LOCATION BOLONY OR
Established Series
Rev. RJO/DAL/KMS
11/2018
BOLONY SERIES
Landscape--mountains, plateaus
Landform--plateaus, mountain slopes
Slope--15 to 60 percent
Parent material--loess over colluvium derived from basalt with an influence of volcanic ash in the upper part
Mean annual precipitation--about 420 mm
Mean annual air temperature--about 6 degrees C
Depth class--moderately deep to lithic bedrock
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic
TAXONOMIC CLASS: Fine-loamy, isotic, frigid Vitrandic Argixerolls
TYPICAL PEDON: Bolony ashy silt loam, forested, on a 35-percent, north-facing slope at an elevation of 1222 m
Oi--0 to 8 cm; slightly decomposed needles and twigs
Oe--8 to 10 cm; moderately decomposed organic matter
A--10 to 25 cm; ashy silt loam, brown (7.5YR 4/3) dry, very dark brown (10YR 2/2) moist; moderate medium subangular blocky structure parting to moderate fine subangular blocky; slightly hard, friable, slightly sticky and slightly plastic; common very fine, fine, and medium and few coarse roots; few fine and medium tubular pores; 10 percent gravel; neutral (pH 7.0); gradual smooth boundary
ABt--25 to 53 cm; gravelly ashy loam, dark yellowish brown (10YR 4/4) dry, dark brown (10YR 3/3) moist; moderate fine subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; common faint clay films lining tubular pores; common fine, medium, and coarse roots; few very fine, fine, and medium tubular pores; 15 percent gravel; slightly acid (pH 6.5); gradual smooth boundary
2Bt--53 to 74 cm; gravelly loam, yellowish brown (10YR 5/4) dry, dark brown (10YR 3/3) moist; weak fine and very fine subangular blocky structure; slightly hard, friable, moderately sticky and moderately plastic; few faint clay films on ped faces; few fine and medium roots; few very fine tubular pores; 20 percent gravel and 5 percent cobbles; slightly acid (pH 6.5); abrupt wavy boundary
2R--74 cm; basalt
TYPE LOCATION: Grant County, Oregon; in the NW1/4NW1/4NE1/4 of section 25, T. 8 S., R. 26 E.; latitude 44.8513265, longitude -119.5619975, datum WGS 84 (coordinates from unknown source)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--7 to 8 degrees C
Mean summer soil temperature--12 to 14 degrees C
Mean winter soil temperature--1 to 4 degrees C
Soil moisture--dry 60 to 90 consecutive days in summer
Thickness of mollic epipedon--25 to 50 cm
Depth to lithic contact--50 to 100 cm
Thickness of ash-influenced layers--31 to 43 cm
Estimated properties of layers influenced by volcanic ash
*Ammonium oxalate extractable Al + 1/2 Fe--0.3 to 0.8 percent
*0.02- to 2.0-mm fraction--30 to 50 percent
*Glass content in 0.02- to 2.0-mm fraction--5 to 15 percent
*1/3-bar bulk density--1.0 to 1.6 g/cm3
*Phosphate retention--20 to 40 percent
Particle-size control section
*Clay content--18 to 35 percent
*Total rock fragment content--5 to 30 percent
A horizon
Hue--7.5YR, 10YR
Value--2 or 2.5 moist, 3 or 4 dry
Chroma--2 moist, 2 or 3 dry
Fine-earth texture--ashy silt loam, ashy loam
Clay content--17 to 25 percent
Sand content--30 to 40 percent
Organic matter content--2.5 to 8 percent
Total rock fragment content--0 to 10 percent
Gravel content--0 to 10 percent
Cobble content--0 to 5 percent
Reaction--6.1 to 7.3
ABt horizon
Hue--7.5YR, 10YR
Value--2.5 or 3 moist, 3 or 4 dry
Chroma--2 or 3 moist, 3 or 4 dry
Fine-earth texture--ashy loam, ashy clay loam
Clay content--20 to 33 percent
Sand content--35 to 40 percent
Organic matter content--1 to 2 percent
Total rock fragment content--5 to 20 percent
Gravel content--5 to 15 percent
Cobble content--0 to 5 percent
Stone content--0 to 2 percent
Reaction--6.1 to 7.3
Thickness--13 to 33 cm
2Bt horizon
Hue--7.5YR, 10YR
Value--2.5 or 3 moist, 3 to 5 dry
Chroma--3 or 4 moist or dry
Fine-earth texture--clay loam, loam
Clay content--23 to 34 percent
Sand content--25 to 45 percent
Organic matter content--0.5 to 2 percent
Total rock fragment content--15 to 35 percent
Gravel content--10 to 25 percent
Cobble content--0 to 15 percent
Reaction--6.1 to 7.3
Thickness--10 to 58 cm
COMPETING SERIES:
Bly--100 to 150 cm or more (deep or very deep) to a duripan
