LOCATION MACAFEE WAEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, isomesic, shallow Typic Duraquods
TYPICAL PEDON: Macafee silt loam. (Colors are for moist soil unless otherwise stated. All textures are apparent field textures.)
Oi--0 to 3 inches; slightly decomposed plant material; many fine and very fine roots throughout and few medium and coarse roots throughout; clear smooth boundary. (2 to 4 inches thick)
E1--3 to 8 inches; dark grayish brown (10YR 4/2) silt loam, grayish brown (10YR 5/2), dry; moderate fine subangular blocky structure; hard, firm, slightly sticky and slightly plastic; common fine and very fine roots throughout and few medium and coarse roots throughout; strongly acid (pH 5.2); gradual smooth boundary.
E2--8 to 12 inches; 75 percent dark grayish brown (10YR 4/2) silt loam, 90 percent grayish brown (10YR 5/2) and 10 percent light gray (10YR 7/1), dry; moderate medium subangular blocky structure parting to moderate fine subangular blocky structure; moderately hard, firm, slightly sticky and slightly plastic; few fine and very fine roots throughout; 5 percent reddish yellow (7.5YR 6/8), moist, concentrations and 20 percent gray (2.5Y 6/1), moist, depletions; strongly acid (pH 5.2); abrupt smooth boundary. (Combined thickness of the E horizon is 8 to 18 inches.)
Bsm--12 to 14 inches; 80 percent yellowish brown (10YR 5/6) and 20 percent yellowish red (5YR 4/6) cemented material, 80 percent pale yellow (2.5Y 7/4) and 20 percent yellowish red (5YR 5/8), dry; massive; strongly cemented by iron, organic matter and aluminum; moderately acid (pH 5.6); abrupt wavy boundary. (1 to 2 inches thick)
2Cd--14 to 24 inches; yellowish brown (10YR 5/6) extremely gravelly loam, pale yellow (2.5Y 8/4), dry; massive; hard, very firm, nonsticky and slightly plastic; 70 percent gravel, 2 percent cobbles; moderately acid, (pH 5.6).
TYPE LOCATION: Grays Harbor County, Washington; about 7 miles northeast of Taholah on the Quinault Indian Reservation; about 625 feet east and 1680 feet south of the northwest corner of section 14, T.22N., R.12W.; Latitude 47 degrees, 23 minutes, 57.3 seconds north and Longitude 124 degrees, 10 minutes, 52.8 seconds, west
RANGE IN CHARACTERISTICS: The soil is usually saturated above the Bsm horizon during the winter and spring. The mean annual soil temperature is 47 to 50 degrees F. The difference between mean summer and winter soil temperature is 5 to 9 degrees F. The soil has a aquic moisture regime; but has a short dry period of less than 30 days during the four-month period following the summer solstice. Depth to the cemented layer is 8 to 18 inches and depth to dense till is 10 to 20 inches from the mineral soil surface. The particle size control section averages 15 to 27 percent clay.
The E horizon has 10 to 20 percent organic matter. It has value of 5 or 7 dry, and chroma of 1 or 2 dry. Reaction is strongly acid.
The Bsm horizon is 1 to 2 inches thick and is strongly cemented by iron organic matter and aluminum. It has hue of 10YR to 5YR moist, and 5YR and 2.5Y dry, value of 4 or 5 moist and 5 or 7 dry, and chroma 6 moist, 4 through 8 dry. It has 1 to 5 percent organic matter. Reaction is moderately acid
The 2Cd horizon has hue of 10YR or 2.5Y, value of 5 moist and 8 dry, and chroma of 6 moist and 4 dry. It is extremely gravelly loam or extremely gravelly sandy loam. It has 8 to 22 percent clay and 0 to 3 percent organic matter. Reaction is moderately acid.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Macafee soils are on ground moraines on till plains at elevations of 60 to 630 feet. Slopes are 2 to 20 percent. These soils formed in alpine glacial till derived from sedimentary and metasedimentary rocks. The soils are in a mild marine climate and have cool, moist summers and cool, wet winters. The mean annual precipitation is 90 to 120 inches. The average January temperature is about 40 degrees F; the average July temperature is about 60 degrees F; and the mean annual temperature is about 49 degrees F. The frost free season is 180 to 220 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Aabab, Copalisrock, Kydaka, Moclips, and Papac soils. Aabab soils are greater than 60 inches to very gravelly outwash material. Copalisrock soils are very poorly drained, have a histic epipedon, and are 20 to 40 inches to dense till. Kydaka soils have a mucky surface horizon, and are 20 to 40 inches to dense till. Moclips soils have a placic horizon at a depth of 6 to 12 inches and lack the densic contact. Papac soils are moderately well drained and are 20 to 40 inches to dense till.
DRAINAGE AND PERMEABILITY: Poorly drained; moderate over very slow permeability. Macafee soils have a perched zone of saturation above the till from October through May.
USE AND VEGETATION: Principle uses are wildlife habitat, recreation, and timber production. The major tree species are western red cedar, lodgepole pine, and western hemlock. Understory species include salal, deerfern, blue huckleberry, and red huckleberry.
DISTRIBUTION AND EXTENT: West side of the Olympic Peninsula in western Washington; MLRA 4A. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Grays Harbor County, Washington, 2007 Quinault Indian Reservation.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Albic materials 3 to 12 inches
Spodic materials 12 to 14 inches
Densic contact 14 to 24 inches
Cemented material 12 to 14 inches
ADDITIONAL DATA: NSSL pedon characterization S04WA-027-003.