LOCATION EMMIOTT WAEstablished Series
TAXONOMIC CLASS: Medial, ferrihydritic, isomesic Eutric Pachic Fulvudands
TYPICAL PEDON: Emmiott medial silt loam - forested. (Colors are for moist soil unless otherwise noted. All textures are apparent field textures.)
Oe--0 to 1 inch; moderately decomposed needles, leaves, and twigs; abrupt smooth boundary. (1 to 3 inches thick)
A1--1 to 7 inches; very dark brown (10YR 2/2) medial silt loam, dark brown (10YR 3/3) dry; weak fine and very fine subangular blocky structure parting to granular; slightly hard, friable, slightly sticky, slightly plastic and weakly smeary; many very fine and fine, and common medium and coarse roots; many very fine and fine irregular and common very fine and fine tubular pores; moderately acid (pH 5.6); clear smooth boundary. (3 to 7 inches thick)
A2--7 to 12 inches; very dark brown (10YR 2/2) medial silt loam, brown (10YR 4/3) dry; weak very fine, fine and medium subangular blocky structure parting to granular; slightly hard, friable, slightly sticky and slightly plastic and weakly smeary; common very fine and fine, and few coarse and medium roots; many very fine and fine irregular and common very fine and fine tubular pores; moderately acid (pH 5.8); clear wavy boundary. (5 to 8 inches thick)
A3--12 to 22 inches; very dark brown (10YR 2/2) medial silt loam, brown (10YR 4/3) dry; weak very fine, fine and medium subangular blocky structure parting to granular; slightly hard, friable, slightly sticky and slightly plastic and weakly smeary; common very fine and fine roots; many very fine and fine irregular and common very fine and fine tubular pores; slightly acid (pH 6.2); clear wavy boundary. (0 to 10 inches thick)
Bw1--22 to 29 inches; very dark grayish brown (10YR 3/2) medial silt loam, dark yellowish brown (10YR 4/4) dry; weak fine, medium and coarse subangular blocky structure parting to granular; slightly hard, friable, slightly sticky and slightly plastic and weakly smeary; common very fine and fine roots; common very fine and fine irregular, and few very fine and fine tubular pores; slightly acid (pH 6.4); clear wavy boundary. (0 to 7 inches thick)
Bw2--29 to 41 inches; very dark grayish brown (10YR 3/2) medial silt loam, dark yellowish brown (10YR 4/4) dry; weak fine, medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic and weakly smeary; few very fine roots; common very fine and fine irregular, and few very fine and fine tubular pores; moderately acid (pH 6.0); clear wavy boundary. (8 to 12 inches thick)
Bw3--41 to 58 inches; dark brown (10YR 3/3) medial silt loam, yellowish brown (10YR 5/4) dry; weak fine, medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic and weakly smeary; few very fine roots; common very fine and fine irregular, and few very fine and fine tubular pores; moderately acid (pH 6.0); clear wavy boundary. (10 to 20 inches thick)
2Ab--58 to 60 inches; very dark brown (10YR 2/2) medial silt loam, dark brown (10YR 3/3) dry; moderate fine, medium and coarse subangular blocky structure; slightly hard, firm, slightly sticky, slightly plastic and weakly smeary; few very fine and fine irregular pores; strongly acid (pH 5.4).
TYPE LOCATION: Clallam County, Washington; about 2 miles south of Sappho; 1,500 feet south and 2,000 feet west of the northeast corner of sec. 5, T. 29 N., R. 12 W.; Latitude 48 degrees, 02 minutes, 45 seconds N.; and Longitude 124 degrees, 16 minutes, 22 seconds W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 52 degrees F. The difference between the mean summer and mean winter soil temperature is 5 to 9 degrees F. The soils are dry 30 to 45 consecutive days during the summer; udic soil moisture regime. The soil has andic soil properties throughout; phosphate retention is 85 to 100, acid oxalate aluminum plus one-half the acid oxalate iron is 2.0 to 4.0 percent, 15-bar water retention of 20 to 35 percent on air-dried samples and acid oxalate iron of 1.5 to 3.0 percent.
The A horizon has value of 2 or 3 moist, 3 to 5 dry, and chroma of 2 or 3 moist and dry. It has granular or subangular blocky structure. It is slightly acid to strongly acid. It has 7 to 20 percent organic matter with 10 to 20 percent in the upper 10 to 15 inches. It is 20 to 25 inches thick. It has 0.8 to 2.0 cmol/kg of aluminum.
The Bw horizon has value of 3 or 4 moist, 4 to 6 dry, and chroma of 2 to 4 moist, 3 or 4 dry. It is medial silt loam or medial loam. It has 3 to 8 percent organic matter.
The 2A horizon is at 40 to over 60 inches.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Emmiott soils are on glacial outwash plains at elevations from 500 to 800 feet. They formed in continental glacial outwash. These soils are in a mild marine climate and have cool, moist summers and cool, wet winters. Mean annual precipitation is 95 to 130 inches. Average January temperature is about 38 degrees F, average July temperature is about 59 degrees F, and mean annual temperature is about 47 degrees F. The frost-free season is 140 to 160 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Klahowya, Nanich, and Solduc soils. Klahowya soils are deep to dense till lack the thick A horizon (pachic feature) and have sandy loam textures with 25 to 35 percent rock fragments in the control section. Nanich and Solduc soils are sandy-skeletal and medial-skeletal respectively and are somewhat excessively drained.
DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderate permeability.
USE AND VEGETATION: Timber production is the principal use. Native vegetation is predominantly Sitka spruce, western hemlock, and vine maple. Understory species include western swordfern, deer fern, Oregon oxalis and false lily-of-the-valley.
DISTRIBUTION AND EXTENT: Western Clallam County, Washington; MLRA 1. Series is of minor extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Clallam County, Washington, 2000; Olympic National Forest.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Umbric epipedon from 1 to 60 inches; the zone from 1 to 22 inches is assumed to have a melanic index of over 1.70.
Andic soil properties from 1 to 60 inches.
All depths to diagnostic horizons and other features are measured from the top of the first mineral horizon.