LOCATION HOOLIGAN MTEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive Ustic Argicryolls
TYPICAL PEDON: Hooligan silt loam, in rangeland (Colors are for dry soil unless otherwise noted).
A1--0 to 5 inches; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2) moist; weak fine and very fine subangular blocky structure parting to weak fine and very fine granular; soft, very friable, slightly sticky and slightly plastic; many very fine and few fine roots; many fine and very fine dendritic tubular pores; 5 percent gravel; slightly acid (pH 6.4); clear wavy boundary.
A2--5 to 10 inches; grayish brown (10YR 5/2) loam, very dark grayish brown (10YR 3/2) moist; weak fine and very fine subangular blocky structure parting to weak fine and very fine granular; soft, very friable, slightly sticky and slightly plastic; many very fine and few fine roots; many fine and very fine dendritic tubular pores; 10 percent mica flakes; 10 percent gravel; slightly acid (pH 6.5); clear wavy boundary. (Combined thickness of A horizons is 7 to 15 inches)
Bt1--10 to 26 inches; pale brown (10YR 6/3), gravelly clay loam, brown (10YR 5/3) moist; weak medium prismatic structure parting to moderate medium and fine subangular blocky; slightly hard, friable, moderately sticky and slightly plastic; common very fine and few fine roots; common very fine and few fine dendritic tubular pores; common faint patchy clay films on faces of peds; 10 percent mica flakes; 20 percent gravel; neutral (pH 6.7); clear wavy boundary.
Bt2--26 to 35 inches; light yellowish brown (10YR 6/4), clay loam, yellowish brown (10YR 5/4) moist; moderate medium and fine subangular blocky structure; slightly hard, friable, moderately sticky and slightly plastic; common very fine and few fine roots; common very fine and few fine dendritic tubular pores; common faint patchy clay films on faces of peds; 5 percent mica flakes; 5 percent gravel; neutral (pH 6.8); gradual wavy boundary. (Combined thickness of Bt horizons is 10 to 25 inches)
Cr1--35 to 45 inches; pale yellow (2.5Y 7/3) semi-consolidated siltite beds that crush to loam, light yellowish brown (2.5Y 6/4) moist; neutral (pH 7.1); gradual smooth boundary. (0 to 15 inches thick)
Cr2--45 to 60 inches; pale yellow (2.5Y 7/3) semi-consolidated siltite beds that crush to loam, light yellowish brown (2.5Y 6/4) moist; neutral (pH 7.0).
TYPE LOCATION: Beaverhead County, Montana; approximately 2150 feet north and 850 feet east of the SW corner of sec. 13, T. 3 S., R. 15 W., Wisdom topographic quadrangle. UTM 12T, 312368e, 5049425n. NAD 83
RANGE IN CHARACTERISTICS:
Mean annual soil temperature - 35 to 40 degrees F.
Moisture control section - between 4 and 12 inches; dry in some or all parts for 90 or more cumulative days in normal years; not dry in all parts for more than half of the cumulative days. Ustic moisture regime.
Mollic epipedon thickness - 7 to 15 inches.
Depth to Cr horizon - 20 to 40 inches.
A horizons - Value: 4 or 5 dry; 2 or 3 moist
Chroma: 1, 2 or 3
Texture: loam or silt loam
Clay content: 15 to 25 percent
Rock fragment content: 5 to 35 percent--0 to 5 percent cobbles, 5 to 30 percent gravel
Mica content: 0 to 15 percent
Reaction: pH 6.4 to 7.5
Bt horizons - Hue: 10YR or 2.5Y
Value: 5, 6, or 7 dry; 4 or 5 moist
Chroma: 2, 3, or 4
Texture: loam, clay loam, or silt loam
Clay content: 25 to 35 percent
Rock fragment content: 5 to 35 percent-- 0 to 15 percent cobbles, 5 to 20 percent gravel
Mica content: 0 to 15 percent
Reaction: pH 6.6 to 7.6
COMPETING SERIES: These are the Accola, Amsden, Barbarela, Cific, Coldspring, Croftshaw, Dewville, Gelkie, Highrye, Inchau, Kezar, Leavitt, Lucky, Lymanson, Madigan, Michelson, Miracle, Monaberg, Morset, Oro Fino, Passcreek, Philipsburg, Rainbolt, Tripit, Wellsville, Woosley, Youga, and Zade. The Accola, Amsden, Dewville, Gelkie, Leavitt, Michelson, Morset, Oro Fino, Philipsburg, and Wellsville soils are very deep and have horizons of secondary carbonate accumulation. The Barbarela and Coldspring soils are deep to a lithic contact. The Cific, Lymanson, Madigan, and Rainbolt soils have horizons of secondary carbonate accumulation. The Croftshaw and Monaberg soils are very deep. The Highrye soils are deep to a paralithic contact. The Inchau soils have BA horizons. The Kezar, Lucky, Miracle, Passcreek, and Woosley soils are moderately deep to a lithic contact. The Tripit soils are calcareous at 6 to 20 inches. The Youga soils are deep or very deep. The Zade soils have an Oi horizon.
GEOGRAPHIC SETTING:
Landform alluvial fans and hills
Elevation - 5,900 to 8,100 feet
Slope - 2 to 35 percent
Parent material - mixed alluvium and/or colluvium over residuum (siltite)
Climate - long, cold winters; cool, moist springs; short summers
Mean annual precipitation - 14 to 24 inches
Mean annual air temperature - 34 to 39 degrees F.
Frost-free period - 30 to 50 day
GEOGRAPHICALLY ASSOCIATED SOILS:
These are the
Monaberg and
Inabnit soils. The Monaberg soils are very deep and are in swales and on footslopes. The Inabnit soils are shallow and are on ridges of foothills.
DRAINAGE AND PERMEABILITY: Well drained; moderately slow permeability.
USE AND VEGETATION: Hooligan soils are used mainly for rangeland and wildlife habitat. Potential native vegetation includes Idaho fescue, bluebuch wheatgrass, as well as other grasses, forbs, and woody shrubs.
DISTRIBUTION AND EXTENT: Hooligan soils are of small extent in southwestern Montana.
MLRA OFFICE RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Beaverhead County, Montana, Big Hole Valley Area, 2005.
REMARKS: Diagnostic horizons and features recognized in this pedon are: a mollic epipedon from the soil surface to 10 inches (A1 and A2 horizons); an argillic horizon from 10 to 35 inches (Bt1 and Bt2 horizons); a paralithic contact (siltite) from 35 to 60 inches (Cr horizons); a particle-size control section from 10 to 30 inches (Bt horizons). Hooligan soils have a cryic temperature regime and an ustic moisture regime.