LOCATION MCCARTYCREEK            OR

Established Series
IRD. JLW/RAW/DAL/KMS
02/2019

MCCARTYCREEK SERIES

Landscape--mountains, plateaus
Landform--mountain slopes, plateaus
Slope--0 to 90 cm
Parent material--colluvium derived from andesite or basalt mixed with loess, influence of volcanic ash in upper part
Mean annual precipitation--about 880 mm
Mean annual air temperature--about 6 degrees C
Depth class--moderately deep to lithic contact
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Vitrandic Haploxerolls

TYPICAL PEDON: McCartycreek cobbly ashy silt loam in an area of rangeland, on a 43-percent, north-facing slope at an elevation of 1378 m

A--0 to 23 cm; cobbly ashy silt loam, dark brown (7.5YR 3/4) dry, dark brown (7.5YR 3/2) moist; weak fine granular structure; slightly hard, very friable, slightly sticky and slightly plastic; common very fine and few fine roots; common very fine irregular pores; 10 percent gravel and 15 percent cobbles; neutral (pH 7.0); clear smooth boundary

AB--23 to 48 cm; very cobbly ashy silt loam, brown (7.5YR 4/4) dry, dark brown (7.5YR 3/3) moist; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few fine and medium roots; few very fine and fine tubular pores; 10 percent gravel, 25 percent cobbles, and 5 percent stones; neutral (pH 7.0); clear wavy boundary

2Bw--48 to 74 cm; extremely stony silt loam, strong brown (7.5YR 4/6) dry, dark brown (7.5YR 3/4) moist; weak fine subangular blocky structure; moderately hard, friable, slightly sticky and slightly plastic; few very fine roots; few very fine tubular pores; 10 percent gravel, 20 percent cobbles, and 30 percent stones; neutral (pH 7.0)

2R--74 cm; indurated basalt

TYPE LOCATION: Baker County, Oregon, about 230 m east and 628 m south of the northwest corner of section 24, T. 8 S., R. 45 E.; latitude 44.8582313, longitude -117.1613365, datum WGS 84 (coordinates and PLSS details estimated from point on a hard copy map)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--about 5 to 8 degrees C
Mean summer soil temperature--about 15 to 17 degrees C
Mean winter soil temperature--about -3 to 0 degrees C
Soil moisture--dry 60 to 90 consecutive days in summer
Thickness of mollic epipedon--20 to 50 cm
Depth to lithic contact--50 to 100 cm below mineral soil surface
Thickness of ash-influenced layers--20 to 50 cm

Estimated properties of layers influenced by volcanic ash
*Ammonium oxalate extractable Al + 1/2 Fe--0.3 to 0.9 percent
*Glass content in 0.02- to 2.0-mm fraction--5 to 15 percent

Particle-size control section
*Clay content--11 to 17 percent
*Total rock fragment content--35 to 85 percent

A horizon
Moist color--5YR 3/2, 7.5YR 3/2, 10YR 3/3
Dry color--5YR 4/3, 7.5YR 3/4, 7.5YR 4/3, 7.5YR 4/4, 10YR 4/4
Fine-earth texture--ashy loam, ashy silt loam
Clay content--10 to 14 percent
Sand content--20 to 50 percent
Organic matter content--2 to 6 percent
Total rock fragment content--20 to 55 percent
Gravel content--5 to 35 percent
Cobble content--0 to 15 percent
Stone content--0 to 15 percent
Reaction--5.6 to 7.3
Thickness--10 to 25 cm

AB horizon, and Bw1 horizon (where present)
Moist color--5YR 3/3, 7.5YR 3/2, 7.5YR 3/3, 10YR 3/3
Dry color--5YR 4/3, 5YR 4/4, 7.5YR 4/2, 7.5YR 4/3, 7.5YR 4/4, 10YR 4/4
Fine-earth texture--ashy loam, ashy silt loam
Clay content--10 to 18 percent
Sand content--15 to 45 percent
Organic matter content--1.5 to 5.5 percent
Total rock fragment content--30 to 60 percent
Gravel content--10 to 20 percent
Cobble content--10 to 35 percent
Stone content--5 to 20 percent
Reaction--5.6 to 7.3
Thickness--15 to 25 cm

