LOCATION GUTRIDGE                OR

Established Series
IRD. RJO/DAL/KMS
01/2019

GUTRIDGE SERIES

Landscape--mountains
Landform--mountain slopes
Slope--0 to 90 percent
Parent material-- thick mantle of volcanic ash over colluvium derived from metasedimentary rock and sandstone
Mean annual precipitation--about 720 mm
Mean annual air temperature--about 4 degrees C
Depth class--deep to lithic contact
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Ashy over loamy-skeletal, amorphic over isotic, frigid Typic Udivitrands

TYPICAL PEDON: Gutridge gravelly ashy silt loam on a 45-percent, planar, north-facing slope at an elevation of 1475 m (Soil textures are apparent field textures.)

Oi--0 to 5 cm; needles and twigs

A--5 to 23 cm; gravelly ashy silt loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 3/4) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; weakly smeary; common very fine, fine, and medium and few coarse roots; common fine irregular pores; 15 percent gravel and 5 percent stones; slightly acid (pH 6.5); clear wavy boundary

Bw--23 to 46 cm; gravelly ashy silt loam, very pale brown (10YR 7/4) dry, dark yellowish brown (10YR 4/4) moist; weak medium and fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; weakly smeary; common fine and medium and few coarse roots; few fine tubular pores; 25 percent gravel and 5 percent stones; moderately acid (pH 6.0); abrupt wavy boundary

EBb--46 to 56 cm; very gravelly loam, very pale brown (10YR 7/4) dry, yellowish brown (10YR 5/6) moist; moderate fine and very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and few medium roots; common fine tubular pores; 45 percent gravel; moderately acid (pH 6.0); clear wavy boundary

2Bwb--56 to 76 cm; extremely gravelly loam, very pale brown (10YR 7/4) dry, brownish yellow (10YR 6/6) moist; moderate very fine subangular blocky structure; hard, friable, moderately sticky and slightly plastic; few fine and medium roots; common fine irregular pores; 65 percent gravel; moderately acid (pH 6.0); clear wavy boundary

2BCb--76 to 117 cm; extremely gravelly sandy loam, very pale brown (10YR 8/4) dry, brownish yellow (10YR 6/6) moist; moderate very fine subangular blocky structure; hard, friable, slightly sticky and nonplastic; few fine and medium roots; common fine irregular pores; 80 percent gravel; moderately acid (pH 6.0); abrupt irregular boundary

2R--117 cm; argillite

TYPE LOCATION: Baker County, Oregon, in the NE1/4NE1/4NE1/4 of section 5, T. 7 S., R. 46 E.; Halfway U.S. Geological Survey quadrangle; latitude 44.9919970, longitude -117.1060720, datum WGS 84 (source of coordinates unknown)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--3 to 6 degrees C
Mean summer soil temperature--7 to 11 degrees C
Mean winter soil temperature--0 to 2 degrees C
Soil moisture control section--dry 30 to 45 days in summer
Depth to lithic contact--100 to 150 cm
Thickness of ash-influenced layers--40 to 55 cm

Estimated properties of layers influenced by volcanic ash
*Ammonium oxalate extractable Al + 1/2 Fe--1 to 3 percent
*0.02- to 2.0-mm fraction--40 to 60 percent
*Glass content in 0.02- to 2.0-mm fraction--60 to 90 percent
*1/3-bar bulk density--0.65 to 1.00 g/cm3
*Phosphate retention--40 to 80 percent
*15-bar water retention--5 to 12 percent (dried samples)
*8 x Si plus 2 x Fe--5 to 12 percent

Particle-size control section:
*Ashy upper part--40 to 55 cm thick; 5 to 8 percent clay; 10 to 30 percent rock fragments
*Loamy-skeletal lower part--45 to 65 cm thick; 5 to 18 percent clay; 40 to 75 percent angular rock fragments

A horizon
Moist color--7.5YR 3/2, 10YR 2/2, 10YR 3/3, 10YR 4/4, 10YR 5/6
Dry color--10YR 4/3, 10YR 5/2, 10YR 5/3, 10YR 5/4, 10YR 6/4, 10YR 7/4
Fine-earth texture--ashy silt loam
Clay content--5 to 8 percent
Sand content--20 to 40 percent
Organic matter content--1.0 to 4.5 percent
Total rock fragment content--5 to 35 percent
Gravel content--5 to 30 percent
Cobble content--0 to 5 percent
Stone content--0 to 5 percent
Reaction--5.6 to 7.3
Thickness--5 to 20 cm

