LOCATION WEBER CO+SDEstablished Series
TAXONOMIC CLASS: Fine-silty over sandy or sandy-skeletal, mixed, superactive, mesic Aridic Argiustolls
TYPICAL PEDON: Weber loam - grassland. (Colors are for dry soil unless otherwise noted. )
A1--0 to 4 inches; brown (7.5YR 5/2) loam, dark brown (7.5YR 3/2) moist; moderate fine granular structure; soft, very friable, slightly sticky, slightly plastic; noncalcareous; neutral (pH 7.2); clear smooth boundary. (3 to 8 inches thick)
B1--4 to 8 inches; reddish brown (5YR 5/3) heavy loam, dark reddish brown (5YR 3/3) moist; weak coarse subangular blocky structure that parts to coarse granules; slightly hard, very friable, slightly sticky, slightly plastic; peds are hard; few thin glossy patches on some faces of peds; noncalcareous; neutral (pH 7.2); clear smooth boundary. (0 to 6 inches thick)
B21t--8 to 22 inches; reddish brown (5YR 5/4) light clay loam, reddish brown (5YR 4/4) moist; moderate medium prismatic structure that parts to strong fine and very fine angular and subangular blocks; slightly hard, very friable, slightly sticky, slightly plastic; peds are very hard; continuous wax-like coatings on faces of peds and wax-like coatings and fillings on the inside of root channels; wax-like rims around the entrance to some soil pores; noncalcareous; mildly alkaline (pH 7.4); clear smooth boundary.
(6 to 23 inches thick)
B22t--22 to 28 inches; reddish brown (5YR 5/4) light clay loam, reddish brown (5YR 4/4) moist; moderate medium prismatic structure that parts to moderate medium and fine angular and subangular blocks; slightly hard, friable, slightly sticky, slightly plastic; peds are very hard; thin nearly continuous wax-like coatings on faces of peds and wax-like coatings and fillings on the inside of root channels; calcareous; moderately alkaline (pH 8. 2); clear smooth boundary. (0 to 10 inches thick)
Bca--28 to 32 inches; light reddish brown (5YR 6/4) light clay loam, reddish brown (5YR 5/4) moist; weak medium subangular blocky structure; hard, friable, slightly sticky, slightly plastic c; peds are very hard; few thin glossy patches on some faces of peds; visible secondary calcium carbonate, as concretions and in thin seams and streaks; calcareous; moderately alkaline (pH 8. 2); clear smooth boundary.
IIC--32 to 60 inches; calcareous gravelly and cobbly sand.
TYPE LOCATION: Montezuma County, Colorado; approximately 1/4 mile east of the SW corner of Sec. 36, T. 36 N., R. 14 W.
RANGE IN CHARACTERISTICS: Depth to uniformly calcareous material normally ranges from 8 to 35 inches and is not shallower than the upper 3 inches of the B2t horizon. Depth to the sandy-skeletal IIC horizon ranges from 20 to nearly 40 inches. Depth to the base of the argillic horizon ranges from 17 to nearly 40 inches. Depth to continuous subhorizons of visible secondary calcium carbonate and/or sulfate ranges from 12 to 50 inches. The control section of some pedons contains few faint mottles, not due to segregation of lime, and has a chroma of more than 2 in both matrix and mottling. Rock fragments range from 0 to 10 percent by volume in most subhorizons of the solum and range dominantly in size from 1/2 to 10 inches. A majority of subhorizons in the solum and any C horizon above the contrasting substratum have hue of 5YR or redder.
The A horizon has hue of 10YR through 5YR, value of 4 or 5 dry, 2 or 3 moist, and chroma from 1 through 3. It is neutral or mildly alkaline (1:5 dilution unbuffered organic dye).
The B2t horizon has hue of 7.5YR through 10R, value of 5 through 7 dry, 3 through 6 moist, and chroma of 1 through 6. It is typically loam, clay loam or silty clay loam, but clay ranges from 18 to 35 percent, silt 5 to 65 percent, and sand 10 to 70 percent. This horizon is neutral to moderately alkaline (1:5 dilution unbuffered organic dye). Calcium carbonate of the fine earth in the lower part of the solum or any C horizon above the contrasting substratum ranges from 3 to 14 percent.
COMPETING SERIES: These are the Atencio and Vale series. Atencio soils have more than 15 percent fine or coarser sand in the solum. Vale soils lack a sand and gravel substratum above a depth of 40 inches.
GEOGRAPHIC SETTING: The Webber soils are on gently to moderately sloping terraces and upland benches. Slopes typically range from about 0 to 10 percent or more. The soil formed in moderately thin calcareous reddish brown eolian materials overlying beds of sandy and gravelly alluvium or outwash. At the type location, the mean annual precipitation is about 15 inches with nearly equal precipitation in all months. Mean annual temperature is 45 degrees F., mean summer temperature is 63 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Falfa and Granath soils. Falfa soils have very thick polygenetic solums and lack a coarse textured substratum. Granath soils have mean annual soil temperature colder than 47 degrees F. and lack a coarse textured substratum.
DRAINAGE AND PERMEABILITY: Well drained; slow or medium runoff; moderate to rapid permeability.
USE AND VEGETATION: They are used as grazing land or as irrigated or dry cropland. Native vegetation is sage, cactus, western wheatgrass, juniper, and Indian ricegrass.
DISTRIBUTION AND EXTENT: Southwestern Colorado. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Western Colorado Reconnaissance Survey, 1939.
REMARKS: OSED scanned by NSSQA and cleaned up by Colorado. Last revised by state 10/72.