2Bw horizon, and BC horizon (where present)
Moist color--5YR 3/4, 7.5YR 3/4, 7.5YR 4/2, 10YR 4/4
Dry color--5YR 4/3, 5YR 4/4, 7.5YR 4/2, 7.5YR 4/4, 7.5YR 4/6
Fine-earth texture--loam, silt loam
Clay content--13 to 19 percent
Sand content--15 to 45 percent
Organic matter content--0.5 to 2.5 percent
Total rock fragment content--50 to 90 percent
Gravel content--5 to 35 percent
Cobble content--20 to 60 percent
Stone content--5 to 30 percent
Reaction--5.6 to 7.3
Thickness--25 to 60 cm

COMPETING SERIES:
Dogtown--100 to 150 cm or more (deep, very deep) to paralithic contact (quartz diorite); O horizon of forest litter on surface; dry 45 to 60 consecutive days in summer
Frint--50 to 100 cm (moderately deep) to lithic contact (basalt); mollic epipedon 50 to 60 cm thick
Hogranch--100 to 150 cm (deep) to lithic contact (basalt); mollic epipedon 50 to 75 cm thick
Ironside--50 to 100 cm (moderately deep) to lithic contact (argillite); average of 5 to 17 percent clay and 35 to 60 percent angular gravel in particle-size control section
Magill--50 to 100 cm (moderately deep) to lithic contact (tuff); average of 18 to 27 percent clay in particle-size control section
Nevtah--100 to 150 cm (deep) to lithic contact between (tuff)
Pelican--90 to 125 cm (moderately deep, deep) to densic contact (till); mollic epipedon 25 to 65 cm thick
Wellscreek--no lithic contact within a depth of more than 150 cm; channers; dry 60 to 75 consecutive days in summer; forested

GEOGRAPHIC SETTING:
Elevation--940 to 2160 m
Climate--cold, wet winters; warm, dry summers
Mean annual precipitation--420 to 1460 mm
Mean annual air temperature--3 to 7 degrees C
Frost-free period--35 to 130 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Anatone--on plateaus, ridgetops, and south- and west-facing slopes; 25 to 50 cm (shallow) to lithic contact (basalt, andesite, welded tuff); no argillic horizon; skeletal particle-size control section; minor ash influence; under sagebrush, Idaho fescue, and bluebunch wheatgrass
Bocker--on shoulders and plateau summits; 10 to 25 cm (very shallow) to lithic contact (basalt); no argillic horizon; minor ash influence; under sagebrush, Idaho fescue, and bluebunch wheatgrass
Fivebit--on plateaus and backslopes; 25 to 50 cm (shallow) to lithic contact (rhyolitic tuff, andesite, basalt); minor influence of volcanic ash in loamy-skeletal colluvium; under scattered ponderosa pine, Douglas-fir, or western juniper and an understory of big sagebrush and Idaho fescue
Klicker--on backslopes; 50 to 100 cm (moderately deep) to lithic contact (basalt); mollic epipedon; no argillic horizon; minor ash influence; under Douglas-fir or ponderosa pine forest
Melhorn--on backslopes and footslopes; no lithic contact within a depth of more than 150 cm; mixed ash mantle; under Douglas-fir, ponderosa pine, or grand fir forest
Needhill--on mounds of basalt plateaus; 100 to 150 cm (deep) to lithic contact (basalt); mollic epipedon 50 to 90 cm thick; buried argillic horizon; under Idaho fescue, bluebunch wheatgrass, and Wyeth buckwheat
Troutmeadows--in pockets of closed canopy forests in high-elevation meadows; 50 to 100 cm (moderately deep) to lithic contact (basalt); thick volcanic ash mantle over loamy-skeletal colluvium; under subalpine fir, Engelmann spruce, grouse huckleberry, and pinegrass

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

USE AND VEGETATION:
Use--watershed, wildlife habitat, livestock grazing, recreation
Potential native vegetation--mountain big sagebrush, California brome, mountain snowberry, Kentucky bluegrass, antelope bitterbrush, bluebunch wheatgrass, Idaho fescue, Wyeth buckwheat, prairie Junegrass, groundsel, common yarrow, aster, sticky geranium, mint, penstemon, silky lupine, arrowleaf balsamroot, tailcup lupine

DISTRIBUTION AND EXTENT: Blue Mountains and foothills in northeastern Oregon; MLRA 10; 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 23 cm
*Cambic horizon--zone from 48 to 74 cm
*Volcanic glass--zone from the surface to a depth of 23 cm
*Particle-size control section--zone from 25 to 74 cm

ADDITIONAL DATA:
Laboratory data--pedon ID 95OR001008, sampled as McCarty series; National Soil Survey Laboratory, Lincoln, NE

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National Cooperative Soil Survey
U.S.A.