LOCATION LACKEYSHOLE OR
Established Series
IRD. RJO/DAL/KMS
01/2019
LACKEYSHOLE SERIES
Landscape--mountains, plateaus
Landform--mountain slopes, plateaus
Slope--0 to 90 percent
Parent material--thick mantle of volcanic ash over colluvium and residuum derived from andesite or basalt
Mean annual precipitation--about 1090 mm
Mean annual air temperature--about 3 degrees C
Depth class--deep to lithic bedrock
Drainage class--well drained
Soil moisture regime--udic
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Ashy over loamy-skeletal, amorphic over isotic Typic Vitricryands
TYPICAL PEDON: Lackeyshole ashy silt loam in an area of woodland, on a 5-percent, east-facing slope at an elevation of 1850 m (All textures are apparent field textures.)
Oi--0 to 1 cm; needles and twigs
A--1 to 13 cm; ashy silt loam, light yellowish brown (10YR 6/4) dry, dark brown (10YR 3/3) moist; weak fine and very fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; 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
Bw--13 to 38 cm; ashy silt loam, light yellowish brown (10YR 6/4) dry, dark yellowish brown (10YR 4/4) moist; weak fine and very fine subangular blocky structure; loose, very friable, nonsticky and nonplastic; weakly smeary; common fine, medium, and coarse roots; few fine tubular pores; 10 percent gravel; slightly acid (pH 6.5); clear wavy boundary
2Eb--38 to 76 cm; very gravelly loam, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; 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
2Bwb--76 to 107 cm; very gravelly loam, brown (10YR 5/3) dry, brown (10YR 4/3) moist; 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
2BCb--107 to 114 cm; extremely gravelly loam, brown (10YR 5/3) dry, brown (10YR 4/3) moist; 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
2R--114 cm; andesitic basalt
TYPE LOCATION: Baker County, Oregon, about 267 m east and 516 m north of the southwest corner of section 1, T. 13 S., R. 35.5 E.; Rail Gulch U.S. Geological Survey quadrangle; latitude 44.4656661, longitude -118.3690615, datum WGS 84 (coordinates and PLSS details estimated from a point on a hard copy map)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--about 2 to 5 degrees C
Mean summer soil temperature--about 6 to 9 degrees C
Mean winter soil temperature--about 0 to 2 degrees C
Soil moisture--dry 30 to 45 days in summer
Depth to lithic contact--100 to 150 cm
Thickness of ash-influenced layers--35 to 85 cm
Estimated properties of layers influenced by volcanic ash
*Ammonium oxalate extractable Al + 1/2 Fe--1.5 to 3.0 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--60 to 90 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--35 to 85 cm thick; 4 to 7 percent clay; 5 to 25 percent rock fragments
*Loamy-skeletal lower part--15 to 65 cm thick; 5 to 15 percent clay; less than 25 percent very coarse, coarse, and medium sand; 35 to 50 percent subangular rock fragments
A horizon
Moist color--10YR 3/2, 10YR 3/3
Dry color--10YR 4/2, 10YR 5/2, 10YR 5/3, 10YR 6/4
Fine-earth texture--ashy silt loam
Clay content--4 to 7 percent
Sand content--30 to 45 percent
Organic matter content--2 to 5 percent
Total rock fragment content--5 to 15 percent
Gravel content--5 to 15 percent
Reaction--5.6 to 6.5
Thickness--3 to 20 cm
Bw horizon
Moist color--10YR 3/2, 10YR 4/3, 10YR 4/4, 10YR 5/4, 10YR 5/6
Dry color--10YR 5/3, 10YR 5/4, 10YR 6/3, 10YR 6/4, 10YR 8/4
Fine-earth texture--ashy silt loam
Clay content--4 to 7 percent
Sand content--30 to 45 percent
Organic matter content--1 to 3 percent
Total rock fragment content--10 to 25 percent
Gravel content--5 to 15 percent
Cobble content--0 to 10 percent
Stone content--0 to 5 percent
Reaction--5.6 to 7.3
Base saturation (sum of bases)--15 to 35 percent
Thickness--25 to 65 cm
2Eb horizon, and 2ABb horizon (where present)
Moist color--10YR 4/3, 10YR 5/3
Dry color--10YR 5/3, 10YR 6/3, 10YR 6/4
Fine-earth texture--sandy loam, loam
Clay content--6 to 12 percent
Sand content--40 to 70 percent
Organic matter content--0.5 to 2.0 percent
Total rock fragment content--35 to 40 percent
Gravel content--20 to 40 percent
Cobble content--0 to 10 percent
Stone content--0 to 10 percent
Reaction--5.6 to 7.3
Base saturation (sum of bases)--60 to 80 percent
Thickness--8 to 50 cm
2Bwb horizon
Moist color--7.5YR 4/4, 10YR 4/3, 10YR 5/3
Dry color--7.5YR 5/4, 10YR 5/3, 10YR 6/3, 10YR 6/4
Fine-earth texture--sandy loam, loam
Clay content--5 to 15 percent
Sand content--45 to 70 percent
Organic matter content--0.5 to 1.5 percent
Total rock fragment content--35 to 50 percent
Gravel content--20 to 50 percent
Cobble content--0 to 10 percent
Stone content--0 to 10 percent
Reaction--6.1 to 7.3
Base saturation (sum of bases)--70 to 90 percent
Thickness--15 to 50 cm
2BCb horizon
