LOCATION DRIGGS ID+WYEstablished Series
TAXONOMIC CLASS: Fine-loamy over sandy or sandy-skeletal, mixed, superactive, frigid Calcic Argixerolls
TYPICAL PEDON: Driggs loam, fallow field; on a fan remnant with 1 percent slope at an elevation of 1850 m. (Colors are for dry soil unless otherwise noted.)
Ap1--0 to 8 cm; brown (10YR 5/3) loam, brown (7.5YR 2.5/2) moist; moderate very fine, medium and coarse granular structure; firm, friable, slightly sticky and slightly plastic; common very fine and few fine roots; common very fine tubular and irregular pores; 1 percent fine and medium gravel; slightly acid (pH 6.2); abrupt smooth boundary.
Ap2--8 to 20 cm; dark grayish brown (10YR 4/2) silt loam, dark brown (7.5YR 3/2) moist; strong medium and coarse subangular blocky structure; very firm, friable, slightly sticky and slightly plastic; moderately few very fine roots; common very fine tubular and irregular pores; 1 percent fine and medium gravel; slightly acid (pH 6.2); clear smooth boundary. (Combined thickness of the Ap horizons is 12 to 29 cm)
Bt1--20 to 39 cm; yellowish brown (10YR 5/4) silt loam, dark brown (7.5YR 3/3) moist; moderate very coarse prismatic structure parting to strong coarse subangular blocky; very hard, friable, moderately sticky, moderately plastic; moderately few very fine roots; common very fine and few fine tubular pores; 5 percent faint clay films; 3 percent fine and medium gravel; slightly alkaline (pH 7.4); clear wavy boundary. (10 to 20 cm. thick)
Bt2--39 to 78 cm; yellowish brown (10YR 5/4) clay loam, brown (7.5YR 4/4) moist; moderate very coarse prismatic structure parting to strong coarse subangular blocky; very hard, friable, moderately sticky, moderately plastic; moderately few very fine roots; common very fine and few fine tubular pores; 10 percent distinct clay films; 10 percent fine and medium gravel; slightly alkaline (pH 7.6); abrupt wavy boundary. (Combined thickness of the Bt horizons is 18 to 58 cm)
Bk1--78 to 89 cm; very pale brown (10YR 7/3) gravelly loam, light brown (7.5YR 6/3) moist; massive; very hard, friable, slightly sticky and slightly plastic; common very fine tubular and irregular pores; 70 percent calcium carbonate masses, discontinuous calcium carbonate coats around all rock fragments; 25 percent gravel; violently effervescent (39 percent calcium carbonate); slightly alkaline (pH 7.8); abrupt wavy boundary. (0 to 12 cm)
2Bk2--89 to 115 cm; light gray (10YR 7/2) extremely gravelly coarse sand, brown (10YR5/3) moist; single grain; loose; many interstitial pores; discontinuous calcium carbonate coats around all rock fragments; few silans on bottoms of rock fragments; 80 percent fine to coarse gravel; strongly effervescent (25 percent calcium carbonate); moderately alkaline (pH 8.0); clear wavy boundary.
2Bk3--115 to 145 cm; light gray (10YR 7/2) extremely gravelly coarse sand, brown (10YR5/3) moist; single grain; loose; many interstitial pores; discontinuous calcium carbonate coats on bottoms of all rock fragments; few silans on bottoms of rock fragments; 80 percent fine to coarse gravel, 5 percent cobbles; strongly effervescent (25 percent calcium carbonate); moderately alkaline (pH 8.0); clear wavy boundary. (Combined thickness of the 2Bk horizons is 40 to 115 cm)
2Bk4--145 to 152 cm; yellowish brown (10YR 5/4) very gravelly sand, brown (10YR 4/3) moist; single grain; loose; many interstitial pores; 25 percent discontinuous calcium carbonate coats on bottoms of rock fragments; 40 percent gravel; very slightly effervescent (21 percent calcium carbonate); slightly alkaline (pH 7.8).
TYPE LOCATION: Teton County, Idaho; 2.3 kilometers southeast of Felt; 465 meters east and 132 meters south of the northwest corner of section 17, T. 6 N., R. 45 E.; Tetonia USGS topographic quadrangle; lat. 43 degrees, 51 minutes, 10.1 seconds N. and long. 111 degrees, 10 minutes, 28.3 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 25 to 44 cm.
