LOCATION MIKESELL ID+MT+WYEstablished Series
TAXONOMIC CLASS: Fine, smectitic Eutric Haplocryalfs
TYPICAL PEDON: Mikesell stony silt loam - on a 30 percent north-facing slope in forest at an elevation of 2,134 meters. (Colors are for dry soils unless otherwise noted.)
Oi--0 to 1 cm; slightly decomposed needles, cones, twigs, and leaves; moderately acid (pH 6.0 chlorphenol red); abrupt wavy boundary. (0 to 1 cm thick)
Oe--1 to 3 cm; dark grayish brown (10YR 4/2) partially decomposed needles, twigs, leaves, and cones, very dark brown (10YR 2/2) moist; slightly matted; abrupt wavy boundary. (0 to 2 cm thick)
Oa--3 to 4 cm; dark gray (10YR 4/1) decomposed organic matter, black (10YR 2/1) moist; strongly acid (pH 5.3); abrupt wavy boundary. (0 to 1 cm thick)
E1--4 to 13 cm; light brownish gray (10YR 6/2) stony silt loam, grayish brown (10YR 5/2) moist; weak thick platy structure parting to weak very fine granular; slightly hard, very friable, slightly sticky and slightly plastic; many very fine and fine roots and few medium and coarse roots; common very fine tubular pores; common fine rounded iron and manganese concretions; about 10 percent gravel and 10 percent stones; moderately acid (pH 5.6); abrupt smooth boundary. (0 to 13 cm thick)
E2--13 to 30 cm; light brownish gray (10YR 6/2) stony silt loam, dark grayish brown (10YR 4/2) moist; weak coarse and very coarse subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and fine roots, and few medium, coarse, and very coarse roots; common very fine tubular pores; few fine rounded iron and manganese concretions; about 10 percent gravel and 10 percent stones; moderately acid (pH 5.7); abrupt irregular boundary. (15 to 36 cm thick)
B/E--30 to 41 cm; 90 percent light yellowish brown (10YR 6/4) cobbly clay loam, dark yellowish brown (10YR 4/4) moist; 10 percent light gray (10YR 7/2) cobbly loam, grayish brown (10YR 5/2) moist E material that occurs between peds and as coatings on and between peds; weak medium prismatic structure parting to moderate medium and fine subangular blocky; hard, friable, slightly sticky and slightly plastic; common very fine and fine roots, and few medium, coarse, and very coarse roots; common very fine tubular pores; few thin clay films on faces of peds and in pores; few fine rounded iron and manganese concretions: about 10 percent gravel and 15 percent cobbles; moderately acid (pH 5.7); abrupt wavy boundary. (5 to 13 cm thick)
Bt1--41 to 81 cm; yellowish brown (10YR 5/4) gravelly clay, dark yellowish brown (10YR 4/4) moist; few medium prominent strong brown (7.5YR 5/8) and reddish brown (2.5YR 4/4), dark reddish brown (2.5YR 3/4) moist spots of weathering rock material; weak medium prismatic structure parting to strong medium and fine subangular and angular blocky; very hard, very firm, moderately sticky and moderately plastic; few very fine and fine roots mostly between peds, and few medium, coarse and very coarse roots; few very fine tubular pores; 30 percent continuous prominent clay films of brown (10YR 5/3), brown (10YR 4/3) moist, and dark grayish brown (10YR 4/2), very dark grayish brown (10YR 3/2) moist; about 20 percent gravel and about 10 percent cobbles; moderately acid (pH 5.8); clear, wavy boundary. (20 to 50 cm thick)
Bt2--81 to 117 cm; light yellowish brown (2.5Y 6/3) cobbly clay, olive brown (2.5Y 4/3) moist; strong medium and fine angular blocky structure; very hard, very firm, moderately sticky and moderately plastic; few very fine and fine roots mostly between peds, and few medium, coarse and very coarse roots; few very fine tubular pores; 30 percent continuous distinct clay films in pores and on faces of peds; clay film colors of brown (10YR 5/3), brown (10YR 4/3) moist; about 10 percent gravel and about 15 percent cobbles; slightly acid (pH 6.2); clear wavy boundary. (20 to 41 cm thick)
Bt3--117 to 152 cm; light brownish gray (2.5Y 6/2) cobbly clay loam, grayish brown (2.5Y 5/2) moist; strong fine angular blocky structure; very hard, firm, moderately sticky and moderately plastic; few fine roots; few very fine tubular pores; 50 percent prominent and distinct clay films of yellowish brown (10YR 5/4) on faces of peds and in pores; light olive brown (2.5Y 5/3) weathering rock fragments, olive brown (2.5Y 4/3) moist; about 10 percent gravel and about 20 percent cobbles; slightly acid (pH 6.4); clear wavy boundary. (13 to 38 cm thick)
Bt4--152 to 168 cm; light brownish gray (2.5Y 6/2) clay loam, grayish brown (2.5Y 5/2) moist; strong very thick platy structure parting to weak coarse angular blocky; very hard, firm, moderately sticky and moderately plastic; few very fine roots; few very fine tubular pores; few distinct very dark brown (10YR 2/2) organic stains on faces of peds; 50 percent faint clay films on faces of peds; about 5 percent gravel and about 5 cobbles; neutral (pH 6.8); clear wavy boundary.
