LOCATION TENERIFFE WAEstablished Series
TAXONOMIC CLASS: Sandy-skeletal, mixed, frigid Typic Haplorthods
TYPICAL PEDON: Teneriffe loamy sand - on a 60 percent convex south facing slope, under coniferous forest at 1,960 feet elevation. (Colors are for moist soil unless otherwise stated. All textures are apparent field textures.)
Oi--3 to 2 inches; mosses, needles, twigs. (1 to 2 inches thick)
Oa--2 inches to 0; decomposed forest litter. (1 to 2 inches thick)
E--0 to 1 inches; brown (7.5YR 4/2) loamy sand, (volcanic ash and pumice). pinkish gray (7.5YR 6/2) dry; weak very fine subangular blocky structure; soft, very friable, nonsticky, nonplastic; weakly smeary, many very fine and fine, common medium roots; 5 percent subangular pebbles; NaF pH less than 9.2; strongly acid (pH 5.4), abrupt smooth boundary. (1 to 2 inches thick)
Bhs--1 to 11 inches; dark brown (7.5YR 3/4) loamy sand, (volcanic ash and pumice), brown (7.5YR 5/4) dry; weak very fine subangular blocky structure; soft, very friable, slightly sticky, nonplastic; weakly smeary, many very fine and fine, common medium and coarse roots; 10 percent subangular pebbles; NaF pH 12.0+; medium acid (pH 5.6); gradual wavy boundary. (8 to 11 inches thick)
2Bs--11 to 21 inches; strong brown (7.5YR 4/6) gravelly loamy sand, reddish yellow (7.5YR 6/6) dry; weak very fine and fine subangular blocky structure; soft, very friable, slightly sticky, nonplastic; weakly smeary, many very fine, common fine and few medium roots; 20 percent subangular pebbles and 5 percent cobbles; NaF pH 11.5; medium acid (pH 5.6); clear wavy boundary (7 to 10 inches thick)
2BC1--21 to 26 inches; olive brown (2.5Y 4/4) very gravelly loamy sand, pale yellow (2.5Y 7/4) dry; weak very fine and fine subangular blocky structure; soft, very friable, nonsticky, nonplastic, weakly smeary; common very fine roots; 30 percent pebbles and 5 percent cobbles; NaF pH 11.0; medium acid (pH 5.8); clear wavy boundary. (5 to 15 inches thick)
2BC2--26 to 37 inches; light olive brown (2.5Y 5/4) very gravelly loamy sand, pale yellow (2.5Y 8/4) dry; weak fine and medium subangular blocky structure, soft, very friable, nonsticky, nonplastic, weakly smeary; common very fine and few coarse roots; 40 percent pebbles and 5 percent cobbles; NaF pH 10.5; medium acid (pH 5.8); clear wavy boundary. (8 to 11 inches thick)
2C--37 to 60 inches; light yellowish brown (10YR 6/4) very gravelly coarse sand, very pale brown (10YR 8/3) dry; massive; slightly hard, friable, nonsticky, nonplastic, nonsmeary; few very fine roots; 55 percent pebbles; (NaF pH 10.0) slightly acid (pH 6.2).
TYPE LOCATION: Snoqualmie Pass Area, King County, Washington; along Forest Service road No. 2218A; 1,200 feet west, 200 feet south of the northeast corner of sec. 7, T. 22 N., R. 10 E.
RANGE IN CHARACTERISTICS: Rock fragments, including hard cinders in the particle-size control section, average from 35 to 60 percent by volume. Mean annual soil temperature ranges from 44 to 46 degrees F.
The E horizon has hue of 5YR, 7. 5YR, or 10YR, value of 4 through 6 moist, 6 through 8 dry, and chroma of 1 or 2 moist or dry.
The Bhs horizon has hue of 5YR or 7.5YR, value of 3 through 5 moist, 5 through 7 dry, and chroma of 4 through 6 moist or dry. Rock fragments in the lower part range from 10 to 30 percent by volume. Reaction is strongly acid or medium acid.
The 2Bs horizon has value of 4 or 5 moist, 6 or 7 dry, and chroma of 4 through 6 moist or dry. Rock fragments range from 25 to 40 percent by volume. It is strongly acid or medium acid.
The 2BC horizon has hue of 10YR or 2.5Y, value of 4 through 6 moist, 7 or 8 dry, and chroma of 3 or 4 moist or dry. Rock fragments range from 35 to 60 percent by volume. It is slightly acid or medium acid.
The 2C horizon has hue of 10YR or 2.5Y, value of 5 or 6 moist, 6 through 8 dry, and chroma of 2 through 4 moist or dry. Textures are loamy sand, sand, or coarse sand modified by 50 to 70 percent rock fragments by volume. It is slightly acid or medium acid.
COMPETING SERIES; These are the Colton, Etach, Guardlake, Hermon, Limking, Marblemount, Masardis, Sheepscot, Skykomish, Stetson, and Waiska soils. Colton, Masardis, Stetson and Waiska soils are stratified in the lower part of the particle-size control section. In addition, Colton, Guardlake, Hermon, Masardis, Sheepscot, Stetson, and Waiska soils lack a volcanic ash mantle and are in a climate with cold winters and moist warm summers. Etach and Marblemount soils are 20 to 40 inches deep to a paralithic contact. Limking and Skykomish soils have a xeric moisture regime.
GEOGRAPHIC SETTING: Teneriffe soils are on mountain slopes at elevations of 1,600 to 2,800 feet. Slopes range from 8 to 65 percent. The Teneriffe soils formed in volcanic ash and pumice over residuum and colluvium from granitic and low grade metamorphic rocks. The climate is marine influenced with relatively cool, dry summers and cool, wet winters. Average annual precipitation ranges from 90 to 130 inches. The mean January temperature is about 30 degrees F; mean July temperature is about 60 degrees F; and the mean annual temperature is about 44 degrees F. The frost-free season is 130 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Blethen, Index, Klapatche, Philippa, Melakwa, Kaleetan, Kindy and the competing Marblemount soils. Blethen soils are mesic. Index, Kindy and Klapatche soils are cryic. Melakwa and Kaleetan soils are medial-skeletal. Philippa soils are moderately deep to a paralithic contact with compact glacial till.
DRAINAGE AND PERMEABILITY: Well drained, moderately rapid permeability, slow to medium runoff.
USE AND VEGETATION: Used for timber production, watershed, and wildlife habitat. Vegetation is western hemlock, Douglas-fir, red alder, bigleaf maple, and western redcedar with an understory of salal, Oregon-grape, western swordfern, red huckleberry, deer fern, western brackenfern, trailing blackberry, longtube twinflower, and queencup
beadlily.
DISTRIBUTION AND EXTENT: Western slopes of the Cascade Mountains, in west central Washington. Series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Snoqualmie Pass Area, King County, Washington, 1986.
REMARKS: Diagnostic horizons and features recognized in this pedon are an albic horizon from the mineral surface to 1 inch, a spodic horizon from 1 to 21 inches, and a volcanic ash mantle from the mineral surface to 11 inches.