LOCATION HYATTVILLE WYEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Ustic Haplocryalfs
TYPICAL PEDON: Hyattville stony loam-forested. (Colors are for dry soil unless otherwise stated.)
Oi--0 to 2 inches; forest duff.
E--2 to 9 inches; pinkish gray (7.5YR 6/2) stony loam, brown (7.5YR 4/2) moist; weak medium prismatic structure that parts to weak medium granular; soft, very friable; many very fine, fine, medium, and coarse roots; 5 percent channers, 6 percent flagstones, 5 percent stones; class I stoniness on the surface; slightly acid (pH 6.4); clear smooth boundary. (5 to 10 inches thick)
BE--9 to 14 inches; mixed pinkish gray (7.5YR 6/2) and brown (7.5YR 5/3) very channery clay loam, brown (7.5YR 4/2) moist; weak medium prismatic structure that parts to moderate fine and medium angular blocky; slightly hard, very friable, moderately sticky and slightly plastic; many very fine, fine, medium, and coarse roots; 30 percent channers; slightly acid (pH 6.4); clear wavy boundary. (4 to 8 inches thick)
Bt--14 to 22 inches; brown (7.5YR 5/4) very channery clay loam, brown (7.5YR 4/4) moist; moderate medium prismatic structure that parts to strong fine and medium angular blocky; hard, friable, moderately sticky and moderately plastic; many fine, medium, and coarse roots; continuous prominent clay films on faces of peds; 40 percent channers; neutral (pH 6.8); clear wavy boundary. (4 to 12 inches thick)
Btk--22 to 31 inches; light brown (7.5YR 6/4) very channery clay loam, brown (7.5YR 5/4) moist; weak medium prismatic structure that parts to moderate medium angular blocky; hard, friable, moderately sticky and moderately plastic; common fine, medium and coarse roots; continuous faint clay films on faces of peds; 40 percent channers, 15 percent flagstones; strongly effervescent, lime as few small soft masses; slightly alkaline (pH 7.8); gradual wavy boundary. (3 to 10 inches thick)
Bk--31 to 38 inches; pale brown (10YR 6/3) very channery clay loam, brown (10YR 5/3) moist; massive; hard, friable, moderately sticky and moderately plastic; few fine and medium roots; violently effervescent, lime as common fine soft masses; 40 percent channers, 10 percent flagstones; moderately alkaline (pH 8.0); gradual wavy boundary. (4 to 8 inches thick)
R--38 inches; fractured hard limestone that contains no large cracks or voids and does not permit entry of roots.
TYPE LOCATION: Washakie County, Wyoming; 1,000 feet south and 1,450 feet east of the NW corner of sec. 2, T. 47 N., R. 86 W.
RANGE IN CHARACTERISTICS: Depth to bedrock is 20 to 40 inches. Depth to uniformly calcareous material is 15 to 30 inches. Depth to the base of the B2t horizon is 15 to 30 inches. The E horizon is 5 to 10 inches thick. The mean annual soil temperature is 30 to 42 degrees F. Rock fragments less than 3 inches in diameter range from 5 to 45 percent. Rock fragments more than 3 inches in diameter range from 10 to 50 percent.
The E horizon has hue of 10YR or 7.5YR, value of 5 or 6 dry, 4 or 5 moist, and chroma of 1 or 2. It is slightly acid or neutral.
The Bt horizon has hue of 7.5YR or 5YR, value of 5 or 6 dry, 4 or 5 moist, and chroma of 3 through 6. Matrix texture is loam or clay loam with 18 to 35 percent clay and is modified by rock fragments. This horizon is neutral or slightly alkaline.
The Bk horizon has hue of 10YR or 7.5YR, value of 5 through 7 dry, 4 through 6 moist, and chroma of 2 through 6. Calcium carbonate equivalent is 1 to 14 percent. This horizon is moderately alkaline or strongly alkaline.
COMPETING SERIES: These are the Cadotte, Cloud Peak, Cundiyo, Goosepeak, Guffy, Kimpton, Lake Creek, Lakehelen, Lulude, Macfarlane, and Tepecreek series. Cadotte soils are very deep, do not have an E horizon, and have a lithologic discontinuity at 20 to 40 inches. Cloud Peak soils do not have a B/E horizon. Cundiyo, Goosepeak, and Macfarlane soils are very deep and do not have horizons of secondary carbonate accumulation. Guffy, Lake Creek, Lakehelen, Lulude, and Tepecreek soils do not have horizons of secondary carbonate accumulation. Kimpton soils do not have Btk horizons.
GEOGRAPHIC SETTING: Hyattville soils are on mountain sides. Slopes are 5 to 40 percent. The soils formed in material weathered from interbedded limestone, sandstone, and shale. Elevation is 7,000 to 9,500 feet. The average annual precipitation is 19 to 25 inches. The mean annual temperature is 36 to 40 degrees F. The frost-free season is 50 to 90 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bachus, Inchau, and Wallrock soils. These soils have mollic epipedons.
DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; moderate permeability.
USE AND VEGETATION: These soils are used for forestry, recreation, and wildlife habitat. Vegetation is fir, lodgepole pine, and an understory of King fescue, bluegrass, and pinegrass.
DISTRIBUTION AND EXTENT: In the Bighorn Mountains of north-central Wyoming. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Washakie County, Wyoming; 1976.