LOCATION POGUEPOINT ORTentative Series
TAXONOMIC CLASS: Ashy over loamy-skeletal, amorphic over isotic, frigid Typic Vitrixerands
TYPICAL PEDON: Poguepoint ashy silt loam woodland, on a 25 percent east-facing slope at an elevation of 5,600 feet. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 3 inches; needles and twigs.
A--3 to 6 inches; brown (10YR 5/3) ashy silt loam, very pale brown (10YR 7/3) dry; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many fine and few medium and coarse roots; common fine irregular pores; neutral (pH 7.0); clear smooth boundary. (1 to 12 inches thick)
Bw--6 to 19 inches; yellowish brown (10YR 5/4) ashy silt loam, very pale brown (10YR 7/4) dry; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine, medium, and coarse roots; few fine tubular pores; 5 percent gravel; neutral (pH 7.0); abrupt smooth boundary. (10 to 20 inches thick)
2BEb--19 to 27 inches; brown (10YR 4/3) gravelly loam, yellowish brown (10YR 5/4) dry; weak fine and medium subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few fine,and common medium and coarse roots; few fine tubular pores; 25 percent gravel and 5 percent cobbles; neutral (pH 7.0); gradual smooth boundary. (8 to 31 inches thick)
2Bwb1--27 to 40 inches; brown (10YR 4/3) very gravelly loam, yellowish brown (10YR 5/4) dry; weak fine and medium subangular blocky structure parting to very fine subangular; slightly hard, friable, moderately sticky and moderately plastic; few fine and coarse, and common medium roots; few fine tubular pores; 30 percent gravel and 10 percent cobbles; neutral (pH 7.0); gradual smooth boundary. (6 to 13 inches thick)
2Bwb2--40 to 53 inches; brown (10YR 4/3) very gravelly loam, yellowish brown (10YR 5/4) dry; weak fine and very fine subangular blocky structure; slightly hard, friable, slightly sticky and moderately plastic; few fine, medium, and coarse roots; few fine tubular pores; 35 percent gravel and 15 percent cobbles; slightly acid (pH 6.5); clear irregular boundary. (0 to 19 inches thick)
R--53 inches; andesitic basalt bedrock
TYPE LOCATION: Baker County, Oregon
Section 16 (SE , SW , SW ), T. 11 S., R. 36 E.
Latitude: 44 degrees, 36 minutes, 13 seconds north
Longitude: 118 degrees, 18 minutes, 33 seconds west
UTM Coordinates: Zone 11; Northing: 4,939,751.5; Easting: 396,108.6
USGS Quadrangle: Pogue Point
RANGE IN CHARACTERISTICS:
Soil Temperature: frigid regime
Mean Annual Soil Temperature: 39 to 41 degrees F
Mean Summer Soil Temperature: 46 to 49 degrees F
Mean Winter Soil Temperature: 32 to 36 degrees F
Soil Moisture: xeric regime; dry 45 to 60 days in summer
Particle-size Control Section: top of mineral soil surface to 40 inches below mineral soil surface
Upper part (ashy): 14 to 22 inches thick
Clay content (wt. avg.): 4 to 6 percent
Rock fragment content (wt. avg.): 5 to 30 percent
Lower Part (loamy-skeletal):
Clay content (wt. avg.): 8 to 17 percent
Rock fragment content (wt. avg.): 35 to 55 percent
Rock fragment shape: angular or subangular
Diagnostic Horizon Features:
andic soil properties: upper boundary at the mineral surface; 14 to 22 inches thick
Al+1/2Fe(aox): 1.0 to 2.5 percent
bulk density: 0.65 to 1.0 g/cc
P retention: 40 to 90 percent
0.02-2.0 mm fraction: 40 to 60 percent of fine earth
glass content in the 0.02 to 2.0 mm fraction: 60 to 90 percent
water content at 1500 kPa (air dried): 5 to 12 percent
8Si + 2Fe (aox): 5 to 12 percent
8Si - 2Fe (aox): 4 to 8 percent
ochric epipedon: 1 to 12 inches thick
cambic horizons:
upper: 10 to 20 inches thick
