LOCATION LACKEYSHOLE ORTentative Series
TAXONOMIC CLASS: Ashy over loamy-skeletal, amorphic over isotic Typic Vitricryands
TYPICAL PEDON: Lackeyshole ashy silt loam - woodland, on a 5 percent east-facing slope at elevation of 6,080 feet. (Colors are for moist soil unless otherwise noted. All textures are apparent field textures.)
Oi--0 to 0.5 inches; needles and twigs.
A--0.5 to 5 inches; dark brown (10YR 3/3) ashy silt loam, light yellowish brown (10YR 6/4) dry; weak fine and very fine subangular blocky structure; soft, very friable, nonsticky, nonplastic and weakly smeary; common fine and very fine and few medium roots; common fine irregular pores; 5 percent gravel; slightly acid (pH 6.5); clear wavy boundary. (1 to 8 inches thick)
Bw--5 to 15 inches; dark yellowish brown (10YR 4/4) ashy silt loam, light yellowish brown (10YR 6/4) dry; weak fine and very fine subangular blocky structure; loose, very friable, nonsticky, nonplastic and weakly smeary; common fine, medium, and coarse roots; few fine tubular pores; 10 percent gravel; slightly acid (pH 6.5); clear wavy boundary. (10 to 26 inches thick)
2Eb--15 to 30 inches; brown (10YR 4/3) very gravelly loam, pale brown (10YR 6/3) dry; weak fine and very fine subangular blocky structure; soft, friable, slightly sticky and slightly plastic; many fine, common medium, and few coarse roots; common fine and few medium tubular pores; 40 percent gravel; neutral (pH 7.0); gradual smooth boundary. (3 to 20 inches thick)
2Bwb--30 to 42 inches; brown (10YR 4/3) very gravelly loam, brown (10YR 5/3) dry; weak very fine subangular blocky structure; soft, friable, slightly sticky and slightly plastic; common fine and medium and few coarse roots; few fine and medium tubular pores; 50 percent gravel; neutral (pH 7.0); clear smooth boundary. (6 to 19 inches thick)
2BCb--42 to 45 inches; brown (10YR 4/3) extremely gravelly loam, brown (10YR 5/3) dry; weak very fine subangular blocky structure; soft, friable, slightly sticky and slightly plastic; few fine roots; 55 percent gravel and 15 percent cobbles; neutral (pH 7.0); abrupt irregular boundary. (3 to 23 inches thick)
2R--45 inches; andesitic basalt bedrock.
TYPE LOCATION: Baker County, Oregon
Section 1 (NE 1/4, NW 1/4, SW 1/4), T. 13 S., R. 35.5 E.
Latitude: 44 degrees, 27 minutes, 57 seconds N.
Longitude: 118 degrees, 22 minutes, 04 seconds W.
USGS Quadrangle: Rail Gulch
RANGE IN CHARACTERISTICS:
Soil Temperature: cryic regime
Mean Annual Soil Temperature: 36 to 41 degrees F
Mean Summer Soil Temperature: 42 to 49 degrees F
Mean Winter Soil Temperature: 32 to 36 degrees F
Soil Moisture: udic regime, dry 30 to 45 days in summer
Particle-size Control Section: mineral surface to 40 inches below the mineral surface
Upper Part: (ashy): 14 to 34 inches thick
Clay Content: 4 to 7 percent
Rock fragment content: 5 to 25 percent
Lower Part: (loamy-skeletal): 6 to 26 inches thick
Clay content: 5 to 15 percent
Sand content: less than 25 percent very coarse, coarse and medium sand
Rock fragment content: 35 to 50 percent
Rock fragment shape: subangular
Diagnostic Horizon and Features:
andic soil material: upper boundary at the mineral soil surface; 14 to 34 inches thick
Al+1/2Fe(aox): 1.5 to 3.0 percent
bulk density: 0.65 to 1.00 g/cc
P retention: 60 to 90 percent
0.02-2.0 mm fraction: 40 to 60 percent of fine earth
glass content of the 0.02-2.0 mm fraction: 60 to 90 percent
