LOCATION MCCALPINEMEADOW ORTentative Series
TAXONOMIC CLASS: Ashy over loamy-skeletal, amorphic over isotic Typic Vitricryands
TYPICAL PEDON: McCalpinemeadow ashy silt loam - woodland, on a 42 percent north-facing slope at an elevation of 5,600 feet. (Colors are for moist soil unless otherwise noted. Andic soil materials are apparent field textures.)
Oi--0 to 1 inches; needles, twigs, logs, mosses; trace of boulders and stones
Oe--1 to 2 inches; decomposing needles; trace of boulders and stones
A--2 to 7 inches; dark brown (7.5YR 3/4) ashy silt loam, brown (7.5YR 5/4) dry; weak fine subangular blocky structure; soft, very friable, nonsticky, nonplastic and 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. (2 to 9 inches thick)
Bw--7 to 16 inches; brown (7.5YR 4/4) ashy silt loam, pink (7.5YR 7/4) dry; weak fine and medium subangular blocky structure; soft, very friable, nonsticky, nonplastic and weakly smeary; few very fine and fine and common medium roots; common very fine irregular and very fine tubular pores; slightly acid (pH 6.5); abrupt wavy boundary. (9 to 16 inches thick)
2AEb--16 to 24 inches; dark brown (7.5YR 3/4) extremely cobbly sandy loam, brown (7.5YR 5/4) dry; weak medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; few very fine, fine, and medium roots throughout; common very fine tubular and few very fine irregular pores; 10 percent gravel, 40 percent cobbles and 15 percent stones; moderately acid (pH 5.6); clear irregular boundary. (5 to 9 inches thick)
2Bwb--24 to 33 inches; dark brown (7.5YR 3/4) extremely stony sandy loam, brown (7.5YR 5/4) dry; 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. (9 to 14 inches thick)
2R--33 inches; granite bedrock.
TYPE LOCATION: Grant County, Oregon,
Section 3 (NW1/4, NW1/4, NW1/4), T. 10 S., R. 33 E.
UTM- zone 11; 4954680 northing, 362490 easting
Latitude- 44 degrees, 43 minutes, 56 seconds
Longitude- 118 degrees, 44 minutes, 11 seconds
USGS Quadrangle- Boulder Butte
RANGE IN CHARACTERISTICS:
Soil Temperature: cryic regime
Mean Annual Soil Temperature: 37 to 40 degrees F
Mean Summer Soil Temperature: 44 to 48 degrees F
Mean Winter Soil Temperature: 32 to 36 degrees F
Soil Moisture: udic regime, dry 30 to 40 days in summer
Particle-size Control Section: mineral surface to a lithic contact
Upper part (ashy): 14 to 18 inches thick
Clay content: 0 to 5 percent
Rock fragment content: 0 to 5 percent
Lower part (loamy-skeletal): 11 to 17 inches thick
Clay content: 5 to 10 percent
Sand content: more than 25 percent very coarse, coarse and medium sand
Rock fragment content: 40 to 75 percent
Rock fragment shape: subangular
Diagnostic Horizon Features:
andic soil material: upper boundary at the mineral soil surface, 14 to 18 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 in 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: 2 to 9 inches thick
cambic horizon: upper: 9 to 16 inches thick
lower: 9 to 14 inches thick
lithic contact depth: 25 to 35 inches
Major Horizons:
A horizon
color, moist: 7.5YR 3/2, 3/3, 3/4
color, dry: 7.5YR 5/2, 5/4, 6/4
texture: ASHY-SIL
clay content: 5 to 10 percent
rock fragment content: 0 to 5 percent
gravel: 0 to 5 percent
reaction: moderately acid to slightly acid; pH: 5.6 to 6.5
base saturation (sum of bases): 5 to 25 percent
organic matter: 2 to 10 percent
Bw horizon:
color, moist: 7.5YR 4/3, 4/4, 5/6
color, dry: 7.5YR 6/4, 7/4; 10YR 6/4
texture: ASHY-SIL
clay content: 5 percent
rock fragment content: 0 to 5 percent
gravel: 0 to 5 percent
reaction: slightly acid to neutral; pH: 6.1 to 7.3
base saturation (sum of bases): 2 to 10 percent
organic matter: 1 to 3 percent
2AEb horizon: (2Eb in some pedons)
color, moist: 7.5YR 3/4, 4/4; 10YR 3/3, 4/3, 4/4
color, dry: 5YR 6/3; 7.5YR 5/4; 10YR 5/3, 6/4
texture: CBX-SL, GRV-SL, STV-SL, CBV-SL
clay content: 5 to 10 percent
rock fragment content: 40 to 70 percent
gravel: 10 to 40 percent
cobbles: 5 to 40 percent
stones: 0 to 20 percent
reaction: moderately acid to neutral; pH: 5.6 to 7.3
base saturation (sum of bases): 40 to 60 percent
2Bwb horizon: (2BCb in some pedons)
color, moist: 7.5YR 3/4, 4/6; 10YR 4/3, 4/4, 5/3
color, dry: 7.5YR 5/4, 6/4; 10YR 5/4, 7/4
texture: STX-SL, GRV-SL, STX-LS, CBV-SL
clay content: 0 to 10 percent
rock fragment content: 45 to 80 percent
gravel: 10 to 40 percent
cobbles: 10 to 40 percent
stones: 0 to 50 percent
reaction: moderately acid to neutral: pH: 5.6 to 7.3
base saturation (sum of bases): 40 to 60 percent
COMPETING SERIES:
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
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
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
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: depositional, mountain backslopes of pluvially dissected granitic igneous intrusive mountains
Slope gradient: 20 to 45 percent
Parent material: volcanic ash over colluvium and residuum from granite or granodiorite
Lithology: granite or granodiorite
Elevation: 5,600 to 6,500 feet
Climate: cold, wet winters; warm, dry summers
Mean annual precipitation: 30 to 45 inches
Mean annual air temperature: 35 to 38 degrees F.
Frost free period: 25 to 65 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Ufish (T)--occur on concave to planar, mid to lower slope positions where the lithic contact is at 40 to 60 inches
DRAINAGE AND PERMEABILITY:
Drainage- well drained
Permeability- moderately rapid
USE AND VEGETATION:
Use- Timber production, livestock grazing, recreation, wildlife, watershed
Native vegetation- Subalpine fir, Engleman spruce, Grand fir, lodgepole pine, western larch, long tube twinflower, big huckleberry, grouse whortleberry, Prince's pine, side flowered wintergreen, pink wintergreen and pinegrass
Ecological site- ABLA/LIBOL2 but may include ABLA/VAME or PICO (ABLA)/VAME
DISTRIBUTION AND EXTENT:
MLRA- E43
Distribution- South Central Blue Mountains in Middle Fork and North Forks of John Day River.
Extent- Moderate
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Grant County, Oregon 2003. McCalpinemeadow is the name of a meadow in the Boulder Butte Quad.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
ochric epipedon 2 to 7 inches A
cambic horizon 7 to 16 inches Bw
24 to 33 inches 2Bwb
andic soil properties 2 to 16 inches A, Bw
particle-size control section: 2 to 33 inches A, Bw, 2Aeb, 2Bwb
ashy part 2 to 16 inches A, Bw
loamy-skeletal part 16 to 33 inches 2AEb, 2Bwb
lithic contact 33 inches 2R