LOCATION LINVILLE                WA+ID OR

Established Series
Rev. PNP/KDPL/SBC
09/2019

LINVILLE SERIES

Landscape-plateaus, canyonlands, hills
Landform--north- and east-facing hillslopes, ridges, canyon walls
Slope--0 to 90 percent
Parent material--slope alluvium and colluvium derived from basalt and loess with a minor amount of volcanic ash
Mean annual precipitation--about 430 mm
Mean annual air temperature--about 9 degrees C
Depth class--deep, very deep
Drainage class--well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Pachic Haploxerolls

TYPICAL PEDON: Linville silt loam in an area of rangeland

A1--0 to 30 cm; silt loam, very dark grayish brown (10YR 3/2) dry, very dark brown (10YR 2/2) moist; weak medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many roots; common very fine tubular pores; few angular basalt gravel-sized fragments and cobbles; neutral (pH 7.2); gradual wavy boundary

A2--30 to 64 cm; silt loam, dark grayish brown (10YR 4/2) dry, very dark brown (10YR 2/2) moist; weak medium prismatic structure; slightly hard, friable, slightly sticky and slightly plastic; many roots; few medium and common very fine tubular pores; few angular basalt gravel-sized fragments and cobbles; neutral (pH 7.2); clear wavy boundary

A3--64 to 75 cm; silt loam, dark grayish brown (10YR 4/2) dry, very dark grayish brown (10YR 3/2) moist; weak medium prismatic structure; slightly hard, friable, slightly sticky and slightly plastic; many roots; few coarse and medium and common very fine tubular pores; few angular basalt gravel-sized fragments and cobbles; slightly alkaline (pH 7.4); abrupt wavy boundary

Bw1--75 to 109 cm; cobbly silt loam, brown (10YR 5/3) dry, dark grayish brown (10YR 4/2) moist; moderate coarse prismatic structure; hard, friable, moderately sticky and moderately plastic; common roots; few very coarse and many medium and very fine tubular pores; thin patchy siliceous coatings on peds; 15 percent cobbles and 10 percent gravel; slightly alkaline (pH 7.5); gradual wavy boundary

Bw2--109 to 137 cm; cobbly silt loam, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; moderate medium prismatic structure; hard, friable, moderately sticky and moderately plastic; common roots; few very coarse and many medium and very fine tubular pores; thin patchy siliceous coatings on peds; 20 percent cobbles and 10 percent gravel; slightly alkaline (pH 7.7); gradual wavy boundary

BC--137 to 160 cm; cobbly silt loam, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; massive; hard, friable, moderately sticky and moderately plastic; common roots; few medium and many very fine tubular pores; 20 percent cobbles and 10 percent gravel; slightly alkaline (pH 7.8)

2R--160 cm; basalt

TYPE LOCATION: Garfield County, Washington; about 280 m west and 110 m south of the northeast corner of section 2, T. 13 N., R. 42 E.

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--8 to 10 degrees C
Soil moisture--usually moist, but dry in all parts 75 to 90 consecutive days between depths of 10 and 30 cm in summer and fall
Depth to basalt and thickness of solum--100 to 150 cm or more
Particle-size control section--averages 18 to 27 percent clay and 5 to 30 percent angular basalt fragments, by volume
Thickness of mollic epipedon--51 to 122 cm

A1 and A2 horizons
Hue--7.5YR, 10YR
Value--3 to 5 dry, 2 or 3 moist
Chroma--1 to 3 dry or moist
Thickness of A1 horizon--25 to 36 cm
Thickness of A2 horizon--25 to 36 cm

A3 horizon, and AB horizon (where present)
Value--3 or 4 dry, 2 or 3 moist
Chroma--2 or 3 dry or moist
Texture--silt loam, cobbly silt loam
Thickness of A3 horizon--10 to 20 cm

Bw horizon
Hue--7.5YR, 10YR
Value--4 to 6 dry, 2 to 4 moist
Chroma--2 to 4 dry or moist
Texture--silt loam, cobbly silt loam, very cobbly loam, gravelly silt loam
Reaction--6.6 to 8.4
Combined thickness--48 to 69 cm

A Bt horizon is in some pedons.

BC horizon
Value--4 to 6 dry, 3 or 4 moist
Chroma--3 or 4 dry
Texture--cobbly silt loam, very cobbly loam, cobbly loam
Reaction--7.4 to 8.4

COMPETING SERIES:
Alicel--no rock fragments in particle-size control section; clay loam or sandy clay loam in cambic horizon
Calimus, Chalkford, Sinamox--dry more than 90 consecutive days
Jamescanny--aridic soil moisture regime
Sweeney--fine sandy loam in lower part of particle-size control section; mean annual soil temperature of about 14 degrees C
Watama--50 to 100 cm (moderately deep) to a lithic contact (basalt)

GEOGRAPHIC SETTING:
Elevation--240 to 1075 m
Climate--warm, dry summers; cool, moist winters
Mean annual precipitation--360 to 460 mm
Mean January air temperature--about -2 to 0 degrees C
Mean July air temperature--20 to 22 degrees C
Mean annual air temperature--8 to 10 degrees C
Frost-free season--80 to 160 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Gwin, Kuhl, Laufer--25 to 50 cm (shallow) to a lithic contact (basalt)
Matheny--loamy-skeletal particle-size class
Rockly--10 to 30 cm (very shallow, shallow) to a lithic contact (basalt); loamy-skeletal particle-size class
Tucannon, Thiessen--50 to 100 cm (moderately deep) to a lithic contact (basalt)

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained
Saturated hydraulic conductivity (Ksat)--moderately high

USE AND VEGETATION:
Use--livestock grazing, wildlife habitat
Native vegetation--mainly Idaho fescue, bluebunch wheatgrass, rose, common snowberry, and hawthorn

DISTRIBUTION AND EXTENT: Eastern and central Washington, northeastern Oregon, Idaho; MLRAs 8 and 9; moderate extent

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

SERIES ESTABLISHED: Garfield County, Washington; 1970

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Mollic epipedon--at the surface to a depth of 75 cm
*Cambic horizon--75 to 137 cm

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National Cooperative Soil Survey
U.S.A.