LOCATION CODYLAKE WAEstablished Series
TAXONOMIC CLASS: Ashy over loamy, glassy over isotic Xeric Vitricryands
TYPICAL PEDON: Codylake ashy loam - forested, on a 12 percent southeast-facing slope at an elevation of 4,870 feet. (Colors are for dry soil unless otherwise noted. All textures are apparent field textures.)
Oi--0 to 1 inch; needles, twigs, and leaves.
A--1 to 6 inches; yellowish brown (10YR 5/4) ashy loam, brown (10YR 4/3) moist; weak very fine subangular blocky structure; soft, very friable, nonsticky, nonplastic and weakly smeary; many very fine and common fine and medium roots; 10 percent pebbles; neutral (pH 6.6); clear smooth boundary. (2 to 6 inches thick)
Bw1--6 to 14 inches; yellowish brown (10YR 5/4) ashy loam, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; soft, very friable, nonsticky, nonplastic and weakly smeary; common very fine, fine and few medium roots; 10 percent pebbles; moderately acid (pH 6.0); clear smooth boundary. (6 to 12 inches thick)
Bw2--14 to 25 inches; light yellowish brown (10YR 6/4) gravelly ashy fine sandy loam, dark yellowish brown (10YR 4/4) moist; weak fine subangular blocky structure; soft, very friable, nonsticky, nonplastic and weakly smeary; common very fine, fine, and few medium roots; 20 percent pebbles (2-10 mm in size); moderately acid (pH 6.0); clear smooth boundary. (6 to 11 inches thick)
2C--25 to 44 inches; light yellowish brown (10YR 6/4) gravelly sandy loam, yellowish brown (10YR 5/6) moist; massive; soft, very friable, nonsticky and nonplastic; few fine roots; 25 percent pebbles (2-10 mm in size); moderately acid (pH 5.8); gradual smooth boundary. (15 to 30 inches thick)
2Cr--44 inches; weathered granodiorite.
TYPE LOCATION: Colville Indian Reservation; Okanogan County, Washington; about 10 miles east of the community of Disautel; 1,650 feet west and 950 feet south of the northeast corner sec. 15, T. 33 N., R. 30 E., W.M.
RANGE IN CHARACTERISTICS: The mean annual soil temperature at a depth of 20 inches ranges from 41 to 43 degrees F. These soils are usually moist but are dry in all parts between a depth of 4 and 12 inches for 45 to 60 consecutive days following the summer solstice. The upper 14 to 24 inches of the 0 to 40 inch particle-size control section has an estimated moist bulk density of 0.65 to 0.85 g/cc, volcanic glass content of 30 to 60 percent, acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of 1.0 to 2.0 percent, and 15-bar water retention of 5 to 12 percent for air dried samples. The lower part of the particle-size control section has 3 to 8 percent clay and 10 to 35 percent roc fragments Depth to a paralithic contact with weathered bedrock is 40 to 60 inches. Reaction is moderately acid through neutral throughout.
The A horizon has hue of 10YR or 7.5YR, value of 5 or 6 dry, 3 or 4 moist, and chroma of 2 through 4 dry or moist.
The Bw1 and Bw2 horizons have hue of 10YR or 7.5YR, value of 5 or 6 dry, 3 or 4 moist and chroma of 2 through 4 dry or moist. They are ashy loam, ashy silt loam, gravelly ashy fine sandy loam, gravelly ashy sandy loam, or gravelly ashy loam. They have 0 to 20 percent pebbles.
The 2C horizon has hue of 10YR or 2.5Y, value of 4 through 6 moist, 6 through 8 dry, and chroma of 3 through 6 dry or moist. It is sandy loam, gravelly sandy loam or gravelly coarse sandy loam. It has 10 to 30 percent pebbles and 0 to 5 percent cobbles.
COMPETING SERIES: These are the Almac, Gahee, Helter, Nile and Shanahan series. The Almac, Gahee, Nile, and Shanahan soils are very deep. The Helter soils have 2Bw horizons.
GEOGRAPHIC SETTING: Codylake soils are on backslopes and ridges of mountains. These soils formed in volcanic ash over colluvium and residuum from quartz monzonite, granodiorite, or granitic rock. Slopes are 5 to 65 percent. Elevations range from 3,800 to 6,000 feet. The climate is characterized by cold, wet winters and cool, dry summers. Mean annual precipitation ranges from 20 to 30 inches, with snow pack from December to March. The mean January temperature is about 20 degrees F, mean July temperature is about 60 degrees F, and the mean annual air temperature is about 40 degrees F. The frost-free season is 80 to 100 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Buhrig, Centralpeak, Manley, Moscow, Ohscow, Moses, Resner, and Togo soils. Buhrig soils are 20 to 40 inches deep to a lithic contact, loamy-skeletal, and have a volcanic ash mantle 7 to 14 inches thick. Centralpeak, Moscow and Moses soils are 20 to 40 inches deep to a paralithic contact. In addition, Centralpeak and Moscow soils have a frigid temperature regime. Manley and Togo soils are loamy-skeletal in the lower part of the control section. Resner soils are sandy-skeletal in the lower part of the control section.
DRAINAGE AND PERMEABILITY: Well drained, slow to rapid runoff; moderately rapid permeability.
USE AND VEGETATION: Used for timber production, grazing, wildlife habitat, recreation, and watershed. Native vegetation includes subalpine fir, Douglas-fir, western larch, Engelmann spruce, lodgepole pine, black mountain huckleberry, pachystima, longtube twinflower, queencup beadlily, pinegrass, and kinnikinnick.
DISTRIBUTION AND EXTENT: Northeastern Washington. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Colville Indian Reservation, Okanogan County, Washington, 1984.
REMARKS: Diagnostic horizons and features recognized in this pedon are an ochric epipedon from the surface to 7 inches (mixed), a cambic horizon from 6 to 25 inches, and a 2C horizon composed of loamy material from 25 to 44 inches. This description reflects a change in classification from ashy over loamy, mixed Xeric Vitricryands to ashy over loamy, glassy over isotic Xeric Vitricryands.