LOCATION PUDERBAUGHRIDGE         OR

Established Series
Rev. RLW/KMS
11/2018

PUDERBAUGHRIDGE SERIES

Landscape--mountains
Landform--mountain slopes
Slope--30 to 90 percent
Parent material--loess over colluvium and residuum derived from limestone with an influence of volcanic ash in the upper part
Mean annual precipitation--about 350 mm
Mean annual air temperature--about 10 degrees C
Depth class--shallow to lithic bedrock
Drainage class--well drained
Soil moisture regime--aridic (torric)
Soil temperature regime--mesic
Soil moisture subclass--xeric

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Aridic Lithic Haploxerolls

TYPICAL PEDON: Puderbaughridge extremely cobbly ashy silt loam in an area of rangeland, on a slope of 27 percent at an elevation of 957 m

A--0 to 33 cm; extremely cobbly ashy silt loam, very dark grayish brown (10YR 3/2) dry, very dark brown (10YR 2/2) moist; weak very fine subangular blocky structure and weak fine subangular blocky; soft, very friable, slightly sticky and slightly plastic; many very fine, common fine, and few medium and coarse roots throughout; common very fine interstitial and tubular pores; 20 percent gravel, 30 percent cobbles, and 15 percent stones; strongly alkaline (pH 8.5); clear wavy boundary

2Bk--33 to 46 cm; extremely cobbly loam, brown (10YR 4/3) dry, dark brown (10YR 3/3) moist; weak very fine subangular blocky structure; soft, very friable, slightly sticky and slightly plastic; common very fine, fine, and coarse and few medium roots throughout; few very fine interstitial pores; 10 percent fine carbonate concretions; 25 percent gravel and 35 percent cobbles; strongly alkaline (pH 8.5); abrupt irregular boundary

2R--46 cm; limestone

TYPE LOCATION: Wallowa County, Oregon; about 440 m west and 230 m south of the northeast corner of section 19, T. 5 S., R. 49 E., latitude 45.1204105, longitude -116.7646266, datum WGS 84 (coordinates from unknown source)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 12 degrees C
Soil moisture--usually dry in all parts one-half to three-fourths of the time when the soil temperature is higher than 5 degrees C
Depth to lithic contact--25 to 50 cm
Thickness of mollic epipedon--25 to 50 cm
Thickness of layers influenced by volcanic ash--18 to 40 cm

Estimated properties of layers influenced by volcanic ash
*Ammonium oxalate extractable Al + 1/2 Fe--0.3 to 0.5 percent
*0.02- to 2.0-mm fraction--more than 30 percent
*Volcanic glass in 0.02- to 2.0-mm fraction--5 to 15 percent

Particle-size control section
*Clay content--20 to 30 percent
*Total rock fragment content--more than 35 percent

A horizon
Fine-earth texture--loam
Clay content--15 to 25 percent
Sand content--40 to 50 percent
Organic matter content--2.5 to 4.0 percent
Total rock fragment content--60 to 90 percent
Gravel content--15 to 40 percent
Cobble content--20 to 40 percent
Stone content--10 to 30
Calcium carbonate content--0 to 3 percent
Reaction--7.9 to 9.0

2Bk horizon
Fine-earth texture--loam
Clay content--20 to 27 percent
Sand content--35 to 50 percent
Organic matter content--1 to 3 percent
Total rock fragment content--35 to 70 percent
Gravel content--15 to 30 percent
Cobble content--20 to 40 percent
Calcium carbonate content--1 to 5 percent
Reaction--7.9 to 9.0

COMPETING SERIES:
Aldax, Borid, Couleedam, Cox, Hendap, Kelsidar, Lickskillet--no volcanic glass
Bakeoven--lithic contact at a depth of 10 to 25 cm (very shallow)

GEOGRAPHIC SETTING:
Elevation--700 to 1040 m
Climate--cool, wet winters; hot, dry summers
Mean annual precipitation--280 to 380 mm
Mean annual air temperature--9 to 13 degrees C
Frost-free season--80 to 1140 days

GEOGRAPHICALLY ASSOCIATED SOILS: None given

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Saturation during normal years--none
Flooding--none
Ponding--none
Saturated hydraulic conductivity (Ksat)--moderately high

USE AND VEGETATION:
Use--livestock grazing, wildlife habitat
Potential native vegetation--bluebunch wheatgrass, Idaho fescue, Sandberg bluegrass, brome, woolly sunflower, Wyeth buckwheat, common yarrow, prairie Junegrass, lupine, phlox, serrate balsamroot

DISTRIBUTION AND EXTENT: Hells Canyon National Recreation Area in eastern Oregon; MLRA 9; small extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Wallowa-Whitman National Forest, Oregon; 2018

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Mollic epipedon--zone from the surface to a depth of 46 cm
*Volcanic glass--zone from the surface to a depth of 33 cm
*Depth to lithologic discontinuity--33 cm
*Particle-size control section--zone from 25 to 46 cm

07/2017--The Puderbaughridge series is limited in extent, but it was proposed because of unique limestone geology. The pedon was described by Bob Ottersberg in 1999. It was assigned to the aridic soil moisture regime, but it does not align with the typical precipitation levels of that regime. The estimated precipitation for the series was lowered, but it is still high for the aridic moisture regime.

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National Cooperative Soil Survey
U.S.A.