LOCATION JIMMYCOMELATELY WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, isotic, mesic Aquultic Haploxeralfs
TYPICAL PEDON: Jimmycomelately very gravelly loam - forestland, on a 44 percent slope with a southerly aspect at an elevation of 1,875 feet in a western hemlock/salal-Oregon grape plant association. (When described on October 26, 1993, the soil was dry throughout. Colors are for dry soil unless otherwise stated.)
Oi--0 to 1 inch; slightly decomposed needles, leaves, and twigs; abrupt smooth boundary. (0.5 to 1.5 inches thick)
E--1 to 6 inches; pale brown (10YR 6/3) very gravelly loam, dark brown (10YR 3/3) moist; weak very fine and fine granular and weak very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and common fine, medium, and coarse roots; many very fine and fine tubular and irregular pores; 40 percent gravel; slightly acid (pH 6.4); clear smooth boundary. (4 to 7 inches thick)
E/Bt1--6 to 16 inches; 80 percent pale yellow (2.5Y 7/3) (E) and 20 percent light yellowish brown (10YR 6/4) (Bt) very gravelly loam; weak very fine, fine, and medium subangular blocky structure; slightly hard, friable, sticky and slightly plastic; common very fine, fine, medium, and coarse roots; common very fine and fine tubular and irregular pores; few faint clay films on faces of peds and lining pores; few fine distinct strong brown (7.5YR 5/6) irregularly shaped masses of iron accumulation with clear boundaries in the matrix; 40 percent gravel; moderately acid (pH 6.0); clear wavy boundary.
E/Bt2--16 to 23 inches; 65 percent light gray (2.5Y 7/2) very gravelly sandy clay loam (E) and 35 percent light yellowish brown (2.5Y 6/3) very gravelly sandy loam (Bt); weak very fine, fine, and medium subangular blocky structure; slightly hard, friable, sticky and slightly plastic; common very fine, fine, medium, and coarse roots; common very fine and fine tubular and irregular pores; few faint clay films on faces of peds and lining pores; few fine distinct reddish yellow (7.5YR 6/6) irregularly shaped masses of iron accumulation with clear boundaries in the matrix; 40 percent gravel, 5 percent cobbles; slightly acid (pH 6.2); clear wavy boundary. (Combined thickness of the E/Bt horizon is 12 to 21 inches.)
Bt/E1--23 to 30 inches; 60 percent yellowish brown (10YR 5/4) very gravelly clay loam (Bt) and 40 percent pale yellow (2.5Y 7/3) very gravelly clay loam (E); weak very fine, fine, and medium subangular blocky structure; slightly hard, friable, sticky and plastic; common very fine and few fine, medium, and coarse roots; common very fine and fine tubular and irregular pores; few distinct clay films on faces of peds and lining pores; few fine distinct reddish yellow (7.5YR 6/6) irregularly shaped masses of iron accumulation with clear boundaries in the matrix; 45 percent gravel, 5 percent cobbles; slightly acid (pH 6.4); clear wavy boundary.
Bt/E2--30 to 40 inches; 80 percent light yellowish brown (2.5Y 6/4) very gravelly clay loam (Bt) and 20 percent pale yellow (2.5Y 7/3) very gravelly clay loam (E); weak very fine, fine, and medium subangular blocky structure; hard, firm, sticky and plastic; few very fine and fine roots; few very fine and fine tubular and irregular pores; common distinct brown (7.5YR 4/4) clay films on faces of peds and lining pores; few fine distinct reddish yellow (7.5YR 6/6) irregularly shaped masses of iron accumulation with clear boundaries in the matrix; 40 percent gravel, 10 percent cobbles; slightly acid (pH 6.2); clear wavy boundary. (Combined thickness of the Bt/E horizon is 11 to 20 inches.)
Bt--40 to 61 inches; light olive brown (2.5Y 5/3) very gravelly sandy clay loam; moderate medium and coarse subangular blocky structure; hard, firm, sticky and plastic; few very fine, fine, medium, and coarse roots; few very fine and fine tubular and irregular pores; common distinct yellowish brown (10YR 5/4) clay films on faces of peds and lining pores; few fine distinct strong brown (7.5YR 5/6) irregularly shaped masses of iron accumulation with clear boundaries in the matrix; few fine distinct pale yellow (2.5Y 7/3) irregularly shaped iron depletions with clear boundaries in the matrix; 40 percent gravel, 10 percent cobbles; slightly acid (pH 6.4).