lower: 14 to 60 inches thick
lithic contact, depth: 40 to 60 inches
Major Horizons:
A horizon (AB in some pedons)
color, moist: 7.5YR 3/2; 10YR 3/2, 3/3, 4/2, 4/3, 5/3
color, dry: 7.5YR 5/4; 10YR 5/3, 6/3, 6/4
texture: ASHY-SIL, GR-ASHY-L
clay content: 4 to 7 percent
rock fragment content: 0 to 30 percent
gravel: 0 to 30 percent
cobbles: 0 to 5 percent
stones: 0 to 5 percent
reaction: slightly acid or neutral; pH: 6.1 to 7.3
organic carbon: 1 to 5 percent
Bw horizon
color, moist: 7.5YR 3/4, 4/4, 5/4; 10YR 4/4, 5/4
color, dry: 7.5YR 5/4; 10YR 5/4, 6/3, 6/4, 7/4
texture: ASHY-SIL, GR-ASHY-SIL, ST-ASHY-SIL, GR-ASHY-L, CB-ASHY-SL[r1]
clay content: 4 to 6 percent
rock fragment content: 5 to 30 percent
gravel: 5 to 20 percent
cobbles: 0 to 10 percent
stones: 0 to 5 percent
reaction: slightly acid or neutral; pH: 6.1 to 7.3
organic carbon: 0.6 to 1.0 percent
2BEb horizon (2AEb or 2Eb in some pedons)
color, moist: 7.5YR 4/3, 4/4; 10YR 4/3, 5/3, 5/4
color, dry: 7.5YR 5/4; 10YR 5/4, 6/3, 6/4
texture: STV-L, GR-L, GR-SL, GR-SIL, CBV-L, STV-SL, GRV-L
clay content: 5 to 16 percent
rock fragment content: 30 to 60 percent
gravel: 20 to 50 percent
cobbles: 0 to 15 percent
stones: 0 to 15 percent
reaction: slightly acid or neutral; pH: 6.1 to 7.3
2Bwb horizon
color, moist: 5YR 4/4; 7.5YR 4/3; 10YR 4/3, 4/4, 5/3
color, dry: 5YR 5/4; 7.5YR 6/4; 10YR 5/3, 5/4, 6/4
texture: STV-L, GRV-L, GRV-SL, STV-L, STX-SL, GRX-SL , GRX-L, GRX-LS
clay content: 8 to 17 percent
rock fragment content: 40 to 75 percent
gravel: 25 to 55 percent
cobbles: 5 to 20 percent
stones: 0 to 20 percent
reaction: slightly acid or neutral; pH: 6.1 to 7.3
COMPETING SERIES:
These are the Endcreek (T), Kingbolt (T),
Larrupin, Raggedrock (T), Tertoo (T), and Twocolor (T) series. Soils with a similar classification include the
Brannan,
Capoose,
Crackler,
Elbowlake,
Faraway (T),
Kellerbutte,
Kootenai,
Natapoc,
Nevine,
Olot,
Rouen,
Saska, and
Vingulch (T) series.
Endcreek soils - moderately deep (20 to 40 inches) to a lithic contact (granite); loamy-skeletal part of the pscs has 3 to 6 percent clay and more than 15 percent cobbles and stones of granitic origin
Kingbolt soils - moderately deep (20 to 40 inches) to a lithic contact (argillite)
Larrupin soils - very deep (>60 inches); ashy part of pscs has 30 to 60 percent volcanic glass and have a texture of ashy loamy sand or ashy sandy loam; loamy-skeletal part of pscs has 35 to 60 percent rounded or subrounded gravel and cobbles of mixed origin from mudflow material
Raggedrock soils - deep (40 to 60 inches) to a paralithic contact (granite); loamy-skeletal part of the pscs has 40 to 75 percent subrounded rock fragments of granite origin
Tertoo soils - very deep (>60 inches); loamy-skeletal part of pscs have 40 to 75 percent rounded rock fragments of mixed origin
Twocolor soils - very deep (>60 inches); loamy-skeletal part of pscs has 50 to 70 percent rounded rock fragments of granite origin
Brannan soils - ashy part of pscs has 15 to 35 percent channers and flags and glassy mineralogy; loamy-skeletal part of the pscs has 15 to 30 percent clay and 35 to 60 percent channers and flags
Capoose soils - moderately deep (20 to 40 inches) to a lithic contact (granite); ashy part of pscs has 30 to 60 percent volcanic glass and glassy mineralogy; dry 60 to 75 consecutive days following the summer solstice
Crackler soils - ashy part of pscs has glassy mineralogy; loamy-skeletal part of the pscs has 18 to 35 percent clay and 40 to 75 percent rock fragments of argillite origin; MAST is 43 to 47 degrees F.
