LOCATION SLIPPERYJIM WY
Tentative Series
ALB-DPG-DEW
04/2025
SLIPPERYJIM SERIES
Depth class: Very deep
Drainage class: Well drained
Saturated hydraulic conductivity class: Moderately low
Parent material: Alluvium weathered from interbedded sedimentary rocks
Geomorphic location: Alluvial fans, alluvial flats, or stream terraces
Slope range: 0 to 8 percent
Mean annual temperature: 4.5 degrees C (40 degrees F)
Mean annual precipitation: 205 millimeters (8 inches)
TAXONOMIC CLASS:
Fine-silty, mixed, superactive, frigid Sodic Ustic Haplocambids
TYPICAL PEDON: Slipperyjim silt loam in rangeland. (Colors are for dry soil unless otherwise noted.)
A--0 to 7 centimeters; very pale brown (10YR 7/3) silt loam, dark yellowish brown (10YR 4/6) moist; strong very thick platy structure; hard, very firm, moderately sticky, moderately plastic; few very fine roots throughout; many very fine and fine vesicular pores; slightly effervescent; very strongly alkaline (pH 9.6); clear smooth boundary.
Bn--7 to 25 centimeters; light yellowish brown (10YR 6/4) silty clay loam, dark yellowish brown (10YR 4/6) moist; moderate coarse subangular blocky structure; slightly hard, friable, moderately sticky, moderately plastic; few very fine, fine, medium, and coarse roots throughout; many very fine and fine tubular pores; slightly effervescent; very strongly alkaline (pH 9.6); clear smooth boundary.
BCn--25 to 52 centimeters; light yellowish brown (10YR 6/4) silt loam, dark yellowish brown (10YR 4/6) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky, slightly plastic; few very fine and fine, common medium and coarse roots throughout; many very fine and fine tubular pores; slightly effervescent; very strongly alkaline (pH 9.6); gradual smooth boundary.
C1--52 to 88 centimeters; light yellowish brown (10YR 6/4) silty clay loam, dark yellowish brown (10YR 4/4) moist; massive; moderately hard, firm, moderately sticky, moderately plastic; few very fine and fine roots throughout; few very fine and fine tubular pores; slightly effervescent; very strongly alkaline (pH 9.6); gradual smooth boundary.
C2--88 to 128 centimeters; pale brown (10YR 6/3) silty clay loam, brown (10YR 4/3) moist; massive; moderately hard, firm, moderately sticky, moderately plastic; few very fine and fine roots throughout; few very fine and fine tubular pores; slightly effervescent; very strongly alkaline (pH 9.6); gradual smooth boundary.
C3--128 to 200 centimeters; pale brown (10YR 6/3) silty clay loam, dark yellowish brown (10YR 4/4) moist; massive; moderately hard, firm, moderately sticky, moderately plastic; few very fine and fine roots throughout; few very fine and fine tubular pores; slightly effervescent; very strongly alkaline (pH 9.6).
TYPE LOCATION:
Sweetwater County, WY
USGS Quadrangle: Austin Ranch
Latitude: 41.6427556
Longitude: -109.5713194
Datum: WGS84
Coordinates source: Hand-held GPS
RANGE IN CHARACTERISTICS:
Thickness of ochric epipedon: 4 to 7 centimeters
Depth to cambic horizon: 4 to 24 centimeters
Depth to sodic properties: 0 to 24 centimeters
Particle-size control section (weighted averages):
Clay content-23 to 28 percent
Sand content-2 to 14 percent
Total rock fragments-0 to 5 percent
A horizon:
Hue-10YR or 2.5Y
Value-6 or 7 dry; 3 or 4 moist
Chroma-3 dry; 3 to 6 moist
Texture (less than 2 mm fraction)-Silt loam
Clay content-16 to 26 percent
Rock fragments-0 to 5 percent; 0 to 1 percent channers, 0 to 5 percent gravels
Calcium carbonate equivalent-1 to 15 percent
Sodium absorption ratio-0 to 25
Reaction-pH 7.8 to 9.6
Thickness-4 to 7 centimeters
Bw/Bk horizon (s) (when present):
Hue-2.5Y
Value-5 or 6 dry; 4 moist
Chroma--3 or 4
Texture (less than 2 mm fraction)-Silt loam or silty clay loam
Clay content-23 to 34 percent
Rock fragments-0 to 5 percent; 0 to 1 percent channers, 0 to 5 percent gravels
Calcium carbonate equivalent-3 to 5 percent
Sodium absorption ratio-0 to 3
Reaction-pH 7.8 to 8.4
Thickness-0 to 45 centimeters
Bkn/BCkn/BCny horizon (s):
Hue-10YR or 2.5Y
Value-5 to 7 dry; 4 or 5 moist
Chroma-3 to 6
Texture (less than 2 mm fraction)-Silt loam, silty clay loam, silty clay, or loam
Clay content-15 to 40 percent
Rock fragments-0 to 10 percent; 0 to 4 percent channers, 0 to 10 percent gravels
Calcium carbonate equivalent-3 to 15 percent
Sodium absorption ratio-13 to 25
Reaction-pH 8.5 to 9.6
Thickness-43 to 186 centimeters
C horizon (s):
Hue-10YR or 2.5Y
Value-5 or 6 dry; 4 moist
Chroma-3 or 4
Texture (less than 2 mm fraction)-Silt loam, silty clay loam, or silty clay
Clay content-20 to 41 percent
Rock fragments-0 to 10 percent; 0 to 10 percent gravels
Sodium absorption ratio-0 to 25
Reaction-pH 7.8 to 9.6
Thickness-105 to 148 centimeters
COMPETING SERIES:
There are no competing series
GEOGRAPHIC SETTING:
Parent material: Alluvium weathered from interbedded sedimentary rocks
Landform: Alluvial fans, alluvial flats, or stream terraces
Slope: 0 to 8 percent
Mean annual air temperature: 2.5 to 7.0 degrees C (37 to 45 degrees F)
Mean annual precipitation: 180 to 230 mm (7 to 9 inches)
Frost-free period: 50 to 100 days
Elevation: 1,870 to 2,310 meters (6,140 to 7,580 feet)
Climate: Long, cold winters; cool, moist springs; short, warm summers
GEOGRAPHICALLY ASSOCIATED SOILS:
None listed.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: Well drained
Saturated hydraulic conductivity: 0.5 to 1.5 m/sec
USE AND VEGETATION:
Slipperyjim soils are primarily used for rangeland. The potential native vegetation is Gardener's saltbush, bottlebrush squirreltail, greasewood, Indian ricegrass, basin wildrye, bud sagebrush, and western wheatgrass.
DISTRIBUTION AND EXTENT:
Slipperyjim soils are of moderate extent in southwestern Wyoming; MLRA 34A.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED:
Sweetwater County, WY 2023. Slipperyjim series is derived from a local area.
REMARKS:
Typical Pedon Taxonomic Features:
Ochric epipedon-0 to 7 centimeters (A horizon)
Cambic horizon-7 to 52 centimeters (Bn and BCn horizons)
Sodic properties- 0 to 200 centimeters (A, Bn, BCn, C1, C2, and C3 horizons)
Particle-size control section-25 to 100 centimeters
Taxonomic version: Keys to Soil Taxonomy, 13th edition, (2022)
National Cooperative Soil Survey
U.S.A.