Control section total clay range: 20 to 30 percent in the upper part and 1 to 8 percent in the lower part
Rock fragments: 2 to 20 percent in the upper part and,35 to 95 percent in the lower part
Depth to argillic horizon: 12 to 29 cm
Depth to calcic horizon: 44 to 86 cm
Calcium carbonate equivalent: 15 to 40 percent in the calcic horizon
Depth to sandy-skeletal material (2Bk horizon): 50 to 89 cm
Mean annual soil temperature: 6 to 8 degrees C.
Mean summer soil temperature: 15 to 18.9 degrees C. (frigid soil temperature regime)
A or Ap horizons
Hue: 10YR and 7.5YR moist
Value: 2.5 or 3 moist
Chroma: 2 or 3 moist
Rock fragments: 0 to 2 percent gravel
Bt horizons
Hue: 10YR and 7.5YR moist
Value: 3 or 4 moist
Chroma: 3 or 4 moist
Fine-earth texture: SIL, CL, L Rock fragments: 2 to 20 percent gravel
Bk horizon (when present)
Hue: 10YR and 7.5YR moist
Value: 4 to 6 moist moist
Effervesence: strong to violent
Rock fragments: 25 to 55 percent gravel
Soil reaction: slightly alkaline to moderately alkaline
2Bk horizons
Value: 4 to 6 moist
Chroma: 3 or 4 moist
Fine-earth texture: COS, S, LS
Effervesence: slight to violent
Rock fragments: 75 to 95 percent total, 20 to 85 percent gravel, 0 to 50 percent cobbles, and 0 to 10 percent stones
COMPETING SERIES: These are the Bess, Cedarpoint, Chesnimnus, Fewkes, Justesen, McCarey, Pegram (T), Pinehollow (T), Redpine (T), Vicking, and Vickton series. Bess, Cedarpoint, Fewkes, Justesen, and Vicking do not have a lithologic discontinuity. Chesnimnus has a lithologic discontinuity that begins at a depth greater than 89 cm. McCarey, Pinehollow, and Redpine are moderately deep. Vickton is deep. Pegram averages greater than 27 percent clay in the particle size control section.
GEOGRAPHIC SETTING:
Landscape: alluvial and outwash plains
Landform: fan remnants
Elevation: 1808 to 1926 meters
Slope: 0 to 30 percent
Parent material: mixed alluvium with loess influence
Mean annual air temperature: 3.3 to 6.7 degrees C
Mean annual precipitation: 305 to 457 mm
Frost free period: 40 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Alpine, Snyderville, and St. Anthony series. Alpine soils are on slightly higher positions on fan remnants and do not have an argillic horizon. Snyderville and St. Anthony soils are on similar landforms. Snyderville soils are in the linear and concave positions and do not have a calcic horizon. St. Anthony soils are in concave swales and do not have an argillic horizon.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well drained
Runoff: low
Saturated hydraulic conductivity: moderately high in the control section and very high below the discontinuity
USE AND VEGETATION:
Major uses: irrigated areas are used primarily for small grains, potatoes, hay and pasture; nonirrigated areas are used for pasture and limited production of small grains and hay. Dominant native vegetation: mountain big sagebrush, bluebunch wheatgrass, arrowleaf balsamroot, snowberry, antelope bitterbrush
DISTRIBUTION AND EXTENT:
Distribution: Southeastern Idaho, MLRA 13
Extent: the series is not extensive
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Teton County, Idaho, 1975; Teton Area, Idaho-Wyoming Soil Survey
REMARKS: This revision in 2007 changes the type location and classification of this series. It was formerly classified as fine-loamy over sandy or sandy-skeletal, mixed superactive Xeric Argicryolls.
Diagnostic horizons and soil characteristics recognized in this pedon are:
Mollic epipedon: from a depth of 0 to 39 cm
Argillic horizon: from a depth of 20 to 78 cm
Calcic horizon: from a depth of 78 to 145 cm
Particle size control section: from a depth of 20 to 100 cm; 20 to 78 cm is a fine-loamy argillic horizon over a 11cm thick transitional horizon over sandy-skeletal material at 89cm
Soil temperature regime: frigid
Soil moisture regime: xeric