LOCATION SEWANEE TNEstablished Series
TAXONOMIC CLASS: Coarse-loamy, siliceous, semiactive, mesic Fluvaquentic Dystrudepts
TYPICAL PEDON: Silt loam--cultivated. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; brown (10YR 4/3) loam; few fine faint dark grayish brown mottles; weak medium granular structure; very friable; many fine roots; strongly acid; clear smooth boundary. (5 to 10 inches thick)
Bw1--8 to 20 inches; brown (10YR 4/3) loam; common fine and medium faint light brownish gray (10YR 6/2) and pale brown (10YR 6/3) mottles; weak medium subangular blocky and weak fine granular structure; very friable; many fine roots; strongly acid; abrupt smooth boundary.
Bw2--20 to 27 inches; brown (10YR 5/3) loam; common fine and medium faint mottles of yellowish brown (10YR 5/4) and light brownish gray (10YR 6/2) and distinct brown (7.5YR 4/4) mottles; weak medium subangular blocky structure; friable; common fine roots; strongly acid; clear smooth boundary.
Bw3--27 to 34 inches; mottled brown (7.5YR 4/4), yellowish brown (10YR 5/4) and light brownish gray (10YR 6/2) loam; weak medium subangular blocky structure; friable; few fine roots; strongly acid; clear smooth boundary. (Thickness of th Bw horizon ranges from 15 to 35 inches.)
C--34 to 50 inches; light brownish gray (10YR 6/2) loam; common fine faint mottles of yellowish brown and pale brown; massive; friable; strongly acid. (10 to 20 inches thick)
R--50 inches; sandstone bedrock that is weathered in the upper part.
TYPE LOCATION: White County, Tennessee; 3.2 miles south of DeRossett; 100 yards west on Newberry Road, 250 feet north of Newberry Road.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 25 to 40 inches. Depth to bedrock ranges from 40 inches to 60 inches or more. Fragments of sandstone range from 0 to 15 percent by volume in the A and B horizons and from 0 to 30 percent in the C horizon. The fragments are chiefly up to 3 inches in diameter. The soil is very strongly acid or strongly acid except where limed.
The A or Ap horizon has hue of 10YR, value of 3 to 5 and chroma of 2 to 4. Horizons with value of 3 are less than 7 inches thick. The E horizon, where present, has hue of 10YR, value of 4 or 6 and chroma of 2 to 4. The A and E horizons are loam, fine sandy loam or silt loam.
The Bw horizon has hue of 7.5YR to 2.5Y, value of 4 to 6 and chroma of 3 or 4, except some pedons have chroma of 2 in the lower part. Mottles of chroma 2 or less are within 24 inches of the soil surface. It is loam, fine sandy loam or silt loam.
The C horizon has hue of 10YR or 2.5Y value of 5 or 6 and chroma of 1 to 4. Mottles are in shades of gray and brown. The fine earth textures are loam, sandy loam, fine sandy loam, or silt loam.
COMPETING SERIES: There are on other series in this family. Soils in similar families are the Chewacla, Codorus, Lobelville and Philo series. All of the series except Lobelville have mixed mineralogy. In addition Chewacla and Cordous soils are fine-loamy. Lobelville soils are thermic and fine-loamy.
GEOGRAPHIC SETTING: Sewanee soils are on nearly level bottomlands. Slopes are 0 to 3 percent. The soil formed in alluvium washed from soils formed in material weathered from sandstone and shale. Average annual air temperature is 56 degrees F., and average annual precipitation is 54 inches near the type location.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the well drained Ealy soils on flood plains and the Ramsey, Lily, Lonewood, and Wallen series on uplands. Ramsey soils are less than 20 inches to rock, Wallen and Lily soils are 20 to 40 inches to rock, and Lonewood soils are more than 40 inches to bedrock.
DRAINAGE AND PERMEABILITY: Moderately well drained; slow runoff; moderate permeability. Many areas are occasionally flooded.
USE AND VEGETATION: About two-thirds of the acreage is cleared and cultivated or pastured. The remainder is in mixed hardwood forest.
DISTRIBUTION AND EXTENT: The Cumberland Plateau and Appalachian Ridges and Valleys in Tennessee and possibly in Alabama, Arkansas, Kentucky, Missouri, Pennsylvania, Virginia, and West Virginia. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Hawkins and Hancock Counties, Tennessee; 1973.
REMARKS: Diagnostic horizons in this pedon are:
Ochric epipedon- 0 to 8 inches (Ap horizon)
Cambic horizon- 8 to 34 inches (Bw horizon)