LOCATION MOCLIPS WAEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, isomesic, shallow Placic Petraquepts
TYPICAL PEDON: Moclips mucky silt loam, forested. (Colors are for moist soil unless otherwise noted.)
Oi--0 to 2 inches; slightly decomposed needles and twigs; clear smooth boundary. (1 to 8 inches thick)
A1--2 to 4 inches; dark brown (7.5YR 3/2) mucky silt loam, brown (7.5YR 4/2) dry; moderate fine subangular blocky structure; hard, firm, moderately sticky and moderately plastic; many fine and medium roots throughout; common fine and medium irregular and few fine dendritic tubular pores; extremely acid (pH 4.4); clear smooth boundary.
A2--4 to 10 inches; dark brown (7.5YR 3/2) mucky silt loam, brown (7.5YR 4/2) dry; weak coarse subangular blocky structure; very hard, very firm, moderately sticky and very plastic; many fine and medium roots throughout; common fine and medium irregular and few fine dendritic tubular pores; extremely acid (pH 4.2); abrupt smooth boundary. (combined A horizon is 6 to 12 inches thick)
Bsm--10 to 12 inches; dark yellowish brown (10YR 4/4) cemented, material that crushes to silty clay loam, dark yellowish brown (10YR 4/6) dry; massive; very hard, extremely firm, moderately cemented by iron, moderately sticky and very plastic; few very fine roots throughout; common fine and medium irregular and few fine dendritic tubular pores; the upper 10 mm. is an indurated placic horizon cemented by iron, organic matter, and manganese; very strongly acid (pH 4.8); clear smooth boundary. (0.5 to 2 inches thick)
Bg1--12 to 24 inches; dark yellowish brown (10YR 4/4) silt loam, very pale brown (10YR 7/4) dry; massive; hard, firm, slightly sticky and moderately plastic; few very fine roots throughout; common fine and medium irregular and common fine dendritic tubular pores; common medium prominent irregular strong brown (7.5YR 5/6), moist, iron-manganese masses with clear boundaries in matrix and common coarse prominent irregular strong brown (7.5YR 5/6), moist, iron-manganese masses with clear boundaries in matrix; very strongly acid (pH 5.0); clear wavy boundary. ( 8 to 15 inches thick)
Bg2--24 to 37 inches; pale brown (10YR 6/3) silt loam, very pale brown (10YR 8/3) dry; massive; moderately hard, firm, slightly sticky and slightly plastic; few very fine roots throughout; common fine dendritic tubular common fine and medium irregular pores; common coarse prominent irregular strong brown (7.5YR 5/6), moist, iron-manganese masses with clear boundaries in matrix and common medium prominent irregular strong brown (7.5YR 5/6), moist, iron-manganese masses with clear boundaries in matrix; very strongly acid (pH 5.0); clear smooth boundary. ( 8 to 18 inches thick)
2Bsm--37 to 40 inches; yellowish brown (10YR 5/6), cemented material brownish yellow (10YR 6/6) dry; massive; extremely hard, slightly rigid, strongly cemented by iron; common coarse distinct strong brown (7.5YR 5/6), moist, iron-manganese masses with clear boundaries in matrix; neutral (pH 6.8); abrupt smooth boundary. ( 0 to 3 inches thick)
2Cg1--40 to 44 inches; light brownish gray (2.5Y 6/2) silty clay loam, light greenish gray (10Y 8/1) dry; massive; hard, firm, slightly sticky and slightly plastic; few fine faint irregular yellowish brown (10YR 5/6), dry, iron-manganese masses with diffuse boundaries in matrix; slightly acid (pH 6.4); abrupt smooth boundary. ( 0 to 12 inches thick)
2Cg2--44 to 48 inches; light brownish gray (2.5Y 6/2) fine sandy loam, light greenish gray (10Y 7/1) dry; massive; moderately hard, very friable, nonsticky and slightly plastic; many fine vesicular pores; few fine faint irregular yellowish brown (10YR 5/6), dry, iron-manganese masses with diffuse boundaries in matrix; neutral (pH 6.8); clear smooth boundary. ( 0 to 6 inches thick)
2Cg3--48 to 54 inches; light gray (2.5Y 7/2) silty clay loam, light greenish gray (10Y 8/1) dry; massive; hard, firm, slightly sticky and slightly plastic; few fine faint irregular yellowish brown (10YR 5/6), dry, iron-manganese masses with diffuse boundaries in matrix; moderately acid (pH 5.8); clear smooth boundary. ( 0 to 10 inches thick)
2Cg4--54 to 62 inches; grayish brown (2.5Y 5/2) loamy fine sand, light gray (2.5Y 7/2) dry; massive; loose, soft, nonsticky and nonplastic; many fine irregular pores; few fine faint irregular yellowish brown (10YR 5/6), dry, iron-manganese masses with diffuse boundaries in matrix; neutral, (pH 6.6); abrupt smooth boundary. ( 0 to 10 inches thick)
3Cg5--62 to 72 inches; grayish brown (2.5Y 5/2) very gravelly loamy fine sand, light gray (2.5Y 7/2) dry; massive; loose, soft, nonsticky and nonplastic; many fine irregular pores; common coarse distinct irregular strong brown (7.5YR 5/6), dry, iron- manganese masses with clear boundaries in matrix; 45 percent rounded gravel and 1 percent cobbles; slightly acid (pH 6.4).
