LOCATION RAGGEDROCK ORTentative Series
TAXONOMIC CLASS: Ashy over loamy-skeletal, amorphic over isotic, frigid Typic Vitrixerands
TYPICAL PEDON: Raggedrock ashy silt loam - woodland, on a 37 percent south-facing slope at an elevation of 5,760 feet. (Colors are for moist soil unless otherwise noted. Soil textures are apparent field textures.)
Oi--0 to 0.5 inches; needles, grasses, twigs
Oe--0.5 to 1 inches; decomposing needles, grasses, twigs
A--1 to 5 inches; dark brown (7.5YR 3/3) ashy silt loam, brown (7.5YR 5/4) dry; weak medium and fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; weakly smeary; few very fine , fine, medium and coarse roots; few very fine irregular, and few very fine and medium tubular pores; neutral (pH 6.8); clear wavy boundary. (3 to 7 inches thick)
Bw--5 to 16 inches; brown (7.5YR 4/4) ashy silt loam, brown (7.5YR 5/4) dry; weak medium subangular blocky structure parting to weak fine subangular blocky; soft, very friable, nonsticky and nonplastic; weakly smeary; few very fine, fine, medium and coarse roots; few very fine irregular and common very fine tubular pores; 2 percent gravel; neutral (pH 6.8); abrupt wavy boundary. (11 to 14 inches thick)
2EBb--16 to 21 inches; dark yellowish brown (10YR 4/4) gravelly sandy loam, yellowish brown (10YR 5/4) dry; weak medium subangular blocky structure parting to weak fine or very fine subangular blocky; slightly hard, very friable, nonsticky and nonplastic; few fine and few medium roots; common very fine irregular and few very fine tubular and common fine interstitial pores; 20 percent gravel and 10 percent cobbles; slightly acid (pH 6.5); clear wavy boundary. (5 to 14 inches thick)
2Bwb--21 to 29 inches; dark yellowish brown (10YR 4/4) very gravelly sandy loam, yellowish brown (10YR 5/4) dry; weak fine and very fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; few medium roots; common very fine interstitial and common fine irregular pores; 30 percent gravel and 15 percent cobbles; slightly acid (pH 6.5); clear wavy boundary. (8 to 15 inches thick)
2BCb--29 to 42 inches; dark yellowish brown (10YR 4/4) very gravelly sandy loam, light yellowish brown (10YR 6/4) dry; weak medium and fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; roots were not recorded for this horizon; common very fine tubular and common very fine and fine irregular pores; 35 percent gravel and 15 percent cobbles; slightly acid (pH 6.5); abrupt wavy boundary. (12 to 13 inches thick)
2Cr--42 inches; soft weathered granite bedrock
TYPE LOCATION: Grant County, Oregon
Section 03 (NW , SW , NE ), T. 10 S., R. 33 E.
Latitude: 44 degrees, 43 minutes, 47 seconds N
Longitude: 118 degrees, 43 minutes, 34 seconds W
UTM Zone 11; northing: 4,954,380; easting: 363,310
USGS Quadrangle: Boulder Butte
RANGE IN CHARACTERISTICS:
Soil Temperature: frigid regime
Mean Annual Soil Temperature: 40 to 41 degrees F
Mean Summer Soil Temperature: 47 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: mineral soil surface to 40 inches below mineral surface
Upper part (ashy): 14 to 21 inches thick
Clay content (wt. avg.): 4 to 8 percent
Rock fragment content: 0 to 30 percent
Lower Part (loamy-skeletal): 19 to 26 inches thick
Clay content (wt. avg.): 3 to 10 percent
Rock fragment content (wt. avg.): 40 to 75 percent
Rock fragment shape: subrounded
Diagnostic Horizon and Features:
andic soil properties: upper boundary at the mineral surface; 14 to 21 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 0.02-2.0mm 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: 3 to 7 inches thick
cambic horizons:
upper: 11 to 14 inches thick
lower: 17 to 29 inches thick
paralithic contact, depth: 40 to 60 inches
Major Horizons:
A horizon:
color, moist: 7.5YR 2.5/2, 3/1, 3/3
color, dry: 7.5YR 4/2, 4/3, 4/4, 5/4
texture: ASHY-SIL, BY-ASHY-SIL
clay content: 4 to 7 percent
rock fragment content: 0 to 20 percent
gravel: 0 to 10 percent
cobbles: 0 to 5 percent
stones: 0 to 5 percent
boulders: 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 3/3, 3/4, 4/3, 4/4
color, dry: 7.5YR 4/4, 5/4, 6/4; 10YR 6/4
texture: ASHY-SIL, BY-ASHY-SIL
clay content: 4 to 10 percent
rock fragment content: 0 to 30 percent
gravel: 0 to 15 percent
cobbles: 0 to 10 percent
stones: 0 to 5 percent
boulders: 0 to 5 percent
reaction: slightly acid or neutral; pH: 6.1 to 7.3.