Bw horizon
Moist color--7.5YR 3/4, 10YR 4/4, 10YR 4/6, 10YR 5/6
Dry color--7.5YR 5/4, 10YR 5/4, 10YR 6/4, 10YR 6/6, 10YR 7/4, 10YR 7/6
Fine-earth texture--ashy silt loam
Clay content--4 to 10 percent
Sand content--10 to 40 percent
Organic matter content--0.5 to 2.5 percent
Total rock fragment content--15 to 30 percent
Gravel content--10 to 30 percent
Cobble content--0 to 5 percent
Stone content--0 to 5 percent
Reaction--5.6 to 7.3
Thickness--20 to 50 cm

EBb horizon
Moist color--10YR 4/6, 10YR 5/3, 10YR 5/4, 10YR 5/6, 10YR 6/4, 2.5Y 4/4
Dry color--10YR 6/3, 10YR 7/3, 10YR 7/4
Fine-earth texture--silt loam, loam, sandy loam
Clay content--5 to 17 percent
Sand content--25 to 65 percent
Organic matter content--0.5 to 2.0 percent
Total rock fragment content--35 to 55 percent
Gravel content--20 to 45 percent
Cobble content--0 to 10 percent
Stone content--0 to 5 percent
Reaction--5.6 to 6.1
Thickness--10 to 40 cm

2Bwb horizon
Moist color--10YR 5/4, 10YR 5/6, 10YR 6/6, 2.5Y 4/4, 2.5Y 5/2
Dry color--10YR 6/4, 10YR 7/3, 10YR 7/4, 2.5Y 6/4, 2.5Y 7/2
Fine-earth texture--loam, sandy loam
Clay content--5 to 20 percent
Sand content--25 to 75 percent
Organic matter content--0.5 to 2.0 percent
Total rock fragment content--45 to 70 percent
Gravel content--25 to 65 percent
Cobble content--0 to 15 percent
Stone content--0 to 5 percent
Reaction--5.6 to 7.3
Thickness--13 to 75 cm

2BCb horizon
Moist color--10YR 6/6, 2.5Y 5/4
Dry color--10YR 7/6, 10YR 8/4, 2.5Y 7/4
Fine-earth texture--loam, sandy loam
Clay content--5 to 15 percent
Sand content--25 to 60 percent
Organic matter content--0.3 to 1.5 percent
Total rock fragment content--65 to 80 percent
Gravel content--35 to 80 percent
Cobble content--0 to 20 percent
Stone content--0 to 10 percent
Reaction--5.6 to 6.1
Thickness--13 to 40 cm

COMPETING SERIES:
Bouldercreek--very deep (more than 150 cm); 15 to 65 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; 0 to 25 percent subangular rock fragments in Bw horizon; 2BC and 2C horizons below ash mantle that contain mica flakes; formed in volcanic ash and loess over colluvium derived from schist, gneiss, granitic rock, or quartzite
Boulderjud--deep (100 to 150 cm) to paralithic contact (granite); 30 to 65 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; 2Bt horizon below ash mantle; formed in coarse-silty volcanic ash over colluvium and residuum derived from granitic rock
Bulgar--very deep (more than 150 cm); 60 to 90 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; ash mantle that has more than 5 percent rounded rock fragments; 2EBb, 2Ab, 2AEb, or 2Eb horizon below ash mantle; loamy-skeletal throughout series control section (to a depth of 200 cm); rounded glacial rock fragments in lower part of particle-size control section; formed in volcanic ash over dominantly granitic till
Bullroar--very deep (more than 150 cm); 60 to 90 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; ash mantle that has less than 5 percent rounded rock fragments; loam, sandy loam, or loamy sand 2BC horizon (loamy-skeletal); 2EBb, 2ACb, or 2Eb horizon below ash mantle; coarse sand and gravel in lower part of series control section (150 to 200 cm); rounded alluvial fragments in lower part of particle-size control section; formed in volcanic ash over mixed alluvium
Deardorf--moderately deep (50 to 100 cm) to lithic contact (andesitic basalt); 60 to 90 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; 12 to 17 percent clay in loamy-skeletal part of particle-size control section; formed in volcanic ash over colluvium and residuum derived from andesitic basalt
Ferguson--very deep (more than 150 cm); ash texture of very fine sandy loam; 30 to 55 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; 2Bw horizon; 100 to 150 cm deep to loamy coarse sand or sand 2C horizon (sandy-skeletal); formed in volcanic ash over dominantly granitic glaciofluvial deposits
Honeyjones, Huckle, Thorton--no lithic contact within a depth of 150 cm
Stalter--moderately deep (50 to 100 cm) to paralithic contact (granite); 60 to 90 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; formed in volcanic ash over colluvium and residuum derived from granite
Threecent--moderately deep (50 to 100 cm) to lithic contact (metasedimentary rock); 60 to 90 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; 4 to 12 percent clay in loamy-skeletal part of particle-size control section; formed in volcanic ash over colluvium and residuum derived from metasedimentary rock
Twobit--moderately deep (50 to 100 cm) to lithic contact (metavolcanic rock); 60 to 90 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; 18 to 27 percent clay in loamy-skeletal part of particle-size control section; formed in volcanic ash over colluvium and residuum derived from metavolcanic rock

