LOCATION DRA ID+WYEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Calcic Argixerolls
TYPICAL PEDON: Dra silt loam on a mountain slope with 27 percent slope at an elevation of 2,075 meters. (Colors are for dry soil unless otherwise noted.)
Oe--0 to 4 cm; very dark brown (7.5YR 2.5/2) moderately decomposed plant material, very dark brown (7.5YR 2.5/2) moist; clear smooth boundary. (0 to 7 cm thick)
A1--4 to 13 cm; dark grayish brown (10YR 4/2) silt loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; slightly hard, very friable, slightly sticky and nonplastic; many very fine and common fine, medium and very coarse roots; many very fine and common fine tubular and common fine irregular pores; 5 percent gravel; neutral (pH 7.0); clear smooth boundary.
A2--13 to 28 cm; brown (10YR 4/3) silt loam, very dark brown (7.5YR 2.5/2) moist; weak medium subangular blocky structure; moderately hard, very friable, slightly sticky and nonplastic; common very fine, fine and medium and few coarse roots; common fine tubular and irregular pores; 5 percent gravel; neutral (pH 7.0); clear wavy boundary. (Combined thickness of A horizons is 21 to 30 cm)
Bt--28 to 45 cm; dark yellowish brown (10YR 4/4) very cobbly silty clay loam, dark brown (10YR 3/3) moist; moderate coarse subangular blocky structure parting to strong medium subangular blocky; very hard, friable, moderately sticky and moderately plastic; common very fine and few fine and medium roots; many very fine and fine tubular, and common fine irregular pores; many (20 percent) calcium carbonate coats on bottoms of cobbles; few (10 percent) discontinuous prominent clay films; 20 percent gravel, 25 percent cobbles, and 10 percent flagstones; neutral (pH 7.2); clear wavy boundary.
Btk--45 to 73 cm; yellowish brown (10YR 5/4) very cobbly silty clay loam, brown (7.5YR 4/3) moist; strong medium subangular blocky structure; very hard, friable, very sticky and moderately plastic; few fine and medium roots; common fine irregular and common very fine and fine tubular pores; many (80 percent) calcium carbonate coats on bottoms of rock fragments; few (20 percent) discontinuous prominent clay films; common (3 percent) fine masses of calcium carbonate in the matrix; 25 percent gravel and 25 percent cobbles; very slightly effervescent; slightly alkaline (pH 7.8); gradual wavy boundary. (Combined thickness of Bt and Btk horizons is 20 to 53 cm)
2Bk1--73 to 87 cm; white (10YR 8/1) cobbly loam, very pale brown (10YR 7/4) moist; moderate coarse subangular blocky structure; soft, very friable, slightly sticky and nonplastic; very few fine and medium roots; common very fine and fine tubular pores; many (70 percent) calcium carbonate coats on all surfaces of rock fragments; many (30 percent) calcium carbonate masses along pores and in the matrix; 5 percent krotovinas; 15 percent gravel and 10 percent cobbles; strongly effervescent (45 percent calcium carbonate equivalent); slightly alkaline (pH 7.8); clear wavy boundary. (14 to 37 cm thick)
2Bk2--87 to 152 cm; yellow (10YR 8/8) loam, very pale brown (10YR 7/3) moist; weak fine subangular blocky structure; slightly hard, very friable, nonsticky and nonplastic; very few fine roots; common very fine irregular pores; many (40 percent) calcium carbonate masses along pores and in the matrix; 10 percent gravel; violently effervescent (53 percent calcium carbonate equivalent); moderately alkaline (pH 8.0).
TYPE LOCATION: Teton County, Idaho; about 3.7 km southwest of Victor; 594 meters east and 594 meter north of the southwest corner of section 18, T. 3 N., R. 46 E.; Victor USGS topographic quadrangle; lat. 43 degrees, 34 minutes, and 57.1 seconds N. and long. 111 degrees, 4 minutes, 26.9 seconds W., NAD83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness: 40 to 50 cm
Depth to argillic horizon: 25 to 50 cm
Depth to calcic horizon (2Bk horizon): 65 to 100 cm
Particle size control section average rock fragments: 40 to 75 percent
Particle size control section average clay: 27 to 35 percent
Reaction: neutral to moderately alkaline
Soil moisture regime: xeric
Mean annual soil temperature: 5.0 to 8.0 degrees C. (frigid soil temperature regime)
Mean summer soil temperature: 15.0 to 18.3 degrees C.
