LOCATION FRINT WAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive, frigid Vitrandic Haploxerolls
TYPICAL PEDON: Frint gravelly ashy silt loam- rangeland, on a 53 percent north-facing slope at 3,500 feet elevation. (Colors are for dry soil unless otherwise stated. All textures are apparent field textures.)
A1--0 to 3 inches; dark grayish brown (10YR 4/2) gravelly ashy silt loam, black (10YR 2/1) moist; weak fine granular structure; loose, very friable, nonsticky and nonplastic; many very fine roots; common very fine irregular pores; 15 percent gravel and 5 percent stones; neutral (pH 7.2); abrupt smooth boundary. (4 to 7 inches thick)
A2--3 to 8 inches; dark grayish brown (10YR 4/2) gravelly ashy silt loam, black (10YR 2/1) moist; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; many very fine roots; common very fine irregular pores; 25 percent gravel; neutral (pH 7.2); clear smooth boundary. (4 to 7 inches thick)
AB--8 to 12 inches; brown (10YR 4/3) gravelly ashy silt loam, very dark brown (10YR 2/2) moist; weak fine and medium subangular blocky structure; soft, very friable, nonsticky and nonplastic; common very fine roots; many very fine tubular pores; 25 percent gravel; neutral (pH 7.2); abrupt wavy boundary. (3 to 6 inches thick)
2Bw1--12 to 17 inches; dark yellowish brown (10YR 4/4) very gravelly loam, dark brown (10YR 3/3) moist; moderate fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; many very fine tubular pores; 40 percent gravel; neutral (pH 7.2); clear wavy boundary.
2Bw2--17 to 20 inches; brown (10YR 5/3) very gravelly loam, dark brown (10YR 3/3) moist; moderate fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; many very fine tubular pores; 50 percent gravel and 5 percent cobbles; slightly alkaline (pH 7.6); clear wavy boundary.
2Bw3--20 to 24 inches; brown (10YR 5/3) extremely gravelly loam, dark brown (10YR 3/3), moist; weak fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; many very fine irregular pores; 40 percent gravel and 35 percent cobbles; slightly alkaline (pH 7.6); clear wavy boundary.
2Bw4--24 to 28 inches; yellowish brown (10YR 5/4) extremely gravelly loam, dark yellowish brown (10YR 3/4) moist; weak fine subangular blocky structure; hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine irregular pores; 40 percent gravel and 35 percent cobbles; slightly alkaline (pH 7.6) abrupt irregular boundary. (Combined thickness of the 2Bw horizon is 12 to 23 inches)
3R--28 inches; basalt bedrock.
TYPE LOCATION: Yakima County, Washington, about 2,640 feet west and 2,000 feet south of the northeast corner of section 30, T. 14 N., R. 22 E.; USGS Black Rock Spring NE topographic quadrangle; Lat. 46 degrees 40 min 24 sec N, Long. 120 degrees 06 min 58 sec W.
RANGE IN CHARACTERISTICS: The mean annual soil temperature is 44 to 47 degrees F. These soils are usually moist, but dry in all parts of the moisture control section for 75 to 90 consecutive days following the summer solstice. Thickness of the mollic epipedon is 20 to 24 inches. The upper 7 to 14 inches has an estimated bulk density of 1.10 to 1.20 g/cc, volcanic glass content of 5 to 20 percent, acid oxalate extractable aluminum plus one-half of the extractable iron of 0.4 to 0.7 percent, and 15 bar water retention of 5 to 10 percent for air dried samples. The particle-size control section averages 18 to 25 percent clay and 40 to 65 percent rock fragments. Solum thickness and depth to bedrock is 20 to 40 inches.
The A horizon has chroma of 1 or 2 moist.
The AB horizon has value of 4 or 5 dry and 2 or 3 moist.
The 2Bw horizon has value of 4 or 5 dry and chroma of 3 or 4 dry or moist. It is very gravelly loam and very gravelly silt loam in the upper part and extremely gravelly loam, extremely cobbly silt loam, very cobbly silt loam and extremely cobbly loam in the lower part. It is neutral or slightly alkaline.
COMPETING SERIES: These are the Bearspring, Dogtown, Hogranch, Mineral, Peahke, Pelican, Scoap, and Wellscreek series. Bearspring soils are very deep, have 7 to 15 percent clay and are dry for 60 to 75 days after the summer solstice. Dogtown soils are more than 40 inches to a lithic or paralithic contact and have mollic epipedons 10 to 20 inches thick. Hogranch soils are 40 to 60 inches to a lithic contact. Mineral soils have 7 to 12 percent clay in the particle-size control zone, are 20 to 40 inches to a sandy loam C horizon and are dry 60 to 75 consecutive days after the summer solstice. Peahke soils have 20 to 30 percent volcanic glass, mollic epipedons 10 to 20 inches thick and are dry 75 to 90 consecutive days after the summer solstice. Pelican soils are very deep. Scoap soils have moist bulk densities of 1.20 to 1.50 g/cc, 8 to 12 percent clay and are dry 60 to 75 consecutive days after the summer solstice. Wellscreek soils are more than 40 inches deep, have C horizons, and are dry 60 to 75 consecutive days after the summer solstice.
GEOGRAPHIC SETTING: Frint soils are on hillslopes and have slopes of 45 to 70 percent. These soils formed in colluvium from basalt and loess influenced by volcanic ash. Elevations are 3,100 to 4,200 feet. These soils are in a semiarid climate with warm dry summers and cold moist winters. The mean annual precipitation ranges from 12 to 15 inches. Average January temperature is about 24 degrees F., average July temperature is about 68 degrees F., and average annual temperature is 42 to 44 degrees F. Frost-free season is 90 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Hogranch and Gidwin soils. Hogranch soils are more than 40 inches deep. Gidwin soils are 12 to 20 inches to bedrock.
DRAINAGE AND PERMEABILITY: Well drained, very rapid runoff; moderate permeability.
USE AND VEGETATION: Rangeland and wildlife habitat. Native vegetation is Idaho fescue, bluebunch wheatgrass, cusick bluegrass, Sandburg bluegrass, and threetip sagebrush.
DISTRIBUTION AND EXTENT: Kittitas County, Washington. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Kittitas County, Washington, 1994
REMARKS: Diagnostic horizons and features recognized in this pedon are a mollic epipedon from the surface to 24 inches, a cambic horizon from 12 to 28 inches, and a lithic contact at 28 inches. The particle-size control section is the zone from 10 to 28 inches.