LOCATION OGARTY WAEstablished Series
TAXONOMIC CLASS: Medial-skeletal, mixed, mesic Typic Vitrixerands
TYPICAL PEDON: Ogarty very gravelly loam, forested. (Colors are for moist soil unless otherwise stated. All textures are apparent field textures.)
0i--1 1/2 to 1/2 inch; forest litter.
0a--1/2 inch to 0; decomposed litter.
A--0 to 1 inch; very dark gray (10YR 3/1) very gravelly loam, gray (10YR 5/1) dry; moderate medium granular structure; soft, very friable, nonsticky, nonplastic, weakly smeary; common very fine, fine, medium and coarse roots; many very fine discontinuous pores; 15 percent cobbles, 40 percent fine pebbles; very strongly acid (pH 4.6); abrupt wavy boundary. (1/2 to 4 inches thick)
Bs1--1 to 10 inches; dark brown (7.5YR 4/4) very gravelly loam, yellowish brown (10YR 5/4) dry; weak very fine subangular blocky structure; soft, very friable, nonsticky, nonplastic, weakly smeary; common very fine, fine, medium and coarse roots; many very fine discontinuous pores; 10 percent cobbles, 45 percent pebbles, and 10 percent shot 2 mm to 5 mm in size; moderately acid (pH 6.0); clear broken boundary. (4 to 10 inches thick)
Bs2--10 to 20 inches ; brown (7.5YR 4/4) extremely gravelly loam, light yellowish brown (10YR 6/4) dry; moderate and weak medium subangular blocky structure; soft, very friable, slightly sticky, nonplastic, weakly smeary; common very fine, fine, medium and coarse roots; many very fine discontinuous pores; 10 percent cobbles, 60 percent fine angular pebbles, 10 percent shot 2 mm to 5 mm in size; moderately acid (pH 5.6); gradual wavy boundary. (4 to 12 inches thick)
Bs3--20 to 32 inches; brown (7.5YR 5/4) extremely gravelly loam, light yellowish brown (10YR 6/4); weak fine granular structure; soft, very friable, slightly sticky, slightly plastic, weakly smeary; common very fine, fine, medium and coarse roots; common very fine discontinuous pores; 75 percent fine angular pebbles, 5 percent shot 2mm to 5mm in size; moderately acid (pH 6.0); clear wavy boundary. (4 to 14 inches thick)
Bs4--32 to 35 inches; brown (7.5YR 4/4) extremely gravelly loam, yellowish brown (10YR 5/6) dry; massive; soft, very friable, slightly sticky, slightly plastic, weakly smeary; common very fine, fine, few medium and coarse roots; few pores; 70 percent fine angular pebbles; moderately acid (pH 6.0); clear broken boundary. (2 to 8 inches thick)
BC--35 to 38 inches; yellowish red (5YR 4/6) extremely gravelly loam, yellowish brown (10YR 5/6) dry; massive; soft, very friable, slightly sticky, slightly plastic, weakly smeary; few very fine, fine, medium and coarse roots; few pores; 90 percent angular pebbles; moderately acid (pH 6.0); abrupt smooth boundary. (0 to 4 inches thick)
2R--38 inches; hard andesite.
TYPE LOCATION: Snohomish County, Washington; 1,800 feet east and 2,100 feet north of southwest corner of section 3, T.28N., R.7E.
RANGE IN CHARACTERISTICS: The mean annual soil temperature ranges from 47 to 50 degrees F. The soils range from moderately acid to very strongly acid in the control section. Depth to bedrock ranges from 20 to 40 inches.
The A horizon has hue of 7.5YR or 10YR, value of 2 or 3 moist, 4 or 5 dry, and chroma of 1, 2 or 3 moist or dry. Some pedons have a discontinuous E horizon.
The Bs horizon has hue of 5YR, 7.5YR or 10YR, value of 4 or 5 moist, 5 or 6 dry, and chroma of 4 through 6 moist or dry. It is very gravelly or extremely gravelly loam or fine sandy loam.
COMPETING SERIES: These are the Ahl, Barnhardt, Beausite, Blethen, Heisler, Kanasket, Pickett, Squires, Tunnel, and Vanzandt series. Ahl soils are slightly acid in the BC and C horizon. Barnhardt, Blethen, Heisler, Kanasket, and Tunnel soils are more than 40 inches deep. Beausite soils have textures of sandy loam or coarser in the particle- size control section. Pickett soils are dry for 75 to 90 days. Squires soils have more than 35 percent phyllite rock fragments. Vanzandt soils have a paralithic contact with dense glacial till at 20 to 40 inches.
GEOGRAPHIC SETTING: These soils are on foothills at elevations of 200 to 1,200 feet. Slopes are 2 to 60 percent. The soils formed in volcanic ash and andesite residuum and colluvium. The average annual precipitation is 50 to 70 inches. The mean January temperature is 33 degrees F.; the mean July temperature is 59 degrees F.; and the mean annual temperature is 46 degrees F. The growing (28 degrees F) season is 140 to 200 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Nargar, Pastik, Ragnar, Tokul, and Winston soils. None of these soils has a lithic contact within a depth of 40 inches. Also, Pastik soils have less than 15 percent rock fragments in the control section. Ragnar soils are sandy. Tokul soils have an ortstein horizon. Winston soils are coarser loamy over sandy or sandy-skeletal.
DRAINAGE AND PERMEABILITY: Well drained; slow to medium runoff; moderate permeability.
USE AND VEGETATION: Ogarty soils are used primarily for timber production. Native vegetation is Douglas-fir, western hemlock, and western red-cedar, with an understory of western swordfern, vine maple, and salal.
DISTRIBUTION AND EXTENT: Northwestern Washington. This series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Snohomish County, Washington, 1979.
REMARKS: Classification only updated 3/94 because of recent amendments to Soil Taxonomy. Diagnostic horizons and features recognized in this pedon are an ochric epipedon from the mineral surface to 1 inch, a cambic horizon from 1 to 38 inches, and a lithic contact at 38 inches.