LOCATION HALLENTON WAEstablished Series
TAXONOMIC CLASS: Fine-loamy, isotic, nonacid, mesic Typic Endoaquepts
TYPICAL PEDON: Hallenton silt loam, on a 1 percent slope. (Colors are for dry/moist soil unless otherwise noted.)
A--0 to 11 inches; grayish brown (10YR 5/2) silt loam, light gray (10YR 7/2) dry; weak fine subangular blocky structure; slightly hard, friable, nonsticky, nonplastic; common very fine roots; few fine irregular pores; moderately acid (pH 5.8); clear smooth boundary. (9 to 12 inches thick)
Bg--11 to 19 inches; light brownish gray (2.5Y 6/2) silt loam, white (2.5Y 8.2) dry; few medium prominent mottles of yellowish brown (10YR 5/6), brownish yellow (10YR 6/6) dry; massive; slightly hard, friable, slightly sticky, slightly plastic; few fine and medium irregular pores; few very fine roots; strongly acid (pH 5.4); clear smooth boundary. (7 to 13 inches thick)
Cg--19 to 60 inches; olive gray (5Y 5/2) silt loam, white (5Y 8/2) dry; many coarse prominent mottles of yellowish brown (10YR 5/6), brownish yellow (10YR 6/6) dry; massive; very hard, firm, slightly sticky, plastic; strongly acid (pH 5.2).
TYPE LOCATION: Whatcom County, Washington; about 8 miles east of Blaine, 1,400 feet south and 1,500 feet east of the northwest corner, sec. 4, T. 40 N., R. 2 E.
RANGE IN CHARACTERISTICS: Mean annual soil temperature ranges from 50 to 54 degrees F. Thickness of the solum is 14 to 30 inches. The particle-size control section is 18 to 30 percent clay and 0 to 10 percent pebbles by weighted average, although individual horizons are 0 to 25 percent pebbles.
The A horizon has hue of 10YR or 2.5Y, value of 4 or 5 moist, 6 or 7 dry, and chroma of 2 or 3 moist and dry.
The Bg horizon has hue of 10YR or 2.5Y, value of 5 to 7 moist, 6 to 8 dry, and chroma of 2 or 3 moist and dry. It is silt loam or loam.
The Cg horizon has hue of 2.5Y, 5Y, or N/, value of 4 to 6 moist, 6 to 8 dry, and chroma of 2 or 3 moist and dry. It is loam, clay loam, silt loam, or silty clay loam.
COMPETING SERIES: This is the Vincennes series. Vincennes soils have a mean annual soil temperature of 54 to 59 degrees F, and a solum 42 to 60 inches thick.
GEOGRAPHIC SETTING: Hallenton soils are ponded depressions on glacialmarine drift plains at elevations of 200 to 300 feet. These soils formed in loess, volcanic ash, and glacialmarine drift. Hallenton soils have a marine climate with warm, dry summers and cool, moist winters. Snow cover is intermittent. Average annual precipitation is 30 to 50 inches, which falls mostly between October and May. Mean January temperature is 36 degrees F, mean July temperature is 62 degrees F, and the mean annual temperature is 50 degrees F. The frost-free season is 150 to 190 days.
GEOGRAPHICALLY ASSOCIATED SOILS; These are the Labounty and Whatcom soils. Labounty soils have an umbric epipedon. Whatcom soils have a spodic horizon and are moderately well drained.
DRAINAGE AND PERMEABILITY: Very poorly drained, slow runoff, slow permeability. The soil is ponded.
USE AND VEGETATION: Used for wildlife habitat. Common plants are Douglas spirea, cattail, skunkcabbage, and salmonberry.
DISTRIBUTION AND EXTENT: Northwestern Washington. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Whatcom County, Washington, 1986.
REMARKS: Diagnostic horizons and features recognized in this pedon are: an ochric epipedon from the surface to 11 inches; and a gleyed cambic horizon from 11 to 19 inches.