LOCATION FELT ID+WYEstablished Series
TAXONOMIC CLASS: Coarse-loamy over sandy or sandy-skeletal, mixed, superactive, frigid Typic Calcixerolls
TYPICAL PEDON: Felt silt loam on a fan remnant with 4 percent slope at 1937 meters elevation. (Colors are for dry soil unless otherwise noted.)
Ap1-- 0 to 11 cm; brown (10YR 5/3) silt loam, dark brown (10YR 3/3) moist; moderate medium subangular blocky structure parting to moderate fine granular; moderately hard, friable, slightly sticky and slightly plastic; common very fine roots; many very fine irregular pores; 11 percent calcium carbonate equivalent; strongly effervescent; slightly alkaline (pH 7.7); abrupt smooth boundary.
Ap2-- 11 to 25 cm; brown (10YR 5/3) silt loam; dark brown (10YR 3/3) moist; moderate medium subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common very fine roots; few medium tubular and many very fine tubular pores; common calcium carbonate masses; 11 percent calcium carbonate equivalent; strongly effervescent; moderately alkaline (pH 7.9); abrupt wavy boundary. (Combined thickness of the Ap or A horizons is 20 to 36 cm)
Bk-- 25 to 60 centimeters; light gray (10YR 7/2) silt loam, brown (10YR 5/3) moist; weak coarse prismatic structure parting to weak coarse subangular blocky; very hard, friable, slightly sticky and slightly plastic; common very fine roots; many very fine and few medium tubular, and common very fine dendritic tubular pores; many calcium carbonate masses on surfaces along pores; 29 percent calcium carbonate equivalent; violently effervescent; moderately alkaline (pH 8.3); gradual wavy boundary. (8 to 63 cm thick)
Bkq1-- 60 to 78 cm; light gray (10YR 7/2) very gravelly silt loam, brown (10YR 4/3) moist; weak coarse prismatic structure parting to weak coarse subangular blocky; hard, very friable, slightly sticky and slightly plastic; moderately few very fine roots; common very fine irregular and many very fine tubular pores; silica on bottom surfaces of rock fragments; discontinuous calcium carbonate coats on bottom surfaces of rock fragments; many calcium carbonate masses; 30 percent calcium carbonate equivalent; 30 percent limestone gravel, 5 percent limestone cobbles; violently effervescent; moderately alkaline (pH 8.3); gradual wavy boundary. (0 to 18 cm thick)
2Bkq2-- 78 to 152 cm; light brownish gray (10YR 6/2) extremely gravelly sand, brown (10YR 5/3) moist; single grain; interstitial pores; continuous silica and calcium carbonate coats on bottom surfaces of all rock fragments; 61 percent calcium carbonate equivalent; 65 percent limestone gravel, 10 percent limestone cobbles; strongly effervescent; moderately alkaline (pH 8.4)
TYPE LOCATION: Teton County, Idaho; about 5.5 kilometers southeast of Driggs; 313 meters east and 84 meters south of the southwest corner of section 8, T. 4 N., R. 46 E.; Driggs USGS topographic quadrangle; lat. 43 degrees, 41 minutes, 35.3 seconds N. and long. 111 degrees, 3 minutes, 24.6 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 20 to 26 cm
Control section total clay range: 10 to 18 percent above the discontinuity and 2 to 5 percent below the discontinuity
Control section carbonate clay: 0 to 10 percent
Control section rock fragments: 0 to 35 percent above the discontinuity (averages less than 15 percent) and 15 to 75 percent below the discontinuity
Depth to calcic horizon: 20 to 36 cm
Calcium carbonate equivalent: 25 to 61 percent in the calcic horizon with less than 40 percent average in the control section
Depth to sandy-skeletal material (2Bkq2 horizon): 40 to 90 cm
Mean annual soil temperature: 6 to 8 degrees C.
Mean summer soil temperature: 15 to 18.9 degrees C. (frigid soil temperature regime)
Ap or A
Hue: 7.5YR or 10YR moist
Chroma: 2 or 3 moist
Effervescence: strong or violent
Bk or Bkq
Hue: 7.5YR or 10YR dry
Value: 4 or 5 moist
Texture: SIL or L with 0 to 35 percent total fragments; 0 to 35 percent gravel, 0 to 5 percent cobbles
Effervescence: strong or violent
2Bkq or 2Bk
Value: 4 or 5 moist
Chroma: 2 or 3 moist
Texture: LS or S with 15 to 75 percent total fragments; 0 to 65 percent gravel, 0 to 15 percent cobbles
COMPETING SERIES: There are no soil series in the same family.
GEOGRAPHIC SETTING:
Landscape: alluvial and outwash plains
Landform: fan remnants and stream terraces
Elevation: 1801 to 2001 meters
Slope: 0 to 20 percent
Parent material: mixed alluvium
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 Feltonia, Arimo, Altaby, and Alpine soil series. None of these soils have surface effervescence. Of the geographically associated soils, Feltonia soils are found on the highest positions on fan remnants and stream terraces. Feltonia soils have a coarse-loamy particle size class. Arimo and Altaby soils are found in slightly lower positions on fan remnants than Feltonia soils and have a coarse-loamy over sandy or sandy-skeletal particle size class. Alpine soils are in concave swales on fan remnants, have a loamy-skeletal particle size class, and have carbonatic mineralogy.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well drained
Runoff: low
Saturated hydraulic conductivity: moderately high in the upper part and very high in the lower part
USE AND VEGETATION:
Major uses: irrigated areas are used primarily for small grains, seed potatoes, hay and pasture; nonirrigated areas are used for pasture and range. Dominant native vegetation: bluebunch wheatgrass, bluegrass, prairie junegrass, phlox, yarrow, mountain big sagebrush, and rabbitbrush
DISTRIBUTION AND EXTENT:
Distribution: Eastern Idaho and Western Wyoming, 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 2008 changes the type location and classification of this series. It was formerly classified as coarse-loamy over sandy or sandy-skeletal, mixed, superactive Xeric Calcicryolls.
Diagnostic horizons and soil characteristics recognized in this pedon are:
Mollic epipedon: from a depth of 0 to 25 cm
Calcic horizon: from a depth of 25 to greater than 152 cm
Particle size control section: from a depth of 25 to 100 cm
Calcium carbonate equivalent, weighted average in particle size control section: about 38 percent
Surface effervescence: strong from a depth of 0 to 25 cm
Soil temperature regime: frigid
Soil moisture regime: xeric