LOCATION TETONVIEW MTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, frigid Aeric Calciaquolls
TYPICAL PEDON: Tetonview loam, 0 to 2 percent slopes, irrigated native grass hay (colors are for moist soil unless otherwise noted).
Oi--0 to 2 inches; partially decomposed fibers and roots of sedges and rushes. (1 to 4 inches thick)
A1--2 to 9 inches; black (10YR 2/1) loam, dark gray (10YR 4/1) dry; weak fine granular structure; slightly hard, very friable, moderately sticky and slightly plastic; many fine and medium roots; common fine irregular tubular pores; slightly effervescent; slightly alkaline (pH 7.8); clear smooth boundary.
A2--9 to 14 inches; very dark gray (10YR 3/1) clay loam, gray (10YR 5/1) dry; moderate medium granular structure; slightly hard, friable, moderately sticky and moderately plastic; common fine roots; common fine irregular tubular pores; strongly effervescent; moderately alkaline (pH 8.0); gradual wavy boundary. (Combined thickness of A horizons is 7 to 14 inches.)
Bkg1--14 to 28 inches; grayish brown (10YR 5/2) clay loam, light gray (10YR 7/2) dry, few fine distinct yellowish brown (10YR 5/4) redox concentrations; moderate medium granular structure; hard, firm, moderately sticky and moderately plastic; common very fine roots; common medium masses of lime; violently effervescent; moderately alkaline (pH 8.0); gradual wavy boundary. (7 to 16 inches thick)
Bkg2--28 to 38 inches; grayish brown (10YR 5/2) clay loam, light gray (10YR 7/2) dry, common fine distinct yellowish brown (10YR 5/4) redox concentrations; massive; hard, firm, moderately sticky and moderately plastic; few very fine roots; few medium masses of lime; violently effervescent; moderately alkaline (pH 8.2); gradual wavy boundary. (5 to 20 inches thick)
Bkg3--38 to 60 inches; grayish brown (10YR 5/2) gravelly clay loam, light gray (10YR 7/2) dry, common medium prominent yellowish brown (10YR 5/4) and dark yellowish brown (10YR 4/4) redox concentrations; massive; very hard, firm, moderately sticky and moderately plastic; 15 percent rounded pebbles; few fine masses of lime; continuous faint lime coating on surface of pebbles; violently effervescent; moderately alkaline (pH 8.2).
TYPE LOCATION: Teton County, Montana; 2,500 feet south and 1,440 feet west of the NE corner of sec. 22, T. 25 N., R. 6 W.
RANGE IN CHARACTERISTICS:
Soil temperature - 41 to 47 degrees F.
Moisture control section - between 4 and 12 inches.
Depth to seasonal water table - 1 to 2 feet.
Depth to calcic horizon - 7 to 16 inches.
Soil phases - loam, saline, and drained.
Mollic epipedon thickness - 7 to 23 inches. The mollic epipedon may extend into the calcic horizon.
A Cg horizon is present in some pedons.
Oi horizon - mat of organic and fibrous materials. The Oi or Oe horizons vary from 1 to 4 inches thick and have less than 8 percent organic carbon.
