual soil temperature: 8.0 to 13.0 degrees C.
Mean summer soil temperature: 20.0 to 21.5 degrees C.
Depth to petrocalcic horizon: 25 to 51 cm.
Thickness of mollic epipedon: 18 to 38 cm.
Particle-size control section - Clay content: 18 to 35 percent
Rock fragment content: 35 to 60 percent [r5]
A horizons
Value: 4 or 5 dry, 2 or 3 moist.
Chroma: 1 to 3 moist and dry.
Reaction: neutral to moderately alkaline.
Bt horizons
Value: 4 through 6 dry, 3 or 4 moist.
Chroma: 2 or 3 moist.
Texture: Loam or clay loam.
Modifiers: Very gravelly or very cobbly.
Reaction: Slightly alkaline to strongly alkaline.
Bk horizons
Value: 5 to 8 dry, 3 through 6 moist.
Chroma: 1 to 3 dry and moist.
Texture: clay loam or loam.
Modifiers: Very gravelly, very cobbly or extremely gravelly.
Clay content: 18 to 35 percent.
Rock fragment content: 35 to 75 percent.
Reaction: Slightly alkaline to strongly alkaline.
Effervescence: Slightly or strongly effervescent
Bkkm horizon(consists of one or more indurated layers):
Value: 6 or 7 dry and 4 through 6 moist.
COMPETING SERIES: There are no competing series in this family
GEOGRAPHIC SETTING: These soils occur on alluvial fans, fan remnants and hillsides at elevations of 1,524 to 2,320 meters. Slopes range from 2 to 60 percent. The soils formed in alluvium and colluvium from latite, welded breccia, andesite, rhyolite, quartzite, and limestone. Mean annual temperature ranges from 7.0 to 11.7 degrees C. The freeze-free period is 100 to 140 days. Average annual precipitation is 300 to 400 mm.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Borvant, Dagor, Donnardo, Mountainville, Renol and Sumine soils and the similar Pavant soils. Borvant soils have carbonatic mineralogy. Dagor, Donnardo, Mountainville and Sumine soils do not have petrocalcic horizons. Renol soils have a petrocalcic horizon at a depth of 50 to 100 cm and an aridic soil moisture regime.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability; moderately high hydraulic conductivity.
USE AND VEGETATION: Used mainly for livestock grazing and wildlife habitat. Potential vegetation is big sagebrush, bluebunch wheatgrass, peavine, and Indian ricegrass. These soils are correlated to upland ecological sites in Utah.
DISTRIBUTION AND EXTENT: Inextensive; located in central Utah.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Phoenix, Arizona
SERIES ESTABLISHED: Fairfield-Nephi Area, Utah, 1980.
REMARKS:Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon: - The zone from 0 to 28 cm (A1, A2 and Bt horizons).
Argillic horizon - The zone from 13 to 28 cm (Bt horizon).
Petrocalcic horizon: The zone from 48 to 58 cm (Bkkm horizon).
Particle-size control section - The zone from 13 to 28 cm (Bt horizon).
The assignment of the cation-exchange activity class is inferred from lab data from similar soils in the surrounding area.
Taxonomic Version: Classified according to Keys to Soil Taxonomy, Tenth Edition, 2006.