LOCATION DUSTIN OR
Tentative Series
SCW/TDT
02/2025
DUSTIN SERIES
Landscape--plateaus and foothills
Landform--hillslopes, structural benches, plateaus
Slope--2 to 75 percent
Parent Material--colluvium over basalt
Mean annual precipitation--about 250 mm
Mean annual air temperature--about 10 degrees C
Depth class--very deep
Drainage class--well drained
Soil moisture regime--aridic
Soil temperature regime--mesic
Soil moisture subclass--xeric
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Calcidic Haploxerolls
TYPICAL PEDON: Dustin very cobbly coarse sandy loam--rangeland, on a 52 percent north slope at an elevation of 660 meters.
A--0 to 25 cm; very cobbly coarse sandy loam, brown (7.5YR 4/2) dry, dark brown (7.5YR 3/2) moist; moderate fine and very fine granular structure; loose, nonsticky, nonplastic; many very fine roots and few fine roots; common very fine irregular and few fine irregular pores; 15 percent stones, 30 percent cobbles, and 10 percent gravel; slightly alkaline (pH 7.6); gradual wavy boundary
Bw--25 to 99 cm; very cobbly coarse sandy loam, brown (7.5YR 4/2) dry, dark brown (7.5YR 3/2) moist; weak medium subangular blocky structure; loose, nonsticky, nonplastic; common very fine roots; common very fine tubular pores; 10 percent stones, 25 percent cobbles, and 10 percent gravel; slightly alkaline (pH 7.8); gradual wavy boundary
Bk--99 to 150 cm; very cobbly coarse sandy loam, brown (7.5YR 4/2) dry, dark brown (7.5YR 3/2) moist; weak fine subangular blocky structure; loose, nonsticky, nonplastic; few very fine roots; common very fine tubular pores; carbonates coating the bottom of rock fragments; 10 percent stones, 20 percent cobbles, and 15 percent gravel; moderately alkaline (pH 8.0).
TYPE LOCATION: Grant County, Oregon, located about 1 km northeast of the community of Kimberly on the east side of the John Day River (North Fork) 700 m south and 335 m east of the NW corner section 29 , T. 9 S. , R. 26 E. : latitude 44.7620621, longitude -119.6283112, datum WGS84 (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 12 degrees C
Soil Moisture--The soils are usually dry in all parts of the soil moisture control section for more than half of the time when the temperature is above 5 degrees C.
Thickness of mollic epipedon--25 to 50 cm
Depth to secondary carbonate accumulation--76 to 112 cm
Depth to bedrock--greater than 150 cm
Reaction--slightly to moderately alkaline
Particle Size Control Section:
Clay--5 to 18 percent clay
Total Rock Fragment--35 to 70 percent
Gravel content--10 to 35 percent
Cobble content--20 to 75 percent
Stone content--10 to 45 percent
A horizon
*Hue--7.5YR or 10YR
*Value--2 or 3 moist, 4 or 5 dry
*Chroma--2 or 3
*Fine earth texture--coarse sandy loam
*Clay--5 to 15 percent
*Sand-- 60 to 75 percent
*Gravel--10 to 20 perent
*Cobble--20 to 30 percent
*Stone--5 to 15 percent
*Organic matter--1 to 3 percent
*Reaction--6.6 to 7.8 (neutral to slightly alkaline)
*Thickness--20 to 40 cm
Bw horizon
*Hue--7.5YR or 10YR
*Value--2 or 3 moist, 4 or 5 dry
*Chroma--2 or 3
*Fine earth texture--coarse sandy loam, loam
*Clay--5 to 18 percent
*Sand--45 to 75 percent
*Gravel--10 to 25 perent
*Cobble--15 to 25 percent
*Stone--10 to 20 percent
*Organic matter--0.5 to 2 percent
*Reaction--6.6 to 7.8 (neutral to slightly alkaline)
*Thickness--38 to 80 cm
Bk horizon
*Hue--7.5YR or 10YR
*Value--3 to 5 moist, 4 or 5 dry
*Chroma--2 or 3
*Fine earth texture-- coarse sandy loam, loam
*Clay--5 to 18 percent
*Sand--45 to 75 percent
*Gravel--15 to 25 perent
*Cobble--15 to 30 percent
*Stone--0 to 10 percent
*Organic matter--0.3 to 0.8 percent
*CaCO3 equivalent-- 2 to 5 percent
*Reaction--6.6 to 7.8 (neutral to slightly alkaline)
COMPETING SERIES:
Haystack--on alluvial fans and average 15 to 25 percent clay in the control section
Heytou--moderately deep to dense glacial till
Nighthawk--have greater than 15 percent calcium carbonate equivalent in the control section
Olex--have 12 to 25 inch thick silt loam mantle over a skeletal discontinuity
Peshastin--have carbonates at a depth of 38 to 70 cm
Redcanyon--moderately deep to bedrock
Strat--have sandy textures in the lower part of the particle size control section expressed as a Bkq horizon
GEOGRAPHIC SETTING:
Elevation--550 to 730mm
Slope--2 to 75 percent
Climate--cool moist winters, hot dry summers
Mean annual precipitation--230 to 305 mm
Mean annual air temperature--8 to 12 degrees C
Frost-free period--80 to 140 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Drybed--occur on gently sloping terraces and are fine-loamy
Dryck--occur on floodplains and are coarse-loamy over sandy or sandy-skeletal
Courtrock--occur on alluvial fans and side slopes and are coarse-loamy
Exfo--occur on adjacent side slopes, are very shallow, and are sandy-skeletal
Kimberly--occur on floodplains and are coarse-loamy
McCoin--occur on undulating to rolling hills, shallow to a paralithic contact, and are loamy
Weirman--occur on floodplains and are sandy-skeletal
DRAINAGE AND PERMEABILITY:
Drainage--well drained
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--high to very high
USE AND VEGETATION:
Use--livestock grazing, wildlife habitat
Vegetation--bluebunch wheatgrass, big sagebrush, bitterbrush
Typical Ecological Site--JD Loamy 9-12 PZ (R010XB034OR)
DISTRIBUTION AND EXTENT:
East-central Oregon; MLRA 10; small extent
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED:
Grant County Area, Oregon 2003; the name is derived from Dustin Point, a prominent hilltop located 2 miles south of the town of Monument.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
*Particle-size control section--25 to 100 cm
*Mollic epipedon--0 to 40 cm
*Cambic horizon--25 to 100 cm
*Secondary carbonates--100 to 155 cm
Dustin soils may have dark, lithochromatic colors that continue below 50 cm, but the organic matter is less than one percent. Lenses of coarser material may occur anywhere in the profile.
National Cooperative Soil Survey
U.S.A.