LOCATION ANGLEN WAEstablished Series
TAXONOMIC CLASS: Fine, isotic, frigid Andic Palexeralfs
TYPICAL PEDON: Anglen ashy silt loam - forested. (Colors are for dry soils unless otherwise noted.)
0a&0e--0 to 1 inch; dark brown (10YR 3/3) moist, loose, partially decomposed organic, litter composed of needles, leaves and twigs; moderately acid (pH 6.0); abrupt smooth boundary. (1/2 to 3 inches thick)
Bw1--1 to 7 inches; pale brown (10YR 6/3) ashy silt loam, dark yellowish brown (10YR 4/4) moist; weak fine and medium subangular blocky structure; soft, friable, slightly sticky and slightly plastic; weakly smeary; common very fine and fine roots; common very fine and fine irregular pores; neutral (pH 6.6); clear wavy boundary. (5 to 7 inches thick)
Bw2--7 to 12 inches; pale brown (10YR 6/3) ashy silt loam, yellowish brown (10YR 5/4) moist; weak fine and medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; weakly smeary; common very fine and fine few coarse roots; common very fine and fine irregular pores; neutral (pH 6.6); abrupt smooth boundary. (4 to 7 inches thick)
2E--12 to 22 inches; light gray (10YR 7/2) very fine sandy loam, light brownish gray (10YR 6/2) moist; moderate medium and coarse subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; common very fine and fine roots; common very fine and fine irregular pores; neutral (pH 6.6); clear wavy boundary. (0 to 14 inches thick)
2B/E--22 to 31 inches; 60 percent brown (10YR 5/3) silty clay loam (B part), brown (10YR 4/3) moist; moderate medium and coarse subangular blocky structure; hard, friable, moderately sticky and moderately plastic; few very fine and fine roots; common very fine and fine tubular pores; 40 percent light gray (10YR 7/2) silt loam (A part), brown (10YR 5/3) moist; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and nonplastic; few very fine, fine and medium roots; common very fine and fine irregular pores; clay films in pores of B part; slightly acid (pH 6.4); clear wavy boundary. (0 to 12 inches thick)
2Bt--31 to 48 inches; light yellowish brown (2.5Y 6/4) silty clay loam, dark grayish brown (2.5Y 4/2) moist; moderate medium subangular blocky structure; very hard, firm, very sticky and moderately plastic; few very fine and fine roots; common very fine irregular pores; common distinct clay film on face of peds and lime in pores; dark brown (10YR 3/3) moist, organic staining between peds; neutral (pH 6.6) gradual wavy boundary. (15 to 19 inches thick)
2BCt--48 to 60 inches; light olive gray (5Y 6/2) silty clay loam, olive gray (5Y 5/2) moist; moderate medium and thick platy and medium and coarse subangular blocky structure; very hard, very firm, very sticky and moderately plastic; few very fine and fine roots; few very fine irregular pores; common distinct clay films on face of peds and lime in pores; very dark grayish brown (10YR 3/2) moist; organic staining between peds, neutral (pH 6.6).
TYPE LOCATION: Pend Oreille County, Washington; 1,000 feet south and 2,600 feet east of the Northwest corner sec. 5, T., 37N., R. 43E, WM. (photo 10C07).
RANGE IN CHARACTERISTICS: The mean annual soil temperature at 20 inches is 44 to 47 degrees F. These soils are usually moist, but are dry in all parts between 4 and 12 inches for 45 to 60 consecutive days. The thickness of the volcanic ash mantle is 7 to 14 inches. Content of coarse fragments in the control section average from 0 to 5 percent. The upper 20 inches of the argillic horizon contains 35 to 50 percent clay. Solum thickness exceeds 40 inches.
The Bw horizon has hue of 10YR or 7.5YR, value of 5 to 7 dry, 2 to 5 moist, and chroma of 2 to 5 moist or dry. It is massive or has a weak structure. Some pedons have weakly developed A horizons up to 4 inches thick overlying the Bw horizons.