Similar soils with mixed mineralogy
Bonnash--very deep (more than 150 cm); 5 to 30 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; 2E/Bw horizon; 65 to 115 cm deep to loamy coarse sand 2C horizon (sandy-skeletal); formed in volcanic ash over mixed alluvium or glaciofluvial deposits
Dewberry--very deep (more than 150 cm); 12 to 20 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; sandy loam 2C horizon (loamy-skeletal); no 2EBb, 2ACb, or 2Eb horizon below ash mantle; formed in volcanic ash over mixed alluvium
Stevie--very deep (more than 150 cm); 12 to 20 percent glass in 0.02- to 2.0-mm fraction of ashy part of particle-size control section; 15 to 30 percent rock fragments in Bw horizon; 2E/Bw horizon below ash mantle; excessively drained; formed in volcanic ash over colluvium

GEOGRAPHIC SETTING:
Elevation--1300 to 1770 m
Climate--cold, wet winters; warm, dry summers
Mean annual precipitation--520 to 940 mm
Mean annual air temperature--2 to 6 degrees C
Frost-free period--25 to 70 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Analulu--on backslopes and ridges of mountains at lower elevations; 50 to 100 cm (moderately deep) to lithic contact; volcanic ash mantle more than 36 cm thick; 60 to 70 dry days
Carbeleek (T)--on backslopes; more than 150 cm (deep) to bedrock; volcanic ash mantle more than 36 cm thick
Kingbolt--on ridges, benches, and shoulders at lower elevations and on more southerly aspects; 50 to 100 cm (moderately deep) to lithic contact; 45 to 60 dry days
Pasturecreek--on planar to convex mid to upper backslopes; more than 150 cm (very deep) to bedrock; volcanic ash more than 36 cm thick
McWillar--on backslopes; 100 to 150 cm (deep) to lithic contact; 45 to 60 dry days; argillic horizon
Threecent--on convex to planar slopes of benches and ridges; 50 to 100 cm (moderately deep) to lithic contact
Wahoogulch (T)--on gently sloping backslopes and convex upper slopes at lower elevations and on southerly aspects; 50 to 100 cm (moderately deep) to lithic contact; volcanic ash mantle more than 36 cm thick; 60 to 75 dry days

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high over high or moderately high

USE AND VEGETATION:
Use--watershed, timber production, wildlife habitat
Native vegetation--grand fir, Douglas-fir, Engelmann spruce, western larch, ponderosa pine, lodgepole pine, subalpine fir, Douglas maple, pinegrass, northern twinflower, big huckleberry, heartleaf arnica, elk sedge, grouse huckleberry, showy aster, woodland strawberry, western fescue, singleleaf pinyon, baldhip rose, western meadow-rue, longstalk clover, prince's pine, Columbia brome, pathfinder, darkwoods violet, largeleaf sandwort, northwestern sedge, starry false Solomon's seal, white hawkweed, common snowberry
Plant association--dominantly ABGR/LIBOL2; may include ABGR/VAME

DISTRIBUTION AND EXTENT: Blue Mountains of northeast Oregon; MLRA 43C; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Wallowa-Whitman National Forest, Oregon; 2018

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Cambic horizon--zones from 23 to 46 cm and 56 to 76 cm
*Depth to lithic contact--117 cm
*Volcanic glass--zone from 5 to 56 cm
*Andic soil properties--zone from 5 to 56 cm
*Particle-size control section--zone from 5 to 105 cm

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National Cooperative Soil Survey
U.S.A.