LOCATION CANSPAN OR
Tentative Series
Rev. TDT/JRD
12/2024
CANSPAN SERIES
Landscape--mountains, plateaus
Landform--benches, ridges, mountain slopes
Slope--5 to 30 percent
Parent material--residuum and colluvium derived from hard volcanic rock with a minor influence of volcanic ash in the surface
Mean annual precipitation--610 mm
Mean annual air temperature--6 degrees C
Depth class--very shallow
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--cryic
Soil moisture subclass--typic
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Lithic Argicryolls
TYPICAL PEDON: Canspan very cobbly ashy loamy sand--rangeland, on a 5 percent convex south facing slope at 2095 m elevation. (Colors are for dry soil unless otherwise noted.) The surface is covered with 10 percent gravel, 20 percent cobbles, 10 percent stones and 5 percent boulders.
A1--0 to 5 cm; dark brown (7.5YR 3/2) very cobbly ashy loamy sand, very dark brown (7.5YR 2.5/3) moist; moderate medium platy structure parting to weak fine granular structure; soft, very friable, non-sticky and non-plastic; many very fine and fine roots; many very fine and fine vesicular and irregular pores; 10 percent gravel, 20 percent cobbles, and 10 percent stones; neutral (pH 6.6); abrupt smooth boundary.
Bt1--5 to 13 cm; dark brown (7.5YR 3/3) very cobbly sandy clay loam, very dark brown (7.5YR 2.5/3) moist; moderate fine and medium subangular blocky structure; soft, friable, slightly sticky and slightly plastic; many very fine and fine and common medium roots; many very fine and fine irregular pores; common faint clay films on faces of peds; 10 percent gravel and 20 percent cobbles and 10 percent stones; slightly acid (pH 6.4); clear wavy boundary.
Bt2--13 to 23 cm; dark brown (7.5YR 3/3) extremely cobbly sandy clay loam, very dark brown (7.5YR 2.5/3) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and moderately plastic; few very fine to medium roots; many very fine and fine irregular pores; common distinct clay films on faces of peds and on rock fragments; 20 percent gravel, 30 percent cobbles; and 20 percent stones; slightly acid (pH 6.2); clear wavy boundary.
R--23 cm; basalt bedrock
TYPE LOCATION: Wheeler County, Oregon; on the Ochoco National Forest near the summit of Spanish Peak; SW , Section 30, T 13 S., R 25 E., at the end of the 3800-200 road on the summit.; Anatone USGS 7.5' Topographic Quadrangle; latitude 44.4066167, longitude -119.7752000, WGS84 Datum (coordinates determined with a GPS)
RANGE IN CHARACTERISTICS:
Mean annual soil temperature: 3 to 6 degrees C.
Soil moisture: Usually moist in the moisture control section during late fall, winter, and spring; dry from June through early October for 75 to 90 consecutive days in the four months following the summer solstice.
Depth to lithic contact--10 to 25 cm
Estimated properties of layers influenced with volcanic ash
*Volcanic ash thickness--3 to 10 cm
*Acid oxalate extractable Al+1/2Fe--0.4 to 2.0 percent
*Volcanic glass content--20 to 30 percent
Particle-size control section--from the surface to 23 cm
*Clay content--averages 18 to 35 percent
*Total rock fragments--averages 35 to 60 percent, mainly cobbles
*Lithology--rock fragments are volcanic rocks such as basalt and andesite.
A horizon
*Hue--7.5YR moist or dry
*Value--2 or 2.5 moist, 3 or 4 dry
*Chroma--2 or 3 moist or dry
*Fine earth texture--loamy sand, sandy loam
*Clay content--9 to 18 percent
*Sand content--55 to 85 percent
*Organic matter content--1 to 2 percent
*Total rock fragments-- 35 to 60 percent
*Gravel content--0 to 20 percent
*Cobble content--10 to 30 percent
*Stone content--0 to 10 percent
*Boulder content--0 to 5 percent
*Reaction--neutral
*Thickness--3 to 8 cm
Bt horizons
*Hue--7.5YR moist or dry
*Value--2 or 2.5 moist, 3 or 4 dry
*Chroma--2 or 3 moist or dry
*Fine earth texture--sandy clay loam, clay loam
*Clay content--18 to 35 percent
*Sand content--30 to 65 percent
*Organic matter content--0.5 to 1 percent
*Total rock fragments--35 to 80 percent
*Gravel content--10 to 25 percent
*Cobble content--20 to 40 percent
*Stone content--10 to 20 percent
*Boulder content--0 to 5 percent
*Reaction--slightly acid to neutral
*Thickness--5 to 20 cm
COMPETING SERIES:
Bushpark--25 to 50 cm to lithic contact; dry for less than 60 days
Copenhaver--25 to 50 cm to lithic contact; ustic soil moisture regime
Donkehill--25 to 50 cm to lithic contact; contain secondary identifiable carbonates
Hogmalat--25 to 50 cm to lithic contact; lacks volcanic ash influence; moderately to strongly acid throughout the profile
Layview--25 to 50 cm to lithic contact; lacks volcanic ash influence
Maygal--36 to 50 cm to lithic contact; lacks volcanic ash influence; coarse fragments dominated by gravels
Mosroc--23 to 50 cm to granitic lithic contact; lacks volcanic ash influence
Mountpatterson--36 to 50 cm to lithic contact
Nielsen--25 to 50 cm to sandstone or quartzite lithic contact; dominated by channers
Nieman--25 to 50 cm to lithic contact; ustic soil moisture regime
Notstew--20 to 36 cm to lithic contact
Thiefridge--36 to 50 cm to lithic contact; lacks volcanic ash influence.
GEOGRAPHIC SETTING:
Elevation--1830 to 2130 m
Climate--cool, moist winters and cool, dry summers
Mean annual precipitation--500 to 910 mm
Mean annual air temperature--2 to 6 degrees
Frost-free period--30 to 60 days
Lithology--residuum and/or colluvium derived from Columbia River Basalts or andesites and tuffs of the Clarno Formation with a minor influence of Mt Mazama volcanic ash
GEOGRAPHICALLY ASSOCIATED SOILS:
Chochoco--occur on mountain slopes and benches; 50 to 100 cm to lithic contact; lack organic horizon; supports rangeland vegetation
Spanoch--occur on mountain sideslopes and benches; 100 to 150 cm to lithic contact; 18 to 36 cm of volcanic ash
Wineburger--occur on mountain slopes and benches; 40 to 80 cm of andic soil properties in surface; dry for 45 to 60 days
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage--well drained
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--moderately low
USE AND VEGETATION:
Use--livestock grazing, wildlife habitat and water supply
Potential native vegetation--stiff sagebrush, lupine, prickly phlox, Sandberg's bluegrass, sheep fescue, and bluebunch wheatgrass; low sagebrush can occur on pedons with thicker surfaces
Plant Association--SD9111; ARRI2/POSA3. R6 E 79-004 Hall, Fred C; 1998
DISTRIBUTION AND EXTENT: Central Oregon, Ochoco Mountains (southwest Blue Mountains, MLRA 10. The soil is of small extent.
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES PROPOSED: Wheeler County, (Ochoco National Forest), Oregon, 2014.
REMARKS:
Diagnostic horizons and features
*Mollic epipedon thickness--18 to 25 cm
*Argillic horizon--5 to 23 cm
*Depth to bedrock--12 to 25 inches to a lithic contact
*Reaction: slightly acid to neutral.
________________________________________
National Cooperative Soil Survey
U.S.A.