LOCATION TETON MT+UTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive Ustic Haplocryolls
TYPICAL PEDON: Teton loam, cropland (colors are for dry soil unless otherwise noted).
Ap--0 to 7 inches; dark gray (10YR 4/1) loam, black (10YR 2/1) moist; moderate fine granular structure; soft, very friable, nonsticky and nonplastic; many fine and very fine roots; less than 5 percent angular sandstone pebbles; slightly acid (pH 6.2); clear wavy boundary. (5 to 7 inches thick)
Bw1--7 to 15 inches; brown (10YR 5/3) loam, dark brown (10YR 3/3) moist; moderate medium prismatic structure parting to strong medium and fine subangular blocky; hard, friable, moderately sticky and moderately plastic; many fine and very fine roots; many fine and very fine pores; less than 5 percent angular sandstone pebbles; slightly acid (pH 6.2); clear wavy boundary. (8 to 20 inches thick)
Bw2--15 to 32 inches; pale brown (10YR 6/3) loam, brown (10YR 4/3) moist; weak medium and fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common fine and very fine roots; many fine and very fine pores; 10 percent angular sandstone pebbles; neutral (pH 6.8); gradual wavy boundary. (5 to 18 inches thick)
R--32 inches; hard sandstone bedrock with fractures.
TYPE LOCATION: Fergus County, Montana; 1,200 feet west and 350 feet south of the NE corner of sec. 29, T. 14 N., R. 19 E.
RANGE IN CHARACTERISTICS:
Soil temperature - 40 to 44 degrees F.
Moisture control section - between 4 and 12 inches.
Mollic epipedon thickness - 7 to 16 inches.
Depth to bedrock - 20 to 40 inches.
A horizon - Value: 3, 4, or 5 dry; 2 or 3 moist
Chroma: 1, 2, or 3
Texture: loam, sandy loam, fine sandy loam
Clay content: 10 to 27 percent
Rock fragments: 0 to 30 percent--0 to 5 percent cobbles; 5 to 25 percent pebbles
Reaction: pH 6.1 to 7.3
Bw1 horizon - Hue: 10YR or 7.5YR
Value: 5 or 6 dry; 3, 4, or 5 moist
Chroma: 2, 3, or 4
Texture: loam or clay loam
Clay content: 18 to 35 percent
Rock fragments: 0 to 30 percent--0 to 5 percent cobbles; 5 to 25 percent pebbles
Reaction: pH 6.1 to 7.3
Bw2 horizon - Hue: 10YR or 2.5Y
Value: 5, 6, or 6 dry; 4, 5, or 6 moist
Chroma: 2, 3, or 4
Texture: loam or clay loam
Clay content: 18 to 35 percent
Rock fragments: 0 to 35 percent--0 to 10 percent cobbles; 5 to 25 percent pebbles
Reaction: pH 6.6 to 8.4
COMPETING SERIES:
Auzqui (WY) - is very deep.
Babb (MT) - is very deep; has a calcic horizon.
Bynum (MT) - has a paralithic contact at 20 to 40 inches; has horizon of secondary carbonate accumulation.
Emerald (CO) - is very deep.
Redcloud (CO) - is very deep; has horizon of secondary carbonate accumulation.
Tamp (CO) - is very deep.
Tampico (NM) - is very deep.
Thayne (WY) - is very deep; has horizon of secondary carbonate accumulation.
Tilton (CO) - is very deep.
Uhl (WY) - is very deep.
Wrenman (WY) - has horizon of secondary carbonate accumulation.
GEOGRAPHIC SETTING:
Landform - hills and mountains.
Elevation - 4,600 to 7,000 feet.
Slope - 2 to 65 percent.
Parent material - residuum or colluvium from sandstone. Climate - long cold winters; cool moist springs; short summers.
Mean annual precipitation - 19 to 30 inches.
Mean annual temperature - 38 to 44 degrees F.
Frost-free period - 50 to 70 days.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.
USE AND VEGETATION: Teton soils are used mainly for rangeland, cropland, and pastureland. Potential native vegetation is mainly bearded wheatgrass, rough fescue, needlegrasses, Idaho fescue, mountain brome, forbs, and shrubs.
DISTRIBUTION AND EXTENT: Teton soils are of moderate extent in central and southern Montana and Utah.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Reconnaissance Soil Survey of central Montana, 1946.
REMARKS: Soil Interpretations Records: MT8058, MT8076, and MT0693. Diagnostic horizons and features recognized in this pedon are: a mollic epipedon from the mineral soil surface to 15 inches (Ap and Bw1 horizons); a cambic horizon from 15 to 32 inches (Bw2 horizon); a lithic contact at 32 inches (R horizon); a particle size control section from 10 to 32 inches (Bw1 and Bw2 horizons). Teton soils have a cryic temperature regime and an ustic moisture regime.