LOCATION LYVILLE WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, mesic Ultic Haploxerolls
TYPICAL PEDON: Lyville very bouldery loam -forested on a 3 percent west-facing slope at an elevation of 2,100 feet. (Colors are for dry soil unless otherwise noted.)
Oi--0 to 1 inch; slightly decomposed needles, twigs, and leaves.
A1--1 to 4 inches; brown (7.5YR 5/4) very bouldery loam, dark reddish brown (5YR 3/2) moist; moderate very fine granular structure; soft, friable, slightly sticky and slightly plastic; common fine and very fine roots; common very fine irregular pores; 5 percent gravel, 5 percent cobbles and 5 percent boulders; neutral (pH 6.6); clear smooth boundary.
A2--4 to 8 inches; brown (7.5YR 5/4) very bouldery loam, dark reddish brown (5YR 3/3) moist; weak very fine granular structure; soft, friable, slightly sticky and slightly plastic; common fine and very fine roots; common very fine irregular pores; 10 percent gravel, 5 percent cobbles and 5 percent boulders; slightly acid (pH 6.4); clear smooth boundary. (Combined thickness of the A horizon is 5 to 12 inches)
AB--8 to 14 inches; brown (7.5YR 5/4) gravelly loam, dark reddish brown (5YR 3/3) moist; weak very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine and very fine roots; many very fine irregular and few fine and very fine tubular pores; 20 percent gravel; slightly acid (pH 6.2); clear smooth boundary. (5 to 8 inches thick)
Bw1--14 to 28 inches; brown (7.5YR 5/4) gravelly loam, dark reddish brown (5YR 3/4) moist; weak very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine, few medium and very fine roots; many very fine irregular and few very fine tubular pores; 30 percent gravel; slightly acid (pH 6.2); clear smooth boundary.
Bw2--28 to 45 inches; brown (7.5YR 5/4) very gravelly loam, dark reddish brown (5YR 3/4) moist; weak very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine roots; many very fine irregular pores; 50 percent gravel; moderately acid (pH 6.0); abrupt wavy boundary (Combined thickness of the Bw horizon is 27 to 37 inches)
R--45 inches; fractured basalt.
TYPE LOCATION: Klickitat County, Washington; about 4 miles north of Goldendale; 1,100 feet north and 1,300 feet west of the southeast corner of section 30, T. 5 N., R. 16 E. Latitude 45 degrees, 53 minutes, 12 seconds N. and Longitude 120 degrees, 50 minutes, 50 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 75 to 90 consecutive days within the four months that follow the summer solstice in 6 or more years out of 10. The solum is 40 to 60 inches and is the same as the depth to bedrock. The mollic epipedon is 10 to 20 inches thick. The particle-size control section is 18 to 25 percent clay and 15 to 35 percent rock fragments in the upper part and 45 to 60 percent in the lower part. The weighted average content of rock fragments is 35 to 45 percent in the particle-size control section.
The A horizon has hue of 5YR through 10YR value of 4 or 5 dry, 2 or 3 moist, and chroma of 1 through 4 dry, 2 or 3 moist. Reaction is slightly acid or neutral.
The Bw horizon has hue of 5YR through 10YR, value of 5 or 6 dry, 3 or 4 moist, and chroma of 2 or 4 dry and moist. Reaction is moderately acid or slightly acid.
COMPETING SERIES: These are the Bald, Briedwell, Fivelakes, Huston, Mowako, Rockford, Spokel and Suta series.
Bald soils - 20 to 40 inches to a lithic contact (basalt); dry for 45 to 60 consecutive days following the summer solstice
Briedwell soils - greater than 60 inches to bedrock; dry for 45 to 60 consecutive days following the summer solstice; mean annual soil temperature of 52 to 55 degrees F.; particle-size control section dominated by 35 to 60 percent rounded and subrounded rock fragments
Fivelakes soils - greater than 60 inches to bedrock; dry for 90 to 105 consecutive days following the summer solstice; 5 to 20 percent volcanic glass in the upper 7 to 14 inches
Huston soils - greater than 60 inches to bedrock; particle-size control section has 7 to 18 percent clay and 35 to 60 percent rounded and subrounded rock fragments
Mowako soils - 20 to 40 inches to a paralithic contact (sedimentary); dry for 45 to 60 consecutive days following the summer solstice
Rockford soils - greater than 60 inches to bedrock; solum thickness and depth to a very hard and firm 2C horizon is 18 to 38 inches
Spokel soils - greater than 60 inches to bedrock; dry for 45 to 60 consecutive days following the summer solstice
Suta soils - dry for 60 to 75 consecutive days following the summer solstice
A similar classification except for being a Typic subgroup, is the Wynhoff series.
Wynhoff soils - 20 to 40 inches to bedrock(rhyodacite porphyry); dry for more than 105 consecutive days.
GEOGRAPHIC SETTING: Lyville soils are on benches and canyon side slopes at elevations of 1,200 to 3,800 feet. Slopes are 2 to 65 percent. Lyville soils formed in colluvium derived from basalt mixed with loess. Summers are warm and dry; winters are cool and moist. The mean annual precipitation is 15 to 25 inches. The average January temperature is 28 degrees F. and the average July temperature is 66 degrees F. The mean annual temperature is 46 to 48 degrees F. The frost-free season is 80to 140 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Goldendale, Nook, Maydol, and the competing Suta soils. Goldendale, Nook and Maydol soils are fine-loamy. Goldendale soils are located on hillslopes and plateaus. Nook soils are on alluvial fans and low terraces. Maydol soils are on plateaus. Suta soils are on canyon side slopes.
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability.
USE AND VEGETATION: These soils are used for limited timber production, livestock grazing, homesites, and wildlife habitat. Vegetation is mainly scattered ponderosa pine and Oregon white oak with an understory of elk sedge, antelope bitterbrush, common snowberry, snowbrush ceanothus, Idaho fescue and squawcarpet.
DISTRIBUTION AND EXTENT: East slopes of the Cascade Mountains in southern Washington; MLRA 6. The series is of small extent.
MLRA OFFICE RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Klickitat County, Washington, 2003.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Mollic epipedon - the zone from 1 to 14 inches
Cambic horizon - the zone from 14 to 45 inches
Lithic contact - the zone beginning at 45 inches
Particle-size control section - the zone from 11 to 41 inches with a weighted average of 37 percent rock fragments.