LOCATION WARFIELD ORTentative Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, frigid Vitrandic Haploxerepts
TYPICAL PEDON: Warfield gravelly ashy sandy loam - forested, on a 50 percent southfacing slope at an elevation of 6,050 feet. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 3 inches; slightly decomposed needles and twigs
A--3 to 6 inches; very dark grayish brown (10YR 3/2) gravelly ashy sandy loam, brown (10YR 4/3) dry; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine and fine, and few medium roots; common fine irregular pores; 15 percent gravel; neutral (pH 7.0); clear smooth boundary. (3 to 9 inches thick)
AB--6 to 10 inches; dark brown (10YR 3/3) gravelly ashy sandy loam, brown (10YR 5/3) dry; weak medium and fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; many fine, common medium and few coarse roots; few fine tubular pores; 15 percent gravel; slightly acid (pH 6.5); clear wavy boundary. (4 to 10 inches thick)
2Bw--10 to 34 inches; brown (10YR 4/3) extremely stony sandy loam, light yellowish brown (10YR 6/4) dry; weak medium and fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine, many medium and common coarse roots; few fine tubular pores; 15 percent gravel, 15 percent cobbles and 35 percent stones; slightly acid (pH 6.5); clear wavy boundary. (9 to 24 inches thick)
3C--34 to 48 inches; pale brown (10YR 6/3) extremely gravelly loamy sand, light gray (10YR 7/2) dry; single grain; loose, nonsticky and nonplastic; 75 percent gravel and 10 percent cobbles; strongly acid (pH 5.5); abrupt wavy boundary (10 to 16 inches thick)
4R--48 inches; hard, granite bedrock
TYPE LOCATION: Baker County, Oregon
Section 19 (SE 1/4, SW 1/4, NE 1/4), T.6 S., R. 44 E.
Latitude: 45 degrees, 01 minutes, 49 seconds North
Longitude: 117 degrees, 18 minutes, 49 seconds West
UTM coordinates: zone 11; northing: 4,986,144.5; easting: 475,294.9; NAD27
USGS Quadrangle: Krag Peak
RANGE IN CHARACTERISTICS:
Soil Temperature: frigid regime
Mean Annual Soil Temperature: 38 to 45 degrees F
Mean Summer Soil Temperature: 47 to 54 degrees F
Mean Winter Soil Temperature: 32 to 37 degrees F
Soil Moisture: xeric regime; dry 45 to 60 consecutive days in summer
Particle-size Control Section: 10 to 40 inches below mineral soil surface
clay content, average: 7 to 11 percent
rock fragment content, average: 35 to 75 percent
Diagnostic Horizons and Features:
vitrandic subgroup properties: upper boundary at the mineral surface; 7 to 13 inches thick
Al+1/2Fe (ammonium oxalate): 0.4 to 1.0 percent
P retention: 30 to 50 percent
0.02-2.0 mm fraction: 30 to 40 percent of fine earth
glass content in the 0.02-2.0mm fraction: 30 to 55 percent
cambic horizon: 14 to 34 inches thick
lithic contact, depth below mineral soil surface: 40 to 80 inches
A horizon:
color, moist: 7.5YR 3/4; 10YR 3/2
color, dry: 7.5YR 4/4; 10YR 4/3, 4/4, 5/3
texture: GR-ASHY-SL, GR-ASHY-SIL
clay content: 5 to 12 percent
rock fragment content: 15 to 25 percent
gravel: 10 to 15 percent
cobbles: 0 to 5 percent
stones: 0 to 5 percent
reaction: slightly acid or neutral; pH: 6.1 to 7.3
AB horizon, Bw horizon in some pedons:
color, moist: 7.5YR 3/4; 10YR 3/3, 4/3
color, dry: 7.5YR 4/6; 10YR 5/3, 5/4
texture: GR-ASHY-SL, GRV-ASHY-SL, CBV-ASHY-SL, STV-ASHY-SL
clay content: 5 to 12 percent
rock fragment content: 15 to 55 percent
gravel: 10 to 20 percent
cobbles: 0 to 20 percent
stones: 0 to 15 percent
reaction: moderately acid or slightly acid; pH: 5.6 to 6.5