organic carbon: 0.6 to 1.0 percent
2EBb horizon: (2Eb in some pedons)
color, moist: 7.5YR 4/3; 10YR 4/3, 4/4
color, dry: 7.5YR 5/4; 10YR 5/4
texture: GRV-SL, CBV-SL, GR-SL, STV-LS, CBX-LS
clay content: 4 to 10 percent
rock fragment content: 30 to 70 percent
gravel: 10 to 25 percent
cobbles: 5 to 20 percent
stones: 0 to 30 percent
boulders: 0 to 5 percent
reaction: slightly acid or neutral; pH: 6.1 to 7.3
2Bwb horizon (includes 2BCb in some pedons)
color, moist: 7.5YR 3/4, 4/4; 10YR 4/4, 5/4
color, dry: 7.5YR 5/4, 6/4; 10YR 5/4, 6/4
texture: GRV-SL, GRX-LS, CBV-SL, STX-LS, CBX-LS
clay content: 2 to 10 percent
rock fragment content: 40 to 80 percent
gravel: 15 to 40 percent
cobbles: 10 to 20 percent
stones: 0 to 40 percent
boulders: 0 to 5 percent
reaction: slightly acid or neutral; pH: 6.1 to 7.3
COMPETING SERIES:
These are the Endcreek (T), Kingbolt (T),
Larrupin, Pougepoint (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 pscs has 45 to 60 percent angular rock fragments of granite origin
Kingbolt soils - moderately deep (20 to 40 inches) to a lithic contact (argillite); loamy-skeletal part of pscs has 35 to 75 percent angular and subangular rock fragments of argillite or other metasedimentary, metavolcanic or rhyolitic bedrock with less than 15 percent cobbles and stones
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
Pougepoint soils - deep (40 to 60 inches ) to lithic contact (granite); loamy-skeletal part of the pscs has 40 to 75 percent angular and subangular 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 - deep (40 to 60 inches) to a lithic contact (argillite); 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: on lower to middle backslopes of mountains
Slope gradient: 15 to 90 percent
Parent material: volcaniclastic volcanic ash over colluvium and residuum
Lithology: Mazama ash over granite
Elevation: 5,200 to 5,800 feet
Climate: cold, wet winters and cool, dry summers
Mean annual precipitation: 29 to 35 inches
Mean annual air temperature: 38 to 39 degrees F
Frost-free period: 30 to 70 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Coyotebluff (T) soils - occur on steep planar backslopes; 40 to 60 inches to bedrock; has mollic epipedon; <14 inches of volcanic ash
Endcreek (T) soils - occur on moderately steep backslopes and footslopes; 20 to 40 inches to bedrock
Golfer (T) soils - occur on convex steep backslopes; 20 to 40 inches to bedrock; <14 inches of ash influence
Piutespring (T) soils - occur on very steep backslopes; 20 to 40 inches to bedrock; <14 inch ash mantle
Powderriver (T) soils - occur on steep backslopes; 10 to 20 inches to bedrock; influence of volcanic ash
DRAINAGE AND PERMEABILITY:
Drainage: well drained
Permeability: moderately rapid to rapid
USE AND VEGETATION:
Use: timber production, watershed, wildlife, recreation, range
Native vegetation: grand fir, Douglas fir, lodgepole pine, big huckleberry, grouse huckleberry, heartleaf arnica, side-flowered mitrewort, broadpetal strawberry, pinegrass, elk sedge, northwest sedge, mountain brome and western fescue
DISTRIBUTION AND EXTENT:
MLRA--E43c; Blue Mountains
Distribution: Central Blue Mountains of northeastern Oregon.
Extent: small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES PROPOSED: Grant County, Oregon 2004. Name is from a summit.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
ochric epipedon: 1 to 5 inches; A horizon
cambic horizons:
upper: 5 to 16 inches; Bw horizon
lower: 16 to 42 inches; EBb, 2Bwb horizon
andic soil properties: 1 to 16 inches; A, Bw horizons
particle-size control section:
ashy part: 1 to 16 inches; A, Bw horizons
loamy-skeletal part: 16 to 41 inches; 2Eb, 2Bwb, 2BCb horizons
paralithic contact : 41 inches; 2Cr
USFS Ecological site: Dominant: ABGR/VAME; others may include: ABGR/VASC