LOCATION YOVIMPA COEstablished Series
TAXONOMIC CLASS: Clayey, mixed, superactive, shallow Ustic Argicryolls
TYPICAL PEDON: Yovimpa light clay loam - rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 2 inches; grayish brown (10YR 5/2) light clay loam, very dark grayish brown (10YR 3/2) moist; weak fine granular structure; slightly hard, friable, sticky and plastic; moderately alkaline (pH 8.2); clear smooth boundary. (1 to 4 inches thick)
BA--2 to 7 inches; grayish brown (10YR 5/2) heavy clay loam, very dark grayish brown (10YR 3/2) moist; weak medium subangular blocky structure; hard, friable, sticky and plastic; thin patchy clay films on faces of peds; moderately alkaline (pH 8.2); clear wavy boundary. (3 to 8 inches thick)
Bt--7 to 18 inches; light yellowish brown (10YR 6/4) clay, dark brown (10YR 3/4) moist; moderately medium subangular blocky structure; very hard, firm, very sticky and very plastic; thin patchy clay films on faces of peds; moderately alkaline (pH 8.2); gradual wavy boundary. (6 to 12 inches thick)
Cr--18 inches; calcareous clay shale.
TYPE LOCATION: Summit County, Colorado; about 17 miles south of Kremmling and 1,100 feet east and 700 feet north of the southwest corner of Sec. 27, T. 3 S., R. 78 W.
RANGE IN CHARACTERISTICS: Depth to bedrock and thickness of solum ranges from 10 to 20 inches. Volume of coarse fragments range from 0 to 35 percent in the particle-size control section and are dominantly 1/2 to 1-1/2 inches in diameter. Mean annual soil temperature ranges from 38 to 40 degrees F. Mean summer soil temperatures range from 54 to 58 degrees F., at the paralithic contact. The soil is typically noncalcareous to the bedrock but the lower part of the Bt may be calcareous. Soil reaction ranges from neutral to moderately alkaline.
The A horizon has hue of 10YR or 7.5YR, value of 4 or 5 dry, 2 or 3 moist and chroma of 2 through 4.
The Bt horizon has hue of 2.5Y through 7.5YR, value of 5 through 7, 3 through 5 moist, with chroma of 3 through 6. Textures are clay loam or clay with 35 to 45 percent clay.
The C horizon, if present over bedrock, has hue of 2.5Y or 10YR, value of 4 through 7, 4 or 5 moist with chroma of 1 through 4.
COMPETING SERIES: These are currently no other competing series in this family.
GEOGRAPHIC SETTING: The Yovimpa soils are on mountainsides and ridges. Slopes range from 5 to 45 percent. The soil formed in material weathered from shale and slate bedrock. Mean annual precipitation ranges from 13 to 16 inches. Mean annual temperature ranges from 36 to 38 degrees F. Mean summer temperature ranges from 52 to 56 degrees F. Elevation is 7,500 to 9,000 feet with a frost-free season ranging from 30 to 75 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bucklon and Cimarron soils. Bucklon soils have less than 35 percent clay in their particle-size control sections and lack argillic layers. Cimarron soils lack bedrock above depths of 40 inches.
DRAINAGE AND PERMEABILITY: Moderately well drained; rapid runoff; slow permeability.
USE AND VEGETATION: These soils are used for rangeland and for wildlife habitat and recreation. Native vegetation consists of wheatgrasses, Indian ricegrass, squirreltail, winterfat, and big sagebrush.
DISTRIBUTION AND EXTENT: Yovimpa soils are moderately extensive in the north central mountains of Colorado.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Kane County (Paunsaugunt Area), Utah, 1969.
REMARKS: This revision documents a change in type location and series responsibility from Utah to Colorado. This soil was correlated in the publication of the soil survey of Summit County Area, Colorado. Last updated by the state 7/84.