2Bwb horizon; includes 2EBb horizons in some pedons:
color, moist: 7.5YR 3/4, 4/4, 5/4; 10YR 4/4, 5/3
color, dry: 7.5YR 4/6, 5/6; 10YR 5/4, 6/3, 6/4
texture: STX-SL, STV-SL
clay content: 5 to 12 percent
rock fragment content: 50 to 80 percent
gravel: 15 to 25 percent
cobbles: 15 to 25 percent
stones: 20 to 35 percent
reaction: moderately acid or slightly acid; pH: 5.6 to 6.5
3C horizon; 3BC horizons in some pedons:
color, moist: 7.5YR 5/3, 6/3; 10YR 5/3, 6/3
color, dry: 7.5YR 7/2, 7/3; 10YR 7/2, 7/3, 8/3
texture: STX-SL, GRX-LS, GRX-S
clay content: 2 to 7 percent
rock fragment content: 70 to 90 percent
gravel: 20 to 80 percent
cobbles: 5 to 20 percent
stones: 0 to 40 percent
reaction: strongly acid or moderately acid; pH: 5.1 to 6.0
COMPETING SERIES:
Analulu - moderately deep (20 to 40 inches) to a lithic contact (argillite); minor volcanic ash influence in upper 7 to 14 inches has 5 to 20 percent glass; particle-size control section averages 8 to 15 percent clay
Ardenvoir - moderately deep (20 to 40 inches) to a paralithic contact (metasedimentary siltstone or quartzite); dry 45 to 75 consecutive days in summer
Blinn - moderately deep (20 to 40 inches) to a lithic contact (basalt); minor influence of volcanic ash in upper 7 to 14 inches with 5 to 20 percent glass; particle-size control section averages 18 to 27 percent clay
Brevco - moderately deep (20 to 40 inches) to a lithic contact (granite); minor volcanic ash influence in upper 7 to 14 inches has 5 to 20 percent glass; particle-size control section averages less than 18 percent clay; dry 60 to 75 consecutive days in summer
Coxit - very deep in colluvium and residuum from metasedimentary lithology; particle-size control section averages 8 to 18 percent clay; dry 60 to 75 consecutive days in summer
Easte - deep (40 to 60 inches) to a paralithic contact (weathered andesite or basalt); umbric epipedon 40 to 60 inches thick; particle-size control section is 10 to 18 percent clay; dry greater than 90 consecutive days in summer
Highhorn - deep (40 to 60 inches) to a lithic contact (argillite); ash mantle 7 to 14 inches thick over buried Bwb horizons; particle-size control section averages 27 to 35 percent clay; dry for 45 to 75 consecutive days in summer
Huntrock - moderately deep (20 to 40 inches) to a lithic contact (argillite); particle-size control section soils averages 27 to 35 percent clay; dry 50 to 75 consecutive days in summer
Jimbluff - very deep in alluvium and till; particle-size control section averages 2 to 6 percent clay; dry 60 to 75 consecutive days in summer
Jumpe - very deep in colluvium from basalt; particle-size control section averages 15 to 27 percent clay dry 60 to 75 consecutive days in summer
Kamela - moderately deep (20 to 40 inches) to a lithic contact (basalt); volcanic ash mixed in colluvium 7 to 14 inches thick with 20 to 40 percent volcanic glass; particle-size control section averages 18 to 27 percent clay
Lekrem - deep and very deep (40 to greater than 80 inches) to a lithic contact (granite); formed in colluvium and glacial till from granitic rock; particle-size control section averages 3 to 8 percent clay; dry 60 to 75 consecutive days in summer
Lemoncreek - moderately deep (20 to 40 inches) to lithic contact (metavolcanic); buried 2Eb and 2Bwb horizons; particle-size control section averages 18 to 25 percent clay
Longort - moderately deep (20 to 40 inches) to a densic contact (till)
