LOCATION LAIL WY+ID SD UTEstablished Series
TAXONOMIC CLASS: Fine, smectitic Vertic Glossocryalfs
TYPICAL PEDON: Lail silt loam, forest. (Colors are for dry soil unless otherwise stated.)
Oi--0 to 2 inches; undecomposed pine needles, twigs, bark, and cones.
Oe--2 to 3 inches; partially decomposed organic material like that of the horizon above.
A--3 to 4 inches; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; soft, very friable; common fine roots; slightly acid (pH 6.5); abrupt smooth boundary. (0 to 3 inches thick)
E--4 to 9 inches; pinkish gray (7.5YR 7/2) silt loam, brown (7.5YR 5/2) moist; weak medium platy structure parting to weak fine granular; soft, very friable; many fine and medium roots; slightly acid (pH 6.4); clear smooth boundary. (4 to 10 inches thick)
E/B--9 to 14 inches; pinkish gray (7.5YR 7/2) loam, reddish brown (5YR 5/3) moist, tongues of albic material intermixed with brown (7.5YR 5/2) clay loam, reddish brown (5YR 4/3) moist, remnants of Bt material; weak medium and coarse subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common fine and medium roots; common distinct clay films on faces of peds within the Bt remnants; neutral (pH 6.6); gradual wavy boundary. (4 to 10 inches thick)
Bt--14 to 34 inches; reddish brown (5YR 5/3) clay, reddish brown (5YR 4/3) moist; strong medium angular blocky structure parting to strong fine angular blocky; very hard, very firm, very sticky and very plastic; common fine and medium roots; many prominent clay films on faces of peds and in root channels; 5 percent pebbles; few slickenside surfaces near the base of the horizon; neutral (pH 6.8); gradual wavy boundary. (8 to 30 inches thick)
Btk--34 to 41 inches; reddish brown (5YR 5/4) clay, reddish brown (5YR 4/4) moist; moderate coarse angular blocky structure; extremely hard, very sticky and very plastic; many distinct clay films on faces of peds and discontinuous in root channels; few shiny slickenside surfaces; strongly effervescent; calcium carbonate as common prominent soft masses and concretions; moderately alkaline (pH 8.2); gradual wavy boundary. (4 to 8 inches thick)
Bk--41 to 60 inches; reddish brown (5YR 5/4) clay loam, reddish brown (5YR 4/4) moist; weak coarse prismatic structure; extremely hard, moderately sticky and moderately plastic; strongly effervescent; calcium carbonate as common prominent concretions, soft masses, seams, and streaks; moderately alkaline (pH 8.2).
TYPE LOCATION: Lincoln County, Wyoming; NW1/4 of NW1/4 sec. 32, T.32N., R119W. Sage Valley Quadrangle. 42 degrees 43 minutes 13 seconds north latitude and 111 degrees 1 minute 37 seconds west longitude.
RANGE IN CHARACTERISTICS: Depth to the base of the argillic horizon and accumulation of secondary calcium carbonate is 20 to 50 inches. Rock fragments are typically less than 5 percent and range from 0 to 15 percent. Mean annual soil temperature ranges from 32 degrees to 46 degrees F. and the mean summer soil temperature ranges from 40 degrees to 58 degrees F.
The E horizon has hue of 10YR through 5YR, value of 6 or 7 dry, and 4 through 6 moist and chroma of 2 through 4. Textures are silt loam or loam. It is slightly acid through slightly alkaline.
The E/B horizon has the same range in properties as the respective E and Bt horizons. The E portion of this horizon forms tongues and interfingers which surround the remnant Bt portions.
The Bt horizons have hue of 5YR through 10R, value of 4 through 6 dry, 3 through 5 moist, and chroma of 2 through 4. This horizon is usually clay or silty clay but clay ranges from 35 to 50 percent, silt from 15 to 50 percent, and sand from 10 to 45 percent. It is slightly acid through moderately alkaline.
The Bk horizon has hue of 5YR through 10R. It contains about 6 to 14 percent calcium carbonate equivalent, with consistent visible secondary accumulation. This horizon is moderately alkaline or strongly alkaline.
COMPETING SERIES: These are Bead and Gaylord series. Bead soils do not have horiozns of secondary carbonate accumulation. Gaylord soils do not have an albic horizon and have a transitional B/A horizon.
GEOGRAPHIC SETTING: The Lail soils are on hills, ridges, and mountain sideslopes. Slopes typically range from 3 to 50 percent. Elevations are 6,000 to 7,500 feet. These soils formed in alluvium derived from soft sedimentary red beds. The average annual precipitation is 18 to 26 inches with nearly equal amounts of precipitation occurring during all months. The mean annual temperature is 36 degrees F., the mean summer temperature is 53 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Buckskin and the Cowdrey soils. Buckskin soils have a mollic epipedon. Cowdrey soils lack a glossic horizon.
DRAINAGE AND PERMEABILITY: Well drained; medium or high runoff; slow permeability.
USE AND VEGETATION: These soils are used principally as native pastureland, recreation, and limited forestry. In some localities they are used for production of small grains. Principal native vegetation is aspen, grasses, and pine.
DISTRIBUTION AND EXTENT: Mountains of Idaho, Wyoming and the Black Hills of South Dakota. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Star Valley Area, Idaho and Wyoming, 1971.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 3 to 9 inches (A and E horizons)
Albic horizon - 4 to 9 inches (E)
Glossic horizon - 9 to 14 inches (E/B)
Argillic horizon - 14 to 41 inches (Bt, Btk)
SIR- WY0055, WY927
MLRR- E