LOCATION LAMAY                   WA

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

LAMAY SERIES

Landscape--mountains
Landform--ridges, mountain slopes
Slope--0 to 60 percent
Parent material--volcanic ash mixed with residuum and colluvium derived from basalt
Mean annual precipitation--about 1000 mm
Mean annual air temperature--about 7 degrees C
Depth class--shallow
Drainage class--somewhat excessively drained
Soil moisture regime--xeric
Soil temperature regime--frigid
Soil moisture subclass--typic

TAXONOMIC CLASS: Ashy-skeletal, mixed, frigid Lithic Vitrixerands

TYPICAL PEDON: Lamay extremely cobbly ashy sandy loam in an area of rangeland, on a 35-percent, south-facing slope at an elevation of 1100 m (All textures are apparent field textures.)

A--0 to 5 cm; extremely cobbly ashy sandy loam, brown (10YR 5/3) dry, very dark grayish brown (10YR 3/2) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine and medium roots; few fine irregular pores; 30 percent gravel, 30 percent cobbles, and 15 percent stones; slightly acid (pH 6.5), NaF pH 9.5; clear smooth boundary

Bw--5 to 36 cm; extremely cobbly ashy sandy loam, yellowish brown (10YR 5/4) dry, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; soft, very friable, nonsticky and nonplastic; common fine and medium roots; common fine and few medium irregular pores; 30 percent gravel, 30 percent cobbles, and 15 percent stones; moderately acid (pH 6.0), NaF pH 9.3; gradual wavy boundary

2R--36 cm; basalt

TYPE LOCATION: Yakama Nation, Yakima County, Washington, about 10.5 km southwest of Signal Peak Ranger Station; about 880 m south and 370 m east of the northwest corner of section 1, T. 8 N., R. 12 E.; latitude 46.207201, longitude -121.255345, datum WGS 84 (coordinates estimated from section, township, and range)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature at lithic contact--7 to 8 degrees C
Soil moisture control section--usually moist, but dry in all parts 60 to 75 consecutive days following summer solstice
Depth to bedrock--25 to 50 cm
Rock fragment content in particle-size control section--45 to 85 percent

Andic soil properties
*Estimated bulk density--0.75 to 0.85 g/cm3
*Glass content--5 to 30 percent
*Acid oxalate aluminum plus one-half iron--2 to 3 percent
*15-bar water retention (air-dried samples)--5 to 12 percent

A horizon
Value--4 or 5 dry
Chroma--2 to 4 dry or moist
Thickness--5 to 23 cm

Bw horizon
Value--4 or 5 dry, 3 or 4 moist
Chroma--3 to 6 dry or moist
Texture of fine-earth fraction--ashy sandy loam, ashy fine sandy loam
Rock fragment content--45 to 85 percent
Thickness--13 to 45 cm

COMPETING SERIES: None

GEOGRAPHIC SETTING:
Elevation--1000 to 1525 cm
Climate--warm, dry summers; cool, most winters
Mean annual precipitation--890 to 1150 mm
Mean annual air temperature--6 to 7 degrees C
Frost-free period--95 to 130 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Nchitaak--on ridges and mountain side slopes; no lithic contact within a depth of more than 150 cm
Icksix--on mountain side slopes; no lithic contact within a depth of more than 150 cm
Nankwala--on mountain ridges and canyon side slopes; 50 to 100 cm (moderately deep) to a lithic contact (basalt)
Singh--on mountain benches and side slopes; no lithic contact within a depth of more than 150 cm; ashy over loamy-skeletal particle-size class

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

USE AND VEGETATION:
Use--dominantly livestock grazing and wildlife habitat
Vegetation--antelope bitterbrush, bluebunch wheatgrass, elk sedge

DISTRIBUTION AND EXTENT: Yakama Nation, Yakima County, south-central Washington; MLRA 6; small extent

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

SERIES ESTABLISHED: Yakama Nation, Yakima County, Washington; 2008

REMARKS:
Diagnostic horizons and other features recognized in this pedon
*Andic soil properties--zone from the surface to a depth of 36 cm
*Ochric epipedon
*Cambic horizon--zone from 5 to 36 cm
*Depth to lithic contact--36 cm
*Particle-size control section--zone from the surface to a depth of 36 cm

The Lamay series originally was named the Horselost series. Lamay means lost in Yakama. The hair of mountain goats is on the shrubs and low trees adjacent to the type location.

ADDITIONAL DATA:
Partial laboratory data--sample number 64A-1-1; Yakama Nation Soils Laboratory

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National Cooperative Soil Survey
U.S.A.