Elbowlake soils - moderately deep (20 to 40 inches) to a densic contact; ashy part of pscs has 30 to 60 percent volcanic glass and glassy mineralogy; loamy-skeletal part of the pscs has 35 to 60 percent rock fragments of metasedimentary origin
Farway soils - very deep (>60 inches); ashy part of pscs has 30 to 60 percent volcanic glass, texture of ashy sandy loam, and glassy mineralogy; dry 60 to 75 days consecutive days following the summer solstice
Kellerbutte soils - very deep (>60 inches); ashy part of pscs has 30 to 60 percent volcanic glass and glassy mineralogy
Kootenai soils - very deep (>60 inches); ashy part of pscs has 30 to 60 percent volcanic glass, 0.4 to 1.0 percent Al + 1/2Fe(aox), and glassy mineralogy; loamy-skeletal part of pscs has coarse sand or loamy coarse sand textures
Natapoc soils - very deep (>60 inches) to a densic contact; ashy part of pscs 30 to 60 percent volcanic glass, ashy sandy loam texture, and glassy mineralogy; dry 60 to 75 consecutive days following the summer solstice
Nevine soils - deep (40 to 60 inches) to a densic contact; ashy part of pscs has 30 to 60 percent volcanic glass and glassy mineralogy; dry 60 to 75 consecutive days following the summer solstice
Olot soils - moderately deep (20 to 40 inches) to a lithic contact (basalt); ashy part of pscs has glassy mineralogy; loamy-skeletal part of the pscs has 25 to 35 percent clay and 35 to 75 percent angular and subangular rock fragments of basalt origin
Rouen soils - moderately deep (20 to 40 inches) to a lithic contact (argillite); ashy part of pscs has glassy mineralogy; loamy-skeletal part of the pscs has 25 to 35 percent clay and 35 to 70 percent angular and subangular gravel and cobbles of argillite origin
Saska soils - very deep (>60 inches); ashy part of pscs has 30 to 60 percent volcanic glass and glassy mineralogy with a texture of ashy loamy sand or ashy sandy loam mixed with pumice; Bs horizons 14 to 24 inches thick
Vingulch soils - moderately deep (20 to 40 inches) to a lithic contact (gneiss); ashy part of pscs has 30 to 60 percent volcanic glass, glassy mineralogy, and texture of ashy loamy very fine sand and ashy coarse sandy loam with 10 to 25 percent pumice; the loamy-skeletal part of the pscs has 35 to 60 percent rock fragments of gneiss origin; dry 60 to 75 consecutive days following the summer solstice
GEOGRAPHIC SETTING:
Landform: backslopes of mountains
Slope gradient: 0 to 90 percent
Parent material: volcaniclastic volcanic ash over colluvium
Lithology: Mazama ash over andesitic basalt.
Elevation: 5,200 to 6,000 feet
Climate: characterized by cold, wet winters and cool, moist summers
Mean annual precipitation: 20 to 35 inches
Mean annual air temperature: 37 to 39 degrees F
Frost-free period: 30 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Bigcow (T) soils - occur in planer to concave positions and moderately steep footslopes; deep or very deep to a lithic contact; has less than 14 inch pure ash mantle
Olot soils - occur on backslopes in planer to concave positions; 20 to 40 inches to a lithic contact; 25 to 35 percent clay in lower part of pscs
Wonder (T) soils - occur on backslopes; 20 to 40 inches to a lithic contact; has less than 14 inch pure volcanic ash mantle
DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: moderate
USE AND VEGETATION:
Use: watershed, wildlife habitat, timber production, livestock grazing and recreation
Native vegetation: grand fir, Douglas fir, ponderosa pine, western larch, lodgepole pine, grouse whortleberry, Oregon grape holly, bearberry, common prince's pine, Oregon boxwood, hearleaf arnica, woods strawberry, lupine, sidebells pyrola, white flowered hawkweed, pinegrass, northwest sedge and elk sedge.
DISTRIBUTION AND EXTENT:
MLRA--E43c, Blue Mountains
Distribution: Blue Mountains of northeastern Oregon
Extent: small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Baker County, Oregon; 2004. The name is from a mountain near Unity.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
ochric epipedon: 3 to 6 inches; A horizon
cambic horizons:
upper: 6 to 19 inches; Bw horizon
lower: 19 to 53 inches; 2Ebb, 2Bwb1, 2Bwb2 horizons
andic soil properties: 3 to 19 inches; A, Bw horizons
particle-size control section:
upper (ashy): 3 to 19 inches; A, Bw horizons
lower (loamy-skeletal): 19 to 43 inches: 2Eb, 2Bwb1, 2Bwb2 horizons
USFS Ecological site: dominant - ABGR/VASC; others may include - PICO(ABGR)/VASC, ABGR/CARU or PSME/SYOR.