LOCATION DILTON TNEstablished Series
TAXONOMIC CLASS: Clayey, mixed, active, thermic Lithic Endoaquolls
TYPICAL PEDON: Dilton silty clay loam -- forested. (Colors are for moist soil unless otherwise stated.)
A--0 to 9 inches; very dark grayish brown (10YR 3/2) silty clay loam; moderate fine and medium granular structure; friable; common fine roots; common fine pores; common fine distinct dark brown (7.5YR 3/3) and dark reddish brown (5YR 3/3) iron and manganese concretions; neutral; clear wavy boundary. (4 to 10 inches thick)
A2--9 to 12 inches; very dark gray (10YR 3/1) silty clay; few fine and medium distinct very dark grayish brown (2.5Y 3/2) mottles; moderate fine and medium subangular blocky structure; firm; common fine roots; common fine pores; many fine and medium dark brown (10YR 3/3) and black (10YR 2/1) manganese concretions; few angular fragments of limestone; slightly alkaline; clear wavy boundary. (0 to 6 inches thick)
Cg--12 to 16 inches; dark grayish brown (2.5Y 4/2) clay; few medium distinct black (10YR 2/1) and few medium faint light brownish gray (2.5Y 6/2) mottles; moderate fine and medium subangular blocky structure; firm; few fine roots; few fine pores; many fine and medium dark brown (10YR 3/3) and black (10YR 2/1) manganese concretions; few angular fragments of limestone; slightly alkaline.
R--16 inches; hard limestone bedrock.
TYPE LOCATION: Rutherford County, Tennessee; 5.5 miles southeast of Murfreesboro, 1.8 miles south of intersection US 70 and Dry Branch, 1.3 miles northeast of Mt. Herman Church. (USGS -Dilton Quadrangle LAT: 35/48/14 LONG: 86/17/19).
RANGE IN CHARACTERISTICS: Depth to limestone bedrock ranges from 8 to 20 inches. Reaction ranges from slightly acid to slightly alkaline in each horizon. Angular fragments of limestone and chert range from 0 and 15 percent throughout.
The A horizon has hue of 10YR or 2.5Y, value of 3 or 2, and chroma of 1,2, or neutral. Mottles or redox concentrations in shades of gray, yellow, and brown range from none to common. Texture is silty clay loam or silty clay.
The Cg horizon has hue of 10YR to 5Y, value of 4 or 5, and chroma of 2 or less. Some pedons have hue of neutral and value of 4 or 5. Mottles and redox concentrations in shades of brown, yellow, and gray range from few to common. Texture is silty clay loam, silty clay, or clay.
COMPETING SERIES: These are the Dekoven, Eagleville, Egam, Godwin, Iberia, Lanton, and Roellen series. All of these soils are deeper than 20 inches to bedrock. In addition, Dekoven and Lanton soils have mollic epipedons greater than 24 inches thick and have less than 35 percent clay in the control section. Egam and Godwin soils also have mollic epipedons greater than 24 inches thick. Godwin soils have value of 3 or more immediately below the mollic epipedon.
GEOGRAPHIC SETTING: Dilton soils are on level and nearly level flood plains underlain by limestone bedrock. Slopes range from 0 to 3 percent. The soils formed in fine-textured alluvium. Outcrops of limestone bedrock are common in the landscape. Near the type location, mean annual temperature is 60 degrees F, and mean annual precipitation is 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: The competing Eagleville , Godwin, and Egam series and the Gladeville, Talbott, Barfield, Tupelo, and Capshaw series. The Gladeville and Barfield series have chroma of 3 or more immediately below the mollic epipedon and are on uplands. Talbott series do not have a mollic epipedon and are greater than 20 inches to bedrock. Capshaw and Tupelo series are deeper than 60 inches to bedrock and are moderately well drained and somewhat poorly drained.
DRAINAGE AND PERMEABILITY: Poorly drained; runoff is negligible; permeability is slow or very slow.
USE AND VEGETATION: About 1/3 of the area is cleared and used as pasture. The remainder is in woodland. Oak, hickory, elm, maple, American sycamore, Osage orange, and green ash are the dominant trees. Canebrakes are common.
DISTRIBUTION AND EXTENT: Nashville Basin of Tennessee. The series is of very small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Rutherford County, Tennessee; 1974.
REMARKS: The soil was previously included as shallow phases of the Roellen series.
Diagnostic horizons and features recognized in this pedon:
Mollic epipedon - 0 to 12 inches (A and A2 horizons)
Aquic conditions: - endosaturation of the horizons above bedrock, redox depletions of chroma of 2 or less from the surface to bedrock; redox concentrations of manganese and iron oxides range from common to many in all horizons.