TYPE LOCATION: Grays Harbor County, Washington; about 1/2 mile north of Moclips; 640 feet north and 2,050 feet east of the southwest corner of sec. 5, T. 20 N., R. 12 W.; Latitude 47 degrees, 14 minutes, 48 seconds North. and Longitude 124 degrees, 12 minutes, 21 seconds West.
RANGE IN CHARACTERISTICS: Depth to the placic horizon is 6 to 12 inches from the mineral soil surface. The mean annual soil temperature is 47 to 50 degrees F. The difference between the mean winter and mean summer soil temperature is 5 to 7 degrees F. The soil is saturated to the surface from March to May.
The A horizon has hue of 7.5YR or 10YR moist and dry, value of 3 or 4 moist and 4 or 5 dry, and chroma of 2 moist and 2 or 3 dry.It has 10 to 20 percent organic matter. It is mucky silt loam with 18 to 27 percent clay and 50 to 70 percent silt; field estimated.
The Bsm horizon has hue of 10YR or 7.5YR moist and dry, value of 3 or 4 moist and 4 through 6 dry, and chroma of 4 or 6 moist and dry. The upper 5 to 15 mm is a 7.5YR brown and black strongly cemented to indurated placic horizon.
The Bg horizon has hue of 10YR moist and dry, value of 4 or 6 moist and 7 or 8 dry, and chroma of 3 or 4 moist and dry. It is silt loam or silty clay loam. It has common to many redox concentrations.
The 2Cg horizon has hue of 2.5Y moist and 2.5Y or 10Y dry, value of 5 through 7 moist and 7 or 5 dry, and chroma of 2 moist and 1 through 2 dry. It is silty clay loam, fine sandy loam or loamy fine sand. It is moderately acid to neutral.
The 3Cg horizon has hue of 2.5Y moist and dry, value of 5 moist and 7 dry, and chroma of 2 moist and 4 dry. It is extremely gravelly loamy sand or very gravelly loamy fine sand. It has 40 to 70 percent coarse fragments, dominantly gravel.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: These soils occur at elevations of 50 to 740 feet on glacial outwash terraces. Slopes are 0 to 5 percent. The soils formed in silty glaciolacustrine deposits over glacial outwash. The climate is cool, wet winters and cool, moist summers. The mean 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 season is 180 to 220 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are Joecreek, Kydaka, Oyhut and Halbert soils. Joecreek soils are shallow to a cemented layer and are less than 25 inches to dense till. Kydata and Oyhut soils are moderately deep to cemented outwash. Halbert soils have a histic epipedon in addition to the placic horizon.
DRAINAGE AND PERMEABILITY: poorly drained; low 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, Sitka spruce, western red cedar, and western hemlock with and an understory of salal, salmonberry, deer fern, evergreen huckleberry, and red huckleberry.
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:
Umbric epipedon - 2 to 10 inches
Placic horizon - 5 to 15 mm thick continuous layer that is indurated within the Bsm.