R--168 cm; shale or fine grained sandstone bedrock.
TYPE LOCATION: Teton County, Idaho; about 17 kilometers west of Driggs; located about 536 meters north and 458 meters west of the southwest corner of section 25, T. 5 N., R. 43 E.; Garns Mountain USGS topographic quadrangle; lat. 43 degrees 43 minutes 42 seconds N and long. 111 degrees, 19 minutes, 32.3 seconds W; NAD 83.
RANGE IN CHARACTERISTICS:
Depth to bedrock: 100 to more than 152 cm
Particle-size control section average clay: 35 to 55 percent
Particle-size control section rock fragments: 10 to 30 percent
Reaction: pH 5.3 to 6.8
Soil moisture regime: udic
Mean annual soil temperature: 1.7 to 4.8 degrees C.; cryic soil temperature regime
Mean summer soil temperature: 4.0 to 8.0 degrees C
E horizons
Value: 6 or 7 dry, 3 to 5 moist
Chroma: 2 or 3 dry or moist
pH: 5.1 to 6.5
Bt horizon
Hue: 10YR or 2.5Y dry, 10YR to 5Y moist
Value: 5 or 6 dry, 3 to 5 moist
Chroma: 2 to 7 dry or moist
Texture: CB-L, CB-CL, CB-C, GR-C, GR-SIC, CL, CBV-SIC, STV-C
Clay: 25 to 55 percent
Rock fragments: 10 to 30 percent in the upper part and 35 to 55 percent in the lower part, averaging less than 35 percent in the control section
pH: 5.1 to 7.3
COMPETING SERIES:
Foxton (WY) - moderately deep to lithic contact
Owlcan (WY) - have secondary carbonates beginning at 61cm
GEOGRAPHIC SETTING:
Parent material: alluvium, colluvium and till derived from shale, sandstone and quartzite
Landscape: mountains
Landform: mountain slope
Slopes: 8 to 60 percent
Elevation: 1,829 to 2,443 meters in Idaho and down to 1,463 meters on north slopes in Montana
Mean annual air temperature: 0.5 to 3.9 degrees C.
Mean annual precipitation: 533 to 914 mm
Frost-free period: 30 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Coldfeet (T) (ID), and Dranyon, series. Coldfeet soils have a loam-skeletal particle size class and are on slightly more convex positions. Dranyon soils have a fine-loamy particle size class and are on south facing slopes.
DRAINAGE AND PERMEABILITY: Well drained; very high runoff; very slow permeability.
USE AND VEGETATION:The major uses are timber production and some livestock grazing The native plant community is subalpine fir and lodgepole pine with an understory of Rocky mountain maple, spirea, huckleberry, mountain ash, mountain arnica and pine grass.
DISTRIBUTION AND EXTENT: Mikesell soils are moderately extensive in southeastern Idaho and western Montana. MLRA 13, 43B and 48A.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Teton Area, Idaho-Wyoming Soil Survey, 1969.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from 0 to 30 cm (Oi, Oe, Oa, E1 and E2 horizons)
Albic horizon - the zone from 4 to 30 cm (E1 and E2 horizons)
Argillic horizon - the zone from 30 to 168 cm (B/E, Bt1, Bt2, Bt3, and Bt4 horizons)
Particle-size control section - the zone from 30 to 80 cm (B/E and part of the Bt1 horizon)
Soil temperature regime: cryic
Soil moisture regime: udic
ADDITIONAL DATA:
The typical pedon was not sampled.