LOCATION JOECREEK WAEstablished Series
TAXONOMIC CLASS: Loamy, isotic, isomesic, shallow Typic Petraquepts
TYPICAL PEDON: Joecreek mucky silt loam, forested. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 2 inches; slightly decomposed accumulation of needles, twigs and mosses; clear smooth boundary.
Oa--2 to 5 inches; highly decomposed accumulation of needles and twigs; many fine and very fine roots and common medium, coarse and very coarse roots throughout; clear smooth boundary. (Combined O horizon is 1 to 8 inches thick)
E1--5 to 11 inches; very dark brown (10YR 2/2) mucky silt loam, gray (10YR 6/1) dry; weak fine, medium and coarse angular blocky structure; moderately hard, firm, slightly sticky and moderately plastic; many fine and very fine roots and common medium, coarse and very coarse roots throughout; many fine irregular and common very fine dendritic tubular pores; extremely acid (pH 3.8); clear smooth boundary.
E2--11 to 16 inches; very dark grayish brown (10YR 3/2) mucky silt loam, gray (10YR 6/1) dry; weak very fine, fine and medium angular blocky structure; hard, firm, slightly sticky and moderately plastic; common fine and very fine roots and few medium and coarse roots throughout; many fine irregular and few very fine dendritic tubular pores; extremely acid (pH 4.0); gradual wavy boundary. (combined E horizon is 8 to 12 inches thick)
Bw--16 to 23 inches; very dark grayish brown (10YR 3/2) very gravelly mucky silt loam, pale brown (10YR 6/3) dry; moderate very fine and fine angular blocky structure; moderately hard, firm, slightly sticky and moderately plastic; few fine and very fine roots throughout; common fine irregular and few very fine dendritic tubular pores; common coarse prominent brownish yellow (10YR 6/8) dry irregularly shaped masses of iron accumulation with clear boundaries in the matrix; 35 percent gravel, 2 percent cobbles; very strongly acid (pH 4.6); clear wavy boundary. (4 to 8 inches thick)
2Bsm--23 to 29 inches; brown (10YR 5/3) extremely gravelly clay loam, pale brown (10YR 6/3) dry; massive; very hard, extremely firm, moderately cemented by iron, slightly sticky and moderately plastic; few very fine roots throughout; common fine irregular pores; common fine and medium prominent brownish yellow (10YR 6/8) dry irregularly shaped masses of iron accumulation with clear boundaries in the matrix; 65 percent gravel, 2 percent cobbles; very strongly acid (pH 4.8); gradual wavy boundary. (4 to 8 inches thick)
2Cd1--29 to 38 inches; yellowish brown (10YR 5/4) extremely gravelly clay loam, light yellowish brown (10YR 6/4) dry; massive; hard, firm, slightly sticky and moderately plastic; few very fine roots throughout; many fine irregular pores; common medium distinct yellowish brown (10YR 5/6) dry irregularly shaped masses of iron accumulation with clear boundaries in the matrix; 65 percent gravel, 2 percent cobbles; moderately acid (pH 5.8); gradual wavy boundary. (7 to 10 inches thick)
2Cd2--38 to 60 inches; yellowish brown (10YR 5/6) extremely gravelly loam, brownish yellow (10YR 6/6) dry; massive; moderately hard, firm, nonsticky and nonplastic; many coarse prominent strong brown (7.5YR 5/8) dry irregularly shaped masses of iron accumulation with clear boundaries in the matrix; 65 percent gravel, 2 percent cobbles; moderately acid (pH 5.8).
TYPE LOCATION: Grays Harbor County, Washington; about 5 miles east of Moclips (Moclips Highway to Road F-1.1); 1,000 feet north and 1,200 feet west of the southeast corner of sec. 1, T. 20 N., R. 12 W.; Latitude 47 degrees, 14 minutes, 51 seconds North. and Longitude 124 degrees, 6 minutes. 58 seconds West.
RANGE IN CHARACTERISTICS: Depth to cemented material is 12 to 20 inches from the mineral surface and underlain by dense glacial till. The soil is saturated to the surface from January to May. The mean annual soil temperature is 47 to 50 degrees F. The difference between man summer and mean winter soil temperature is 5 to 7 degrees F. The particle-size control section averages 15 to 35 percent rock fragments. The particle-size control section has 18 to 27 percent clay and 50 to 70 percent silt.
The Oa horizon has hue of 10YR moist and dry, value of 2 moist and dry, and chroma of 1 moist and 1 or 2 dry.
The E horizon has hue of 10YR moist and dry, value of 2 or 3 moist and 6 dry, and chroma of 2 moist and 1 dry. It is extremely acid. It has 10 to 20 percent organic matter. It has 0 to 5 percent gravel.
The Bw horizon has hue of 10YR moist and dry, value of 3 moist and 6 dry, and chroma of 2 moist and 3 dry. It is very gravelly mucky silt loam or gravelly mucky silt loam. It is very strongly acid. It has 15 to 40 percent rock fragments dominantly gravel. It has 10 to 20 percent organic matter.
The 2Bsm horizon has hue of 10YR moist and dry, value of 5 moist and 6 dry, and chroma of 3 moist and dry. It is extremely gravelly clay loam. It is very strongly acid. It is moderately to very strongly cemented.
The 2Cd horizon has hue of 10YR moist and dry, value of 5 moist and 6 dry, and chroma of 4 or 6 moist and dry. It is extremely gravelly clay loam or extremely gravelly loam. Moist bulk density is 1.70 to 2.00 g/cc. It has 40 to 85 percent coarse fragments, dominantly gravel.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: These soils occur at elevations of 60 to 610 feet on glacial outwash terraces. Slopes are 0 to 5 percent. The soils formed in silty glaciolacustrine deposits over gravelly glacial outwash. The mean annual precipitation is 90 to 120 inches. The mean January temperature is about 38 degrees F.; the mean July temperature is about 63 degrees F. and the mean annual temperature is 47 to 50 degrees F. The frost-free period is 180 to 220 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Oyhut, Copalisrock and Kydaka soils. Copalisrock soils have a histic epipedon. Oyhut soils are moderately deep to cemented outwash over densic material. Kydaka soils are moderately deep to densic material.
DRAINAGE AND PERMEABILITY: Poorly drained; very slow runoff; moderately slow over very slow permeability.
USE AND VEGETATION: These soils are used for timber production and wildlife habitat. Vegetation is mainly shore pine, western hemlock, western red cedar, and Sitka spruce with an understory of deerfern, salal, salmonberry, Labrador tea, sedges and rushes.
DISTRIBUTION AND EXTENT: Western Washington; MLRA 4A. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Grays Harbor County, Washington; Quinault Indian Reservation; 2007.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Albic horizon from 5 to 16 inches.
Cambic horizon from 16 to 23 inches.
The particle-size control section (15 to 23 inches) averages 32 percent rock fragments.
Cemented material from 23 to 29 inches.
Densic contact at 29 to 60 inches.
The cemented layer is cemented by iron, manganese and organic matter. It does not qualify as a diagnostic horizon as presently defined in Soil Taxonomy. A change to Soil Taxonomy is needed to remove the diagnostic horizon terminology from the greatgroup criteria. The criteria should be similar to that as stated in Durudands and Durudepts; cemented horizon.
ADDITIONAL DATA: Reference sample 0 to 10 inches, 01WA-027-002, and 04WA-027-008.