Bolobin--15 to 30 percent volcanic glass in upper part
Forbord--no lithic contact within a depth of more than 150 cm
Forshey-- no lithic contact within a depth of more than 150 cm; formed in a mixed mantle of volcanic ash and loess over colluvium derived from granitic rock; 15 to 30 percent volcanic glass in mixed mantle
Hess--100 to 150 cm (deep) to a lithic contact (basalt, tuff); mollic epipedon 25 to 50 cm thick; 0 to 15 percent rock fragments and 5 to 50 percent pararock fragments in particle-size control section
Lidos--no lithic contact within a depth of more than 150 cm
Melhorn--no lithic contact within a depth of more than 150 cm; formed in a mixed mantle of volcanic ash and loess over colluvium derived from basalt; 20 to 30 percent volcanic glass in mixed mantle; cobbles in subsoil
Nibolob--100 to 150 cm (deep) to a lithic contact (basalt); formed in a mixed mantle of volcanic ash and loess over colluvium derived from basalt; 15 to 30 percent volcanic glass in mixed mantle
Raycreek--50 to 100 cm (moderately deep) to a lithic contact (tuff); formed in a mantle of colluvium mixed with volcanic ash over residuum derived from metasedimentary rock; 15 to 30 percent volcanic glass in upper part; less than 15 percent rock fragments in argillic horizon
Salcreek--no lithic contact within a depth of more than 150 cm; formed in medisedimentary till; minor influence of volcanic ash above till; more than 50 percent sand in particle-size control section
Spartabutte--50 to 100 cm (moderately deep) to a lithic contact (granite); formed in loess with a minor influence of volcanic ash over colluvium derived from granitic rock; mollic epipedon 25 to 46 cm thick
Vangoe--100 to 150 cm (deep) to a lithic contact (basalt); dry 45 to 60 days in summer
GEOGRAPHIC SETTING:
Elevation--990 to 1650 m
Climate--cold, wet winters; cool, dry summers
Mean annual precipitation--360 to 480 mm
Mean annual air temperature--5 to 7 degrees C
Frost-free period--50 to 125 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Fivebit--on plateaus and backslopes; shallow to bedrock; minor influence of volcanic ash in loamy-skeletal colluvium; under scattered ponderosa pine,
Douglas-fir, or western juniper and big sagebrush and Idaho fescue
Nibolob--in gently sloping areas of plateaus; deep to bedrock; mixed ash mantle; under
Douglas-fir or ponderosa pine forest
Anatone--on plateaus, ridgetops, and south- or west-facing slopes; shallow; no argillic horizon; loamy-skeletal particle-size control section; minor ash influence; under sagebrush, Idaho fescue, and bluebunch wheatgrass
Bocker--on shoulders and summits of plateaus; very shallow; no argillic horizon; minor ash influence; under sagebrush, Idaho fescue, and bluebunch wheatgrass
Klicker--on backslopes; moderately deep; no argillic horizon; minor ash influence; under
Douglas-fir or ponderosa pine forest
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--moderately high
USE AND VEGETATION:
Use--timber production, watershed, wildlife habitat, recreation, livestock grazing
Potential natural vegetation--ponderosa pine, Douglas-fir, western juniper, grand fir, western larch, elk sedge, Idaho fescue, pinegrass, bluebunch wheatgrass, tailcup lupine, Wheeler bluegrass, heartleaf arnica, common yarrow, low Oregon grape, Sandberg bluegrass, white hawkweed, curl-leaf mountain mahogany, prairie smoke, Virginia strawberry, wax currant, western fescue, common snowberry, white spirea, northwestern sedge, Ross' sedge, bottlebrush squirreltail, prairie Junegrass, baldhip rose, scabland penstemon
DISTRIBUTION AND EXTENT: Foothills of central Rocky Mountains and Blue Mountains; MLRA 10; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Wallowa-Whitman National Forest; 2012
REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Mollic epipedon--zone from 10 to 53 cm
*Argillic horizon--zone from 25 to 74 cm
*Volcanic glass--zone from 10 to 53 cm
*Depth to lithologic discontinuity--53 cm
*Particle-size control section--zone from 25 to 74 cm
ADDITIONAL DATA: National Soil Survey Laboratory pedon number 99OR023008
National Cooperative Soil Survey
U.S.A.