LOCATION MCCALPINEMEADOW OR
Established Series
IRD. AEK/RJO/DAL/KMS
02/2019
MCCALPINEMEADOW SERIES
Landscape--mountains
Landform--mountain slopes
Slope--0 to 60 percent
Parent material--thick mantle of volcanic ash over colluvium and residuum derived from granite or granodiorite
Mean annual precipitation--about 810 mm
Mean annual air temperature--about 3 degrees C
Depth class--moderately deep to lithic contact
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: McCalpinemeadow ashy silt loam in an area of woodland, on a 42-percent, north-facing slope at an elevation of 1707 m
Oi--0 to 3 cm; needles, twigs, logs, and mosses; trace of boulders and stones
Oe--3 to 5 cm; decomposing needles; trace of boulders and stones
A--5 to 18 cm; ashy silt loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; weakly smeary; common very fine and medium and few fine roots throughout; common very fine irregular pores; slightly acid (pH 6.5); clear wavy boundary
Bw--18 to 41 cm; ashy silt loam, pink (7.5YR 7/4) dry, brown (7.5YR 4/4) moist; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; weakly smeary; few very fine and fine and common medium roots; common very fine irregular and tubular pores; slightly acid (pH 6.5); abrupt wavy boundary
2AEb--41 to 61 cm; extremely cobbly sandy loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; few very fine, fine, and medium roots throughout; common very fine tubular pores and few very fine irregular pores; 10 percent gravel, 40 percent cobbles, and 15 percent stones; moderately acid (pH 5.6); clear irregular boundary
2Bwb--61 to 84 cm; extremely stony sandy loam, brown (7.5YR 5/4) dry, dark brown (7.5YR 3/4) moist; weak medium subangular blocky structure parting to single grain; soft, very friable to loose, nonsticky and nonplastic; few fine and very fine roots throughout; common very fine irregular pores; 10 percent gravel, 30 percent cobbles, and 30 percent stones; moderately acid (pH 6.0); abrupt irregular boundary
2R--84 cm; granite
TYPE LOCATION: Grant County, Oregon, about 17 m west and 190 m south of the northeast corner of section 4, R. 33 E., T. 10 S.; latitude 44.7336702, longitude -118.738003, datum WGS 84 (coordinates and PLSS details estimated from point on hard copy map)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--3 to 4 degrees C
Mean summer soil temperature--7 to 9 degrees C
Mean winter soil temperature--0 to 2 degrees C
Soil moisture--dry 30 to 40 days in summer
Depth to lithic contact--65 to 90 cm
Thickness of ash-influenced layers--35 to 45 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
*Clay content--0 to 5 percent in upper part, 5 to 10 percent in lower part
*Total rock fragment content--0 to 5 percent in upper part, 40 to 75 percent in lower part
*Rock fragment shape--subangular
A horizon
Moist color--7.5YR 3/2, 7.5YR 3/3, 7.5YR 3/4
Dry color--7.5YR 5/2, 7.5YR 5/4, 7.5YR 6/4
Fine-earth texture--ashy silt loam
Clay content--5 to 10 percent
Sand content--22 to 35 percent
Organic matter content--2 to 6 percent
Total rock fragment content--0 to 5 percent
Gravel content--0 to 5 percent
Reaction--6.1 to 7.3
Base saturation (sum of bases)--5 to 25 percent
Thickness--5 to 25 cm
Bw horizon
Moist color--7.5YR 4/3, 7.5YR 4/4, 7.5YR 5/6
Dry color--7.5YR 6/4, 7.5YR 7/4, 10YR 6/4
Fine-earth texture--ashy silt loam
Clay content--5 to 6 percent
Sand content--22 to 30 percent
Organic matter content--1 to 3 percent
Total rock fragment content--0 to 5 percent
Gravel content--0 to 5 percent
Reaction--6.1 to 7.3
Base saturation (sum of bases)--2 to 10 percent
Thickness--23 to 40 cm
2AEb horizon, and 2Eb horizon (where present)
Moist color--7.5YR 3/4, 7.5YR 4/4, 10YR 3/3, 10YR 4/3, 10YR 4/4
Dry color--5YR 6/3, 7.5YR 5/4, 10YR 5/3, 10YR 6/4
Fine-earth texture--sandy loam
Clay content--5 to 10 percent
Sand content--60 to 70 percent
Organic matter content--1.5 to 3.5 percent
Total rock fragment content--40 to 70 percent
Gravel content--10 to 40 percent
Cobble content--5 to 40 percent
Stone content--0 to 20 percent
Reaction--5.6 to 7.3
Base saturation (sum of bases)--40 to 60 percent
Thickness--13 to 25 cm
2Bwb horizon, and 2BCb horizon (where present)
Moist color--7.5YR 3/4, 7.5YR 4/6, 10YR 4/3, 10YR 4/4, 10YR 5/3
Dry color--7.5YR 5/4, 7.5YR 6/4, 10YR 5/4, 10YR 7/4
Fine-earth texture--sandy loam, loamy sand
Clay content--0 to 10 percent
Sand content--65 to 75 percent
Organic matter content--0.5 to 1.5 percent
Total rock fragment content--40 to 70 percent
Gravel content--10 to 40 percent
Cobble content--10 to 40 percent
Stone content--0 to 50 percent
Reaction--5.6 to 7.3
Base saturation (sum of bases)--40 to 60 percent
Thickness--23 to 35 cm
COMPETING SERIES:
Angelpeak--no lithic contact within a depth of 150 cm or more; 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 a densic contact; very deep (more than 150 cm) to bedrock; 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 140 cm) to a densic contact; very deep (more than 150 cm) to bedrock; 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
Lackeyshole--deep (100 to 150 cm) to a lithic contact (andesite, basalt); pH of 6.1 to 7.3, 35 to 55 percent subangular rock fragments, and less 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 andesitic basalt and basalt
Mountemily--very deep (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 a lithic contact (granite); 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 a paralithic contact (rhyolitic tuff); formed in volcanic ash over colluvium derived from rhyolitic tuff
Troutmeadows--moderately deep (50 to 100 cm) to a lithic contact (basalt); 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 a lithic contact (granitic rock); 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--1720 to 2220 m
Climate--cold, wet winters; warm, dry summers
Mean annual precipitation--650 to 950 mm
Mean annual air temperature--2 to 3 4egrees C
Frost free period--25 to 65 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Ufish--on concave to planar, mid to lower slopes; deep (100 to 150 cm) to a lithic contact (granitic rock)
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high
USE AND VEGETATION:
Use--timber production, livestock grazing, recreation, wildlife habitat, watershed
Potential native vegetation--grand fir, Engelmann spruce, western larch, subalpine fir, Douglas-fir, lodgepole pine, ponderosa pine, big huckleberry, grouse huckleberry, northern twinflower, singleleaf pinyon, heartleaf arnica, elk sedge, pinegrass
DISTRIBUTION AND EXTENT: South-central Blue Mountains in Middle and North Forks of John Day River; MLRA 43C; moderate extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Grant County, Oregon; 2018
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Ochric epipedon
*Cambic horizon--zones from 18 to 41 cm and 61 to 84 cm
*Volcanic glass--zone from 5 to 41 cm
*Andic soil properties--zone from 5 to 41 cm
*Particle-size control section--zone from 5 to 84 cm
National Cooperative Soil Survey
U.S.A.