A horizons
Hue: 7.5YR or 10YR moist
Value: 2 to 3 moist
Chroma: 1 to 3 moist
Rock Fragments: 5 to 50 percent total rock fragments; 5 to 20 percent gravel, 0 to 20 percent cobbles, and 0 to 25 percent stones
Bt or Btk horizon
Hue: 7.5YR or 10YR moist
Value: 3 or 4 moist
Chroma: 3 or 4 moist
Effervescence: none to very slight
Fine-earth texture: SIL or SICL with 50 to 75 percent total rock fragments; 10 to 55 gravel, 10 to 40 percent cobbles, 0 to 40 percent flagstones, and 0 to 40 percent stones
2Bk horizon
Hue: 7.5YR or 10YR moist
Value: 4 to 6 moist
Chroma: 3 to 6 moist
Effervescence: strong to violent
Calcium carbonate equivalent: 40 to 55 percent
Fine-earth texture: L with 15 to 65 percent total fragments; 5 to 20 percent gravel, 0 to 10 percent cobbles, and 0 to 50 percent stones
COMPETING SERIES: These are the Amelar, Broad, Custco, Drage, Milk (T), Rawnjay, Remount, Scalfar, Searla, Sheepcreek, Small, and Swampydraw (T) series. Amelar soils have a mollic epipedon that is less than or equal to 38 cm thick and secondary carbonates from a depth of 25 to 36 cm. Broad, Milk (T), Sheepcreek, and Small soils are moderately deep. Custco soils have a mollic epipedon that is less than or equal to 38 cm thick and less than 27 percent clay in the particle size control section. Drage, Remount, and Searla soils lack a calcic horizon. Rawnjay soils have a calcic horizon that contains 5 to15 percent calcium carbonate in the upper part of the calcic horizon and 15 to 40 percent in the lower part of the calcic horizon. Scalfar soils have a mollic epipedon that is less than or equal to 36 cm thick. Swampydraw soils have an argillic horizon beginning above 25 cm.
GEOGRAPHIC SETTING:
Landscape: mountains
Landform: mountain slope
Elevation: 1,797 to 2,398 meters
Slope: 12 to 60 percent
Parent material: sandstone and quartzite colluvium with loess influence
Mean annual air temperature: 3.3 to 5.6 degrees C.
Mean annual precipitation: 533 to 914 mm
Frost free period: 50 to 90 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the, Dranyon, Ezbin, and Pinochle series. Dranyon soils are in concave swales and are fine-loamy. Ezbin soils are on linear positions and lack a calcic horizon. Pinochle soils are on convex positions and are moderately deep.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class: well
Runoff: high
Saturated hydraulic conductivity: moderately high
USE AND VEGETATION:
Major uses: livestock grazing and wildlife habitat
Dominant native vegetation: mountain big sagebrush, mountain snowberry, bluebunch wheatgrass, mountain brome, and tapertip hawksbeard
DISTRIBUTION AND EXTENT:
Distribution: Southeastern Idaho and Western Wyoming, MLRA 43B
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:
Diagnostic horizons and soil characteristics recognized in this pedon are:
Mollic epipedon: from a depth of 4 to 45 cm
Argillic horizon: from a depth of 28 to 73 cm
Calcic horizon: from a depth of 73 to 152 cm
Particle size control section: from a depth of 28 to 73 cm
Soil temperature regime: frigid
Soil moisture regime: xeric
Typical location relocated within Teton County, ID in 2010 because the soil was not found at the old location. This revision in 2010 also changes the classification of this series. It was formerly classified as fine-loamy, mixed, superactive Xeric Argicryolls.
ADDITIONAL DATA:
Typical pedon was not sampled.