water content at 1500 kPa tension (air dried soil): 5 to 12 percent
8Si + 2Fe(aox): 5 to 12 percent
8Si - 2Fe(aox): 4 to 8 percent
ochric epipedon: 1 to 8 inches thick
cambic horizon: upper: 10 to 26 inches
lower: 6 to 19 inches
lithic contact depth: 40 to 60 inches
Major Horizons:
A horizon
color, moist: 10YR 3/2, 3/3
color, dry: 10YR 4/2, 5/2, 5/3, 6/4
texture: ASHY-SIL
clay content: 4 to 7 percent
rock fragment content: 5 to 15 percent
gravel: 5 to 15 percent
reaction: moderately acid to slightly acid; pH: 5.6 to 6.5
base saturation (sum of bases): 25 to 50 percent
organic matter: 2 to 10 percent
Bw horizon
color, moist: 10YR 3/2, 4/3, 4/4, 5/4, 5/6
color dry: 10YR 5/3, 5/4, 6/3, 6/4, 8/4
texture: ASHY-SIL, CB-ASHY-SIL, GR-ASHY-SIL
clay content: 4 to 7 percent
rock fragment content: 10 to 25 percent
gravel: 5 to 15 percent
cobbles: 0 to 10 percent
stones: 0 to 5 percent
reaction: moderately acid to neutral; pH: 5.6 to 7.3
base saturation (sum of bases): 15 to 35 percent
organic matter: 1 to 3 percent
2Eb horizon: (2ABb in some pedons)
color, moist: 10YR 4/3, 5/3
color dry: 10YR 5/3, 6/3, 6/4
texture: GRV-SL, STV-SL, GRV-L, STV-SL
clay content: 6 to 12 percent
rock fragment content: 35 to 40 percent
gravel: 20 to 40 percent
cobbles: 0 to 10 percent
stones: 0 to 10 percent
reaction: moderately acid to neutral; pH: 5.6 to 7.3
base saturation (sum of bases): 60 to 80 percent
2Bwb horizon
color, moist: 7.5YR 4/4; 10YR 4/3, 5/3
color dry: 7.5YR 5/4; 10YR 5/3, 6/3, 6/4
texture: GRV-SL, GRV-L, CBV-L, STV-L
clay content: 5 to 15 percent
rock fragment content: 35 to 50 percent
gravel: 20 to 50 percent
cobbles: 0 to 10 percent
stones: 0 to 10 percent
reaction: slightly acid to neutral: pH: 6.1 to 7.3
base saturation (sum of bases): 70 to 90 percent
2BCb horizon
color, moist: 5YR 5/3; 7.5YR 4/4, 4/6; 10YR 4/3
color, dry: 5YR 5/4; 7.5YR 5/4; 10YR 5/3, 6/3, 6/4
texture: CBV-L, GRV-L, GRX-L, GRV-SL , GRX-SL
clay content: 5 to 17 percent
rock fragment content: 35 to 70 percent
gravel: 20 to 55 percent
cobbles: 5 to 15 percent
stones: 0 to 5 percent
reaction: slightly acid to neutral; pH: 6.1 to 7.3
base saturation (sum of bases): 70 to 90 percent
COMPETING SERIES:
Lackeyshole (T)-deep (40 to 60 inches) to a lithic contact, loamy-skeletal part of pscs is slightly acid or neutral and has 35 to 55 percent subangular rock fragments and less than 25 percent very coarse, coarse and medium sand, formed in volcanic ash over colluvium from andesitic basalt and basalt
Angelpeak-deep (40 to 60 inches) to a lithic contact, loamy-skeletal part of pscs is slightly acid or neutral and has 60 to 85 percent angular rock fragments, formed in volcanic ash over colluvium from argillite
Ashnola (T)-moderately deep and deep (35 to 50 inches) to a densic contact, very deep (>60 inches) to bedrock, ashy part of the pscs is gravelly ashy sandy loam and less than 50 percent silt, formed in volcanic ash over till from sedimentary and volcanic rocks
Bucketlake-very deep (>60 inches), loamy-skeletal part of the pscs has subrounded and rounded rock fragments and clay content of 5 to 15 percent, formed in volcanic ash over till from granite
Ducklake (T)-deep (40 to 60 inches) to a densic contact, very deep (>60 inches) to bedrock, ashy part of the pscs is stony ashy silt loam with more than 50 percent silt, loamy-skeletal part of pscs has rounded or well rounded rock fragments, formed in volcanic ash over till from granite
