LOCATION TUMBLING VAEstablished Series
TAXONOMIC CLASS: Fine, kaolinitic, mesic Typic Paleudults
TYPICAL PEDON: Tumbling on a 6 percent concave south-facing slope in a cultivated field at an elevation of 1,750 feet. (Colors are for moist soil unless otherwise stated)
Ap--0 to 6 inches; brown (10YR 4/3) loam; weak fine granular structure; friable, slightly sticky, slightly plastic; many fine and few medium roots; few fine pores; 2 percent rock fragments; moderately acid; abrupt smooth boundary. (4 to 12 inches thick)
Bt1--6 to 19 inches; strong brown (7.5YR 5/6) clay loam; weak medium subangular blocky structure; friable, slightly sticky, slightly plastic; common fine and few medium roots; common fine pores; few sand grains coated and bridged with clay; 2 percent rock fragments; strongly acid; gradual smooth boundary.
Bt2--19 to 47 inches; yellowish red (5YR 5/6) clay; moderate medium subangular blocky structure; friable, slightly sticky, slightly plastic; few fine roots; many fine pores; few faint clay films on faces of peds; 5 percent rock fragments; strongly acid; gradual smooth boundary.
Bt3--47 to 60 inches; red (2.5YR 4/6) cobbly clay; weak medium subangular blocky structure; friable, slightly sticky, slightly plastic; few fine roots; many fine pores; few faint clay films on faces of peds; 25 percent rock fragments; strongly acid. (Combined thickness of the Bt horizon is 48 to 90 inches)
TYPE LOCATION: Washington County, Virginia; about 1.0 mile northeast of the junction of VA-687 and VA-689. U.S.G.S. Brumley topographic quadrangle; Latitude 36 degrees, 48 minutes, 45 seconds N and Longitude 82 degrees, 00 minutes, 52 seconds W; NAD 1927
RANGE IN CHARACTERISTICS: The solum thickness and depth to bedrock are more than 60 inches. Semirounded rock fragments of sandstone and quartzite range from 0 to 35 percent in the soil. Reaction is very strongly acid or strongly acid throughout.
The Ap horizon has hue of 7.5YR or 10YR, value of 4 or 5, and chroma of 3 or 4. It is silt loam, loam, fine sandy loam or sandy loam
Some pedons have an A horizon that is less than 6 inches thick with hue of 5YR to 10YR, value of 2 or 3, and chroma of 2 or 3. It is silt loam, loam, fine sandy loam or sandy loam.
The Bt horizon has hue of 2.5YR to 10YR, value of 4 or 5, and chroma of 4 to 8. Some pedons have mottles with high value and chroma. It is clay loam, sandy clay loam, clay or silty clay loam.
Some pedons have a 2Bt horizon with hue of 2.5YR to 7.5YR, value of 4 or 5, and chroma of 4 to 8. Some pedons have mottles with high value and chroma. It is clay loam, sandy clay loam, silty clay loam, clay, silty clay or sandy clay.
COMPETING SERIES: Christiana, Dunmore and Shottower series are in the same family. Christiana soils developed in unconsolidated sediments on the Upper Coastal Plain. Dunmore soils developed in clayey residuum of limestones and dolomites. Shottower soils developed in old alluvium derived from sandstone, quartzite, limestone, shale and siltstone.
GEOGRAPHIC SETTING: Tumbling soils formed in material derived from weathered sandstone, quartzite and shale and are on colluvial fans and concave footslopes. Slope gradients range from 2 to 45 percent. Climate is humid continental. Mean annual air temperature ranges from 52 to 58 degrees F., and mean annual precipitation ranges from 38 to 46 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Atkins, Berks, Craigsville, Dekalb, Ernest, Frederick, Jefferson, Lily and Weikert series. Atkins and Craigsville soils have less clay in the subsoil and occur on floodplains. Berks, Dekalb, Lily and Weikert soils are shallower to bedrock and occur on convex ridgetops and side slopes. Ernest soils have a fragipan and are on similar landscapes. Frederick soils have more clay in the subsoil and occur on convex ridgetops and side slopes. Jefferson soils have less clay in the subsoil and are on similar landscape positions.
DRAINAGE AND PERMEABILITY: Well drained. The potential for surface runoff potential is low to high. Permeability is moderate.
USE AND VEGETATION: These soils are used mainly for woodland. Some areas are used for pasture and cultivated crops.
DISTRIBUTION AND EXTENT: MLRA 128 and 147 in the limestone valleys of Virginia and possibly West Virginia, Maryland and Tennessee. The soils are of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Roanoke County, Virginia, 1990.
REMARKS: Soils now within the range of the Tumbling series were previously correlated as Nolichucky, Jefferson and Allen series in published soil surveys. Diagnostic horizons and features recognized in this pedon are:
1. Ochric epipedon - the zone from 0 through 6 inches (Ap horizon)
2. Argillic horizon - the zone from 6 to 60 inches (Bt horizon)
ADDITIONAL DATA: Ranges for morphology, chemistry and particle-size distribution are based on 9 pedons. Mineralogical classification is based on 2 pedons.