TYPE LOCATION: Clallam County, Washington, about 0.5 mile north of the Louella Guard Station, about 1,055 feet west and 0 feet south of the northeast corner of Section 20, T. 29 N., R. 3 W. (Latitude 48 degrees, 00 minutes, 00 seconds N., Longitude 123 degrees, 05 minutes, 04 seconds W.)
RANGE IN CHARACTERISTICS: Mean annual soil temperature is 52 to 55 degrees F. These soils are usually dry in all parts of the soil moisture control section for 45 to 60 consecutive days in the 4 months following the summer solstice. The particle-size control section has 35 to 75 percent rock fragments by volume. Depth to redox features having chroma of 2 or less is 10 to 20 inches. Depth to the glossic horizon is 4 to 7 inches.
The E horizon has hue of 10YR or 2.5Y moist, value of 3 or 4 moist and 6 or 7 dry, and chroma of 2 or 3 dry. It has 10 to 18 percent clay.
The E/Bt horizon for the E portion has hue of 2.5Y or 10YR dry and chroma of 2 or 3 dry. The Bt portion has hue of 10YR or 2.5Y dry and moist, value of 5 or 6 dry and 3 or 4 moist, and chroma of 3 or 4 dry and moist. It is very gravelly loam, very gravelly sandy clay loam, or extremely gravelly sandy clay loam. Reaction is moderately or slightly acid. It has 18 to 30 percent clay.
The Bt/E horizon for the Bt portion has hue of 10YR or 2.5Y dry or moist, value of 5 or 6 dry and 3 or 4 moist, and chroma of 3 or 4 moist. The E portion has chroma of 3 or 4 moist. It is very gravelly clay loam, extremely gravelly clay loam, or very gravelly sandy clay loam. It has 27 to 35 percent clay.
The Bt horizon has value of 5 or 6 dry and 3 or 4 moist and chroma of 3 or 4 dry and moist. It is very gravelly sandy clay loam, extremely gravelly clay loam, and very gravelly clay loam. It has 25 to 35 percent clay.
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: Jimmycomelately soils are on low relief, dissected uplands and have slopes of 30 to 60 percent. The soils formed in residuum and colluvium from proglacial lake deposits and continental glacial till. Elevations are 600 to 2,100 feet. Average annual precipitation ranges from 30 to 40 inches. Average annual temperature is 50 to 53 degrees F. The frost-free season is 180 to 200 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Grennan and Hardwick soils. Grennan and Hardwick soils are on low relief, dissected uplands. Grennan soils have a udic moisture regime. Hardwick soils are somewhat poorly drained and fine textured.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; moderately slow permeability. Jimmycomelately soils have an apparent water table in which the soil is saturated for very brief or brief periods following a storm event. Total cumulative saturation time of the soil is less than 30 days. The soils have an apparent zone of saturation between 1 and 3 feet from December through March.
USE AND VEGETATION: Timber production, wildlife habitat, recreation, and watershed. Native vegetation is Douglas-fir, western hemlock, western redcedar, grand fir, salal, creambush oceanspray, Oregon-grape, baldhip rose, red huckleberry, and Pacific rhododendron.
DISTRIBUTION AND EXTENT: Clallam County, Washington; MLRA 2. Series is of small 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 the following:
Ochric epipedon
Glossic horizon - 6 to 40 inches (E/Bt1, E/Bt2, Bt/E1, and Bt/E2 horizons)
Argillic horizon - 16 to 61 inches (E/Bt2, Bt/E1, Bt/E2, and Bt horizons)
PSCS - zone from 16 to 36 inches (E/Bt2, Bt/E1 and Bt/E2 horizons)
Aquultic subgroup - redox depletions with chroma of 2 or less at 16 inches or 15 inches from the mineral soil surface. Base saturation by sum of cations is assumed to be less than 75 percent in some part of the argillic horizon.
The soils formed in relic proglacial lake deposits in a wetter environment. The presence of the E horizon material and redox features in the upper horizons were not formed from present day pedogenesis.
All depths to diagnostic horizons and other features are measured from the top of the first mineral horizon.