LOCATION BARKELEW COEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Aridic Calciustepts
TYPICAL PEDON: Barkelew very cobbly clay loam - rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 2 inches; dark grayish brown (10YR 4/2) very cobbly clay loam, very dark grayish brown (10YR 3/2) moist; moderate fine granular structure; slightly hard, very friable, sticky and plastic; 15 percent pebbles, 20 percent cobbles, 10 percent stones; slightly effervescent; mildly alkaline (pH 7.4); clear smooth boundary. (2 to 4 inches thick)
Bw--2 to 10 inches; dark yellowish brown (10YR 4/4) cobbly clay loam, dark brown (10YR 4/3) moist; moderate medium subangular blocky structure; slightly hard, very friable, sticky and plastic; 15 percent pebbles, 10 percent cobbles; slightly effervescent; mildly alkaline (pH 7.6); clear smooth boundary. (5 to 12 inches thick)
Bk1--10 to 22 inches; white (10YR 8/1) extremely stony clay loam, pale brown (10YR 6/3) moist; massive; hard, friable, sticky and slightly plastic; 20 percent pebbles, 25 percent cobbles, 20 percent stones; lime disseminated; 19 percent calcium carbonate equivalent; violently effervescent; moderately alkaline (pH 8.2). (10 to 20 inches thick)
Bk2--22 to 60 inches; white (10YR 8/1) extremely stony loam, pale brown (10YR 6/3) moist; massive; hard, friable, sticky and slightly plastic; 20 percent pebbles, 25 percent cobbles, and 20 percent stones; lime disseminated; 23 percent calcium carbonate equivalent; violently effervescent; moderately alkaline (pH 8.2).
TYPE LOCATION: San Miguel County, Colorado; 2,000 feet south and 2,l0 feet west of the northeast corner, Sec. 12, T. 43 N., R. 15 W.
RANGE IN CHARACTERISTICS: Mean annual soil temperature ranges from 44 to 47 degrees F, and mean summer soil temperature ranges from 59 to 66 degrees F. Barkelew soils have 27 to 35 percent clay in the particle-size control section. Calcium carbonate equivalent ranges from 15 to 40 percent. Depth to the calcic horizon ranges from 10 to 20 inches.
The A horizon has hue of 2.5Y through 7.5YR, value of 4 or 5, and 3 to 5 moist, with chroma of 2 or 3. Reaction is mildly alkaline or moderately alkaline.
The Bw horizon has hue of 2.5Y through 7.5YR, value of 4 to 6, and 3 to 5 moist, with chroma of 3 or 4. Reaction is mildly alkaline or moderately alkaline. Textures are very cobbly or cobbly clay loam or loam.
The Bk horizon has hue of 2.5Y through 7.5YR, value of 6 to 8, 4 to 7 moist, and chroma of 1 to 4. Reaction is moderately alkaline or strongly alkaline. Textures are extremely stony loam or clay loam, very cobbly clay loam, sandy clay loam or loam.
COMPETING SERIES: These are the Bronell (CO), Brownsto (WY), Browtine (WY), Bruja (WY), and Bruman (UT) series. Brownsto soils have 15 to 27 percent clay in the particle-size control section. Bruman soils have 10 percent or less clay in the Bk horizon. Bronell soils lack a cambic horizon. Browtine and Bruja soils have 8 to 17 percent clay in the particle-size control section. In addition, Bruja has bedrock at 20 to 40 inches.
GEOGRAPHIC SETTING: Barkelew soils are on mesa and mountain hillslopes. Slopes are 5 to 65 percent. The soil formed in colluvium and glacial drift derived from mixed sources. Elevation ranges from 7,000 to 8,200 feet. The mean annual precipitation ranges from 13 to 16 inches. Mean annual temperature ranges from 42 to 45 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Callan, Emmons, Lillylands, Mitch, Nunemaker, and Sagedale series. Callan soils have a mollic epipedon and an argillic horizon. Lillylands and Mitch soils have thick mollic epipedons. Nunemaker and Sagedale soils lack skeletal particle-size control sections. Emmons soils lack skeletal particle-size control sections and have a mollic epipedon.
DRAINAGE AND PERMEABILITY: Well drained; very rapid runoff; moderate or moderately slow permeability.
USE AND VEGETATION: These soils are used for livestock grazing and wildlife habitat. Principal native vegetation is pinon pine, Utah juniper, Rocky Mountain juniper, Gambel oak, serviceberry, 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: San Miguel County (San Miguel Area), Colorado, 1987.
REMARKS: Diagnostic features are a calcic horizon from 10 to 60 inches or more. Last updated by the state 12/90.