McCalpinemeadow (T)-moderately deep (20 to 40 inches) to a lithic contact; loamy-skeletal part of the pscs has subangular rock fragments, more than 25 percent very coarse, coarse and medium sand, and clay content of 5 to 10 percent; formed in volcanic ash over colluvium from granite and granodiorite
Mountemily-very deep (>60 inches), loamy-skeletal part of the pscs has subangular and angular rock fragments and clay content of 18 to 30 percent, formed in volcanic ash over colluvium from basalt
Mudlakebasin (T)-moderately deep (20 to 40 inches) to a lithic contact, loamy-skeletal part of the pscs has well rounded and rounded rock fragments, and clay content of 4 to 18 percent, formed in volcanic ash over till from granite
Towermountain (T)-moderately deep (20 to 40 inches) to a paralithic contact, formed in volcanic ash over colluvium from rhyolitic tuff
Troutmeadows -moderately deep (20 to 40 inches) to a lithic contact, loamy-skeletal part of the pscs has subangular rock fragments, less than 25 percent very coarse, coarse and medium sand, and clay content of 10 to 18 percent, formed in volcanic ash over colluvium from basalt
Ufish (T)-deep (40 to 60 inches) to a lithic contact, loamy-skeletal part of pscs is strongly acid to slightly acid, and has 35 to 60 percent subrounded or subangular rock fragments and more than 25 percent very coarse, coarse and medium sand, formed in volcanic ash over colluvium from granite and granodiorite
GEOGRAPHIC SETTING:
Landform: side slopes of mountains
Slope gradient: 0 to 60 percent
Parent material: volcanic ash overlying colluvium and residuum from andesitic basalt or basalt
Lithology: andesitic basalt or basalt
Elevation: 5,200 to 7,000 feet
Climate: cold, wet winters and cool, moist summers
Mean annual precipitation: 25 to 45 inches
Mean annual air temperature: 34 to 39 degrees F.
Frost-free period: 20 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS:
McNamee (T)-occur on steeper more convex slopes; ash mantle less than 14 inches thick
Monument (T)-occur on steeper more convex slopes; ash mantle less than 14 inches thick
Troutmeadow-occur on more convex to planar positions and gentler slopes; moderately deep (20 to 40 inches) to lithic contact
DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: moderate
USE AND VEGETATION:
Use: watershed, wildlife habitat, timber production, livestock grazing and recreation
Native vegetation: subalpine fir, lodgepole pine, grand fir, western larch, grouse whortleberry, bearberry, Oregon boxwood, big huckleberry, hearleaf arnica, blueleaf strawberry, common pearly everlasting, lupine, common yarrow, fireweed, pinegrass, northwestern sedge and elk sedge
Ecological site: PICO(ABLA)/VASC/POPU3; ABLA/VASC/POPU3 may be present
DISTRIBUTION AND EXTENT:
MLRA- E43
Distribution- Blue Mountains of northeastern Oregon
Extent- small
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Baker County, Oregon 2003. The name is from a mountain in the Bullrun Rock Quad.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
ochric epipedon: 0.5 to 5 inches A
cambic horizon: 5 to 15 inches Bw
30 to 42 inches 2Bwb
andic soil properties 0.5 to 15 inches A, Bw
particle-size control section: 0.5 to 40.5 inches A, Bw, 2Eb, 2Bwb
ashy part 0.5 to 15 inches A, Bw
loamy-skeletal part 15 to 40.5 inches 2Eb, 2Bwb
lithic contact 45 inches 2R