Moist color--5YR 5/3, 7.5YR 4/4, 7.5YR 4/6, 10YR 4/3
Dry color--5YR 5/4, 7.5YR 5/4, 10YR 5/3, 10YR 6/3, 10YR 6/4
Fine-earth texture--sandy loam, loam
Clay content--5 to 17 percent
Sand content--30 to 70 percent
Organic matter content--0.5 to 1.5 percent
Total rock fragment content--35 to 50 percent
Gravel content--20 to 55 percent
Cobble content--5 to 15 percent
Stone content--0 to 5 percent
Reaction--6.1 to 7.3
Base saturation (sum of bases)--70 to 90 percent
Thickness--8 to 60 cm
COMPETING SERIES:
Angelpeak--deep (100 to 150 cm) to lithic contact; pH of 6.1 to 7.3 and 60 to 85 percent angular rock fragments in loamy-skeletal part of particle-size control section; formed in volcanic ash over colluvium derived from argillite
Ashnola--moderately deep or deep (90 to 125 cm) to densic contact; gravelly ashy sandy loam and less than 50 percent silt in ashy part of particle-size control section; formed in volcanic ash over till derived from sedimentary and volcanic rock
Bucketlake--no lithic contact within a depth of more than 150 cm; subrounded and rounded rock fragments and 5 to 15 percent clay in loamy-skeletal part of particle-size control section; formed in volcanic ash over till derived from granite
Ducklake--deep (100 to 150 cm) to densic contact; stony ashy silt loam and more than 50 percent silt in ashy part of particle-size control section; rounded or well rounded rock fragments in loamy-skeletal part of particle-size control section; formed in volcanic ash over till derived from granite
McCalpinemeadow--moderately deep (50 to 100 cm) to lithic contact; subangular rock fragments, more than 25 percent very coarse, coarse, and medium sand, and 5 to 10 percent clay in loamy-skeletal part of particle-size control section; formed in volcanic ash over colluvium derived from granite and granodiorite
Mountemily--no lithic contact within a depth of more than 150 cm; subangular and angular rock fragments and 18 to 30 percent clay in loamy-skeletal part of particle-size control section; formed in volcanic ash over colluvium derived from basalt
Mudlakebasin--moderately deep (50 to 100 cm) to lithic contact; well rounded and rounded rock fragments and 4 to 18 percent clay in loamy-skeletal part of particle-size control section; formed in volcanic ash over till derived from granite
Towermountain--moderately deep (50 to 100 cm) to paralithic contact; formed in volcanic ash over colluvium derived from rhyolitic tuff
Troutmeadows--moderately deep (50 to 100 cm) to lithic contact; subangular rock fragments, less than 25 percent very coarse, coarse, and medium sand, and 10 to 18 percent clay in loamy-skeletal part of particle-size control section; formed in volcanic ash over colluvium derived from basalt
Ufish--deep (100 to 150 cm) to lithic contact; pH of 5.1 to 6.5, 35 to 60 percent subrounded or subangular rock fragments, and more than 25 percent very coarse, coarse, and medium sand in loamy-skeletal part of particle-size control section; formed in volcanic ash over colluvium derived from granite and granodiorite
GEOGRAPHIC SETTING:
Elevation--1690 to 2380 m
Climate--cold, wet winters; cool, moist summers
Mean annual precipitation--670 to 1610 mm
Mean annual air temperature--0 to 6 degrees C
Frost-free period--20 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS:
McNamee, Monument--on steeper, more convex slopes; ash mantle less than 35 cm thick
Troutmeadow--in more convex to planar positions and on gentler slopes; moderately deep (50 to 100 cm) to lithic contact
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--moderately high
USE AND VEGETATION:
Use--watershed, wildlife habitat, timber production, livestock grazing, recreation
Native vegetation--subalpine fir, lodgepole pine, Engelmann spruce, grand fir, western larch, Douglas-fir, grouse huckleberry, big huckleberry, mountain big sagebrush, elk sedge, heartleaf arnica, darkwoods violet, pinegrass, sidebells wintergreen, prince's pine, Ross' sedge, western needlegrass, Utah honeysuckle, sweetcicely, lupine, western meadow-rue, sickletop lousewort, skunkleaf polemonium, Sitka valerian, birchleaf spirea
Plant association--dominantly PICO(ABLA)/VASC/POPU3; may include ABLA/VASC/POPU3
DISTRIBUTION AND EXTENT: Blue Mountains of northeastern Oregon; MLRA 10; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Baker County, Oregon; 2018
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Upper cambic horizon--zone from 13 to 38 cm
*Lower cambic horizon--zone from 76 to 107 cm
*Andic soil properties--zone from 1 to 38 cm
*Volcanic glass--zone from 1 to 38 cm
*Particle-size control section--zone from 1 to 103 cm; ashy part includes zone from 1 to 38 cm; loamy-skeletal part includes zone from 38 to 103 cm
National Cooperative Soil Survey
U.S.A.