LOCATION EAGREEK WAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Typic Dystroxerepts
TYPICAL PEDON: Eagreek paragravelly loam- forested, on a 40 percent northwest-facing slope at an elevation of 2,050 feet. (Colors are for dry soil unless otherwise noted. All textures are apparent field textures.)
Oi--0 to 1 inches; undecomposed forest litter of needles, leaves and twigs.
Oe--1 to 2 inches; moderately decomposed organic material.
A--2 to 8 inches; pinkish gray (7.5YR 6/2) paragravelly loam, dark brown 7.5YR 3/2) moist; moderate medium granular structure; soft, very friable, nonsticky and nonplastic; many very fine and fine, and common medium roots; many medium and coarse irregular pores; 30 percent paragravel (2 to 5 mm in size), and5 percent cobbles; neutral (pH 6.6); clear smooth boundary. (4 to 6 inches thick)
AB--8 to 21 inches; light reddish brown (5YR 6/3) paragravelly loam, dark reddish brown (5YR 3/4) moist; weak fine subangular blocky structure; soft, friable, nonsticky and nonplastic; many very fine and fine, and common medium and course roots; many medium irregular pores; 25 percent paragravel (2 to 5 mm in size) and 5 percent cobbles; slightly acid (pH 6.4); gradual wavy boundary. (10 to 14 inches thick)
Bw1--21 to 46 inches; pale red (10R 6/2) very paragravelly loam, reddish brown (2.5YR 4/4) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; common fine and medium, few coarse roots; common fine and medium irregular and common fine tubular pores; 45 percent breccia paragravel; moderately acid (pH 5.6); gradual wavy boundary. (15 to 25 inches thick)
Bw2--46 to 62 inches; pale red (10R 6/2) very paragravelly loam, reddish brown (2.5YR 4/4) moist; weak fine subangular blocky structure; slightly hard, friable, nonsticky and nonplastic; few fine roots; few fine tubular pores; 60 percent breccia paragravel; strongly acid (pH 5.2).
TYPE LOCATION: Klickitat County, Washington; 2 miles west of Snowden, about 1,000 feet north and 2,600 feet west of the southeast corner of section 14, T.4N, R.11E. (Latitude 45 degrees, 49 minutes, 57 seconds N. and Longitude 121 degrees, 23 minutes, 24 seconds W.)
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 47 to 50 degrees F. The soil moisture control section is dry in all parts for 65 to 75 consecutive days following summer solstice. The control section has 30 to 75 percent tuff, breccia or dacite paragravel. Base saturation is less than 60 percent between depths of 25 and 75 cm. Clay content in the control section ranges from 18 to 27 percent.
The A horizon has hue of 5YR or 7.5YR, value of 5 or 6 dry, 3 or 4 moist and chroma of 2 to 4 dry or moist. Paragravel (2 to 5 mm size) range from 15 to 30 percent and decrease in abundance with depth. It has 0 to 10 percent gravel and 0 to 5 percent cobbles. Reaction is neutral or slightly acid.
The Bw horizon has hue of 10R or 2.5YR, value of 5 to 7 dry, and 4 or 6 moist. Texture is very paragravelly loam or extremely paragravelly loam. It has 30 to 75 percent paragravel, 0 to 10 percent gravel and 0 to 3 percent cobbles. Reaction is moderately acid or strongly acid.
COMPETING SERIES: These are the
Colestine,
Holkat (T),
Hugo,
Hurlbut and
Littlesand series.
Colestine soils 20 to 40 inches to lithic contact (metamorphic); pscs has 15 to 30 percent gravel of metamorphic origin and lacks parafragments
Holkat soils 20 to 40 inches to paralithic contact (metasedimentary); dry for 90 to 100 consecutive days following the summer solstice
Hugo soils 40 to 60 inches to paralithic contact (sandstone graywacke); dry for 90 to 100 consecutive days following the summer solstice; mean annual soil temperature of 50 to 56 degrees F.
Hurlbut soils 20 to 40 inches to paralithic contact (metamorphosed sediments); dry for greater than 100 consecutive days following the summer solstice
Littlesand soils 20 to 40 inches to paralithic contact (sandstone); dry for 45 to 60 consecutive days following the summer solstice; mean annual soil temperature of 50 to 55 degrees F.
GEOGRAPHIC SETTING: Eagreek soils are on dissected plateaus at elevations of 1,800 to 2,100 feet. These soils formed in colluvium and residuum derived from tuff, volcanic breccia and dacite. Slopes are 15 to 50 percent. Summers are warm and dry and winters are cool and wet. The mean annual precipitation is 42 to 47 inches. The average January temperature is 29 degrees F. and the average July temperature is 65 degrees F. The mean annual temperature is 46 to 48 degrees F. The frost-free season is 100 to 130 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the McGowan, Tigit, and Underwood soils. These soils are on plateaus and all have argillic horizons.
DRAINAGE AND PERMEABILITY: Well drained; very rapid runoff; moderate permeability.
USE AND VEGETATION: These soils are used mainly for timber production, livestock grazing and wildlife habitat. Native vegetation is mainly Douglas-fir and grand fir with an understory of vine maple, dwarf rose, common snowberry, Cascade oregongrape, Virginia strawberry, willow, western hazel, and American trailplant.
DISTRIBUTION AND EXTENT: Klickitat County, Washington; MLRA 6. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Klickitat County, Washington, 2003. Name is from geologic formation in Klickitat County.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from 2 to 8 inches
Cambic horizon - the zone from 21 to 62 inches
Particle size control section - the zone from 12 to 42 inches (part of the AB and part of the Bw1 horizons).
Depth to diagnostic horizons and features are measured from the top of the first mineral layer.