LOCATION COLLEEN VAEstablished Series
TAXONOMIC CLASS: Clayey, kaolinitic, mesic Typic Hapludults
TYPICAL PEDON: Colleen gravelly loam - on a 4 percent slope in a fescue and orchard grass pasture. (Colors are for moist soil.)
Ap--0 to 9 inches; dark yellowish brown (10YR 4/4 gravelly loam; many medium distinct yellowish red (5YR 4/6) mottles; moderate fine granular structure; friable, slightly sticky, slightly plastic; many fine roots; 30 percent blue quartz gravel; moderately acid; abrupt smooth boundary. (0 to 12 inches thick.)
Bt1--9 to 29 inches; red (2.5YR 4/8) gravelly clay; moderate fine subangular blocky structure; firm, sticky, plastic; common fine roots; many distinct clay films on faces of peds; 25 percent blue quartz gravel; strongly acid; gradual smooth boundary.
Bt2--29 to 50 inches; red (2.5YR 4/8) gravelly clay; many medium distinct reddish yellow (7.5YR 7/8) mottles, and many medium prominent white (N 8/0) relict mottles; moderate fine and medium subangular blocky structure; firm, sticky, plastic; many distinct clay films on faces of peds; few fine flakes of mica; 25 percent blue quartz gravel; strongly acid; clear smooth boundary. (Combined thickness of the Bt horizon is 37 to 54 inches.)
C--50 to 72 inches; red (2.5YR 5/8), reddish yellow (5YR 6/8) and white (N 8/0) gravelly silty clay loam saprolite; massive; friable, slightly sticky, slightly plastic; common clay flows; few fine flakes of mica; 25 percent blue quartz gravel; strongly acid. (0 to 30 inches thick)
TYPE LOCATION: Nelson County, Virginia; about 0.6 miles southwest (231 degrees) of the intersection of Highways VA-672 and VA-655 and 1.1 miles east (100 degrees) of the intersection of Highways VA-151 and VA-674.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 40 to 60 inches or more. Depth to bedrock is more than 60 inches. Angular blue quartz and anorthosite gravel range form 0 to 35 percent in the soil. Reaction ranges from very strongly acid through slightly acid in the A and Ap horizons, from extremely acid through strongly acid in the Bt horizon, and from very strongly acid through moderately acid in the C horizon.
The A horizon, where present, has hue of 7.5YR or 10YR, value of 2 or 3, and chroma of 2 to 4. Where chroma is less than 4, the horizon is less than 6 inches thick.
The Ap horizon, where present, has hue of 7.5YR or 10YR, value of 4 or 5, and chroma of 3 to 6. It is fine sandy loam, loam, or silt loam in the fine earth fraction.
The E horizon, where present, has hue of 7.5YR or 10YR, value of 5 to 8, and chroma of 4 to 8. It is fine sandy loam, loam, or silt loam in the fine earth fraction.
The Bt horizon commonly has hue of 2.5YR through 7.5YR, value of 4 to 6, and chroma of 6 or 8. The lower part of most pedons is mottled, and colors inherited from saprolite range to neutral, value of 8, and chroma of 0. The Bt horizon is clay, clay loam, or silty clay loam in the fine earth fraction.
The C horizon is saprolite that is neutral or has hue of 2.5YR through 5Y, value of 4 to 6, and chroma of 0 to 8. It is sandy loam, loam, silt loam, silty clay loam, or clay loam in the fine earth fraction.
COMPETING SERIES: These are the Culpeper, Elioak, and Minnieville series in the same family. Culpeper soils contain rock fragments of arkosic sandstone, quartzite, phyllite, and schist and formed in materials weathered from these rocks. Elioak soils contain rock fragments of quartz muscovite schist and graywacke sandstone, formed in materials weathered from these rocks, and are moderately permeable. Minnieville soils contain rock fragments of hornblende gneiss or schist and formed in materials weathered from these rocks.
GEOGRAPHIC SETTING: Colleen soils are on convex ridges and sideslopes in the Northern Piedmont province. Slope gradients range from 2 to 25 percent. Colleen soils developed in residuum of anorthosite. Mean annual precipitation ranges from 36 to 44 inches and mean annual soil temperature ranges from 52 to 57 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the Pineywoods and Sketerville series. Pineywoods soils are poorly drained and Sketerville soils are moderately well drained.
DRAINAGE AND PERMEABILITY: Well drained. Permeability is slow. Runoff is medium.
USE AND VEGETATION: These soils are used for hay, pasture, and woodland.
DISTRIBUTION AND EXTENT: Virginia. Northern Piedmont uplands. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Nelson County, Virginia, 1992.
REMARKS: Diagnostic horizon and features recognized in this pedon are:
Ochric epipedon - the zone from 0 to 9 inches (Ap horizon).
Argillic horizon - the zone from 9 to 50 inches (Bw horizon).
Substratum - the zone from 50 to 72 inches (C horizon).
ADDITIONAL DATA: Ranges for morphology, chemistry, particle-size distribution, and mineralogy are based on 5 pedons.
SIR=VA0292 MLRA=148 REVISED=1/23/92, MHC