The 2E horizon has hue of 10YR or 2.5Y, value of 6 through 8 dry, 5 or 6 moist and chroma of 1 or 2 moist and dry. It is silt loam, loam, or very fine sandy loam. Reaction is neutral or slightly acid.
The E part of the 2B/E horizon has hue of 10YR or 2.5Y, dry values of 6 to 8 dry, 5 or 6 moist, and chromas of 1 through 3 moist or dry. It is silt loam or very fine sandy loam. The B part has hue of 10YR or 2.5Y, values of 5 or 6 dry, 4 or 5 moist, and chroma of 2 through 4 moist or dry. It is clay loam, silty clay loam, or silty clay.
The 2Bt horizon has hue of 2.5Y, 5Y, or 10YR, value of 5 through 8 dry, 4 It is heavy silty clay loam, silty clay, clay loam or clay. It has moderate to strong prismatic or blocky structure. Reaction is neutral to moderately acid.
The 2BCt horizon has hue of 10YR, 5Y or 2.5Y, value of 5 through 8 dry, 4 to 6 moist and chroma of 1 to 3 moist or dry. It is stratified, silty clay, silty clay loam, clay, and very fine sandy loam. It has moderate medium or thick platy structure breaking to medium and coarse subangular blocky structure. Reaction is neutral or slightly acid.
The 2C horizon when present has hue of 10YR, 5Y or 2.5Y, value of 6 through 8 dry, 4 to 6 moist, and chroma of 1 to 3 moist and dry. It is silt loam, silty clay, silty clay loam, clay, or very fine sandy loam or is stratified with 2 or more of these textures. Reaction is neutral to slightly acid.
COMPETING SERIES: This is the Friedlander series. Friedlander soils are dry for 60 to 75 consecutive days following the summer solstice.
GEOGRAPHIC SETTING: Anglen soils are slopes are 0 to 65 percent on terraces and terrace escarpments at elevations of 1,900 to 4,000 feet. These soils formed in volcanic ash and loess over glacial lacustrine materials. They occur in a climate characterized by cold wet winters and warm dry summers. The average rainfall is 18 to 30 inches; mean annual temperature is 43 to 45 degrees F.; and the frost-free period is estimated at 90 to 120 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cusick, Dalkena, Martella, Nevine, Newbell, Scotia and Talls soils and the competing Aits, Merkel, Tolo, and Waits soils. Cusick soils are mottled and lack the ash mantle. Dalkena soils are coarse-loamy over clayey and lack an argillic horizon. Martella soils are fine-silty. Nevine, Newbell, and Talls soils are loamy-skeletal and lack an argillic horizon. Scotia soils are coarse-loamy.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow to rapid runoff; permeability is moderately slow.
USE AND VEGETATION: Used for woodland, grazed woodland, and cropland. Hay, pasture, and small grains are principal crops. Native vegetation includes Douglas-fir, red alder, western larch, grand fir, lodgepole pine and ponderosa pine with an understory of pinegrass, saskatoon serviceberry, Oregon-grape, rose, common snowberry, creambush oceanspray, strawberry, and red whortleberry.
DISTRIBUTION AND EXTENT: Northeastern Washington and possibly northern Idaho. Series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Ferry County (North Ferry Area), Washington, l970.
REMARKS: Diagnostic horizons and features recognized in this pedon are an ochric epipedon from the mineral surface to 12 inches consisting of volcanic ash with an estimated moist bulk density less than 1.0 g/cc and acid-oxalate extractable aluminum plus one-half of the acid-oxalate extractable iron of more than 1.0 percent, an albic horizon from 12 to 22 inches, and an argillic horizon from 22 to 60 inches that is tongued with albic material from 22 to 31 inches. This description reflects a change in classification from fine, mixed, frigid Andic Palexeralfs to fine, isotic, frigid Andic Palexeralfs.