Noil - moderately deep (20 to 40 inches) to a paralithic contact (schist); 2 to 4 percent mica flakes throughout
Ontrail - very deep in colluvium and till; dry 60 to 75 consecutive days in summer
Radercreek - deep (40 to 60 inches) to a lithic contact (sandstone); minor influence of volcanic ash in upper 7 to 24 inches has 5 to 20 percent glass; particle-size control section is less than 18 percent clay; dry for 60 to 75 consecutive days in summer
Redpeak - moderately deep (20 to 40 inches) to a lithic contact (sandstone); particle-size control section averages 10 to 20 percent clay; soils have hues of 5YR and 2.5YR; dry 60 to 75 consecutive days in summer
Santop - moderately deep (20 to 40 inches) to a lithic contact (sandstone); minor volcanic ash influence in upper 7 to 14 inches has 5 to 20 percent glass; particle-size control section averages 5 to 15 percent clay; dry for 60 to 75 consecutive days in summer;
Seeburg - very deep in tuffaceous sandstone colluvium; particle-size control section averages 4 to 7 percent clay; dry 60 to 75 consecutive days in summer
Thout - moderately deep (20 to 40 inches) to a lithic contact (andesite); minor volcanic ash influence in upper 7 to 14 inches has 5 to 20 percent glass; particle-size control section averages 4 to 14 percent clay; dry 60 to 75 consecutive days in summer
Threecabin - deep (40 to 60 inches) to a lithic contact (basalt); volcanic ash mixed in colluvium in upper 24 to 44 inches has 15 to 30 percent glass; particle-size control section averages 11 to 17 percent clay
GEOGRAPHIC SETTING:
Landform: moraines in glaciated mountains
Slope gradient: 15 to 90 percent
Parent material: volcanic ash (mixed mantle) over colluvium over till
Lithology: granitic rock
Elevation: 4,000 to 6,200 feet
Climate: cold, wet winters and cool, dry summers
Mean annual precipitation: 20 to 45 inches
Mean annual air temperature: 36 to 43 degrees F
Frostfree period: 25 to 80 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Endcreek: on gently sloping benches and toeslopes; moderately deep, thick ash mantle over buried loamy-skeletal colluvium; under grand fir, Douglas-fir, grouse wortleberry and pinegrass
Powderriver: on convex upper backslopes and shoulders; shallow, loamy-skeletal soil under open canopy of Douglas-fir or grand fir with pinegrass, Rocky Mountain maple and elk sedge
DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: moderately rapid
USE AND VEGETATION:
Use: timber production, livestock grazing, recreation, watershed and wildlife habitat
Native vegetation: grand fir, lodgepole pine, Douglas-fir, western larch, scoular's willow, Rocky Mountain maple, birchleaf spiraea, shinyleaf ceanothus, Oregon grape holly, white flowered hawkweed, common yarrow, dogbane, bigleaf sandwort, pinegrass, elk sedge and mountain brome
Plant Association: ABGR/ACGL (grand fir/Rocky Mountain maple); may include: ABGR/CARU (grand fir/pinegrass)
DISTRIBUTION AND EXTENT:
Distribution: MLRA: 43c; Blue Mountains in northeastern Oregon
Extent: small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Wallowa-Whitman National Forest, Oregon; 2008. The name is from a creek in the Elkhorn Mountains.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
ochric epipedon: 3 to 10 inches; A and AB horizons
cambic horizon: 10 to 34 inches; 2Bw horizon
vitrandic subgroup feature (mixed ash mantle): 3 to 10 inches; A and AB horizons
particle-size control section: 13 to 43 inches; 2Bw and 3C horizons