A1 horizon - Hue: 10YR or 2.5Y
Value: 3, 4 or 5 dry, 2 or 3 moist
Chroma: 1 or 2
Texture: loam, silt loam, silty clay loam
Clay content: 18 to 35 percent
Rock fragments: 0 to 5 percent pebbles
Calcium carbonate equivalent: 0 to 15 percent
EC: 0 to 12 mmhos/cm (saline phase 4 to 12 mmhos/cm)
Reaction: pH 6.6 to 8.4
A2 horizon - Hue: 10YR or 2.5Y
Value: 4, 5 or 6 dry, 2 or 3 moist
Chroma: 1 or 2
Texture: loam, clay loam, silt loam
Clay content: 18 to 35 percent
Rock fragments: 0 to 5 percent pebbles
Calcium carbonate equivalent: 15 to 35 percent
EC: 0 to 12 mmhos/cm (saline phase 4 to 12 mmhos/cm)
Reaction: pH 7.4 to 8.4
Bkg1 horizon - Value: 5, 6, or 7 dry; 3, 4, 5, or 6 moist
Texture: loam, clay loam, silt loam, silty clay loam
Clay content: 18 to 35 percent
Redoximorphic features: none to common, faint to prominent redox concentrations
Rock fragments: 0 to 10 percent pebbles
Calcium carbonate equivalent: 15 to 35 percent
EC: 0 to 8 mmhos/cm (saline phase 4 to 8 mmhos/cm)
Reaction: pH 7.9 to 8.4
Bkg2 horizon - Hue: 10YR, 2.5Y, or 5Y
Value: 6 or 7 dry; 4, 5, or 6 moist
Texture: loam, clay loam, silt loam, silty clay loam
Clay content: 18 to 35 percent
Redoximorphic features: none to common, faint to prominent redox concentrations.
Rock fragments: 0 to 15 percent pebbles
Calcium carbonate equivalent: 15 to 35 percent
EC: 0 to 8 mmhos/cm (saline phase is 4 to 8 mmhos/cm)
Reaction: pH 7.9 to 8.4
Bkg3 horizon - Hue: 10YR, 2.5Y, or 5Y
Value: 6 or 7 dry; 4, 5, or 6 moist
Texture: loam, clay loam, sandy clay loam, silt loam, silty clay loam
Clay content: 18 to 30 percent
Redoximorphic features: none to common, faint to many redox concentrations.
Rock fragments: 5 to 35 percent--0 to 5 percent cobbles, 5 to 30 percent pebbles
Calcium carbonate equivalent: 15 to 30 percent
EC: 0 to 8 mmhos/cm (saline phase is 4 to 8 mmhos/cm)
Reaction: pH 7.9 to 8.4
COMPETING SERIES:
Antler (ND) - does not have an Oi horizon; formed in lake sediments 24 to 34 inches deep over a discontinuity of till.
Gilby (ND) - has less than 18 percent clay in the upper 20 to 40 inches of lacustrine sediments over a discontinuity of firm till.
Hamerly (ND) - formed in till; does not have an Oi horizon of decomposed roots and fibers from sedges.
Moritz (SD) - does not have an O horizon; is somewhat poorly drained; receives 20 to 24 inches precipitation.
GEOGRAPHIC SETTING:
Landform - dissected alluvial fans; stream terraces; glacial outwash plains; flood plains; closed depressions.
Elevation - 3,600 to 6,000 feet.
Slope - 0 to 4 percent.
Parent material - calcareous alluvium derived from limestone, dolomite, sandstone, or shale.
Mean annual temperature - 39 to 45 degrees F.
Mean annual precipitation - 10 to 19 inches.
Frost-free period - 70 to 115 days.
DRAINAGE AND PERMEABILITY: Poorly drained; moderately slow permeability.
USE AND VEGETATION: Tetonview soils are used for range and irrigated hayland and pasture. Potential native vegetation is northern reedgrass, Kentucky bluegrass, sedges, bulrushes, and rushes.
DISTRIBUTION AND EXTENT: Tetonview soils are not extensive. In Montana they are mainly along the eastern front and in intermountain valleys of the northern Rocky Mountains.
MLRA OFFICE RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Choteau-Conrad Area, parts of Teton and Pondera Counties, Montana, 1991.
REMARKS: Soil interpretation record: MT0466. Diagnostic horizons and features recognized in this pedon are: an organic surface layer (Oi horizon); mollic epipedon from 0 to 12 inches (A1, A2 horizons); a calcic horizon from 12 to 60 inches (Bkg1, Bkg2, Bkg3 horizons); and a particle-size control section 10 to 40 inches (A2, Bkg horizons). Tetonview soils have a frigid temperature regime and an aquic moisture regime.
Classification was changed from Typic Calciaquolls to Aeric Calciaquolls in 1993.