LOCATION PINKSTON VA+NCEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, semiactive, mesic Ruptic-Ultic Dystrudepts
TYPICAL PEDON: Pinkston fine sandy loam (in an area of Pinkston fine sandy loam 6 to 10 percent slopes), in a woodland. (Colors are for moist soil unless otherwise indicated.)
A--0 to 2 inches; dark gray (5YR 4/1) fine sandy loam; weak fine granular structure; very friable; many fine roots; 7 percent gravel; strongly acid; abrupt smooth boundary. (0 to 6 inches thick)
E--2 to 8 inches; weak red (2.5YR 4/2) fine sandy loam; weak fine granular structure; very friable; common fine roots; 10 percent rock fragments up to 3 inches in diameter; very strongly acid; clear smooth boundary. (0 to 8 inches thick)
Bw/Bt--8 to 19 inches; 60 percent weak red (2.5YR 4/2) loam with 40 percent irregularly shaped bodies of silty clay loam; reddish brown (5YR 4/3) crushed; weak fine subangular blocky structure; friable, slightly sticky, slightly plastic; few fine and medium roots; few clay films on faces of peds; common fine flakes of mica; 12 percent rock fragments up to 3 inches in diameter; very strongly acid; clear irregular boundary. (5 to 20 inches thick)
C--19 to 26 inches; yellowish brown (10YR 5/6), reddish brown (5YR 4/3), pink (7.5YR 7/4), and purple loam with few thin lenses of clay; reddish brown color more dominant with depth; massive; friable, nonsticky, nonplastic; strongly acid; diffuse irregular boundary. (0 to 24 inches thick)
R--26 inches; sandstone and conglomerate; strongly cemented; very high excavation difficulty.
TYPE LOCATION: Charlotte County, Virginia; on Highway 40, 300 feet northeast of Roanoke Creek bridge; USGS Unknown topographic quadrangle; lat. 00 degrees 00 minutes 00 seconds N. and long. 00 degrees 00 minutes 00 seconds W.
RANGE IN CHARACTERISTICS:
Depth to top of Cambic horizon: 1 to 15 inches
Depth to base of Cambic horizon: 15 to 40 inches
Depth to Bedrock: 20 to 40 inches to hard bedrock
Rock fragment Content: Typically, less than 15 percent, but ranges from 1 to 35 percent in the A, E and B horizon, and 10 to 50 percent in the C horizon; mostly small weathered fragments of sandstone, conglomerate, and quartz
Soil Reaction: Very strongly or strongly acid, unless limed.
RANGE OF INDIVIDUAL HORIZONS:
A horizon:
Color--hue of 5YR to 2.5Y, value of 3 to 5, chroma of 1 to 4.
Texture (fine-earth fraction)--loamy sand, fine sandy loam, sandy loam, loam, very fine sandy loam, or silt loam
Ap horizon (if it occurs):
Color--hue of 2.5YR to 10YR, value of 4 to 6, chroma of 2 to 6
Texture (fine-earth fraction)--loamy sand, fine sandy loam, sandy loam, loam, very fine sandy loam, or silt loam
E horizon or BE horizon (if it occurs):
Color--hue of 2.5YR to 2.5Y, value of 4 to 6, chroma of 2 to 6
Texture (fine-earth fraction)--fine sandy loam, sandy loam, loam, very fine sandy loam, or silt loam
Bw/Bt horizon:
Color--hue of 2.5YR to 10YR, value of 3 to 7, chroma of 2 to 8
Texture (fine-earth fraction)--most pedons have discontinuous, irregularly shaped areas of different texture including fine sandy loam, sandy loam, loam, very fine sandy loam, silt loam, sandy clay loam, clay loam, or silty clay loam
BC horizon (if it occurs):
Color--hue of 2.5YR to 10YR, value of 3 to 7, chroma of 2 to 8
Texture (fine-earth fraction)--most pedons have discontinuous, irregularly shaped areas of different texture including fine sandy loam, sandy loam, loam, very fine sandy loam, silt loam, sandy clay loam, clay loam, or silty clay loam. It may also have irregularly shaped intrusions of highly weathered sandstone and conglomerate from below.
C horizon:
Color--variegated, in shades of brown, pink, purple, red, white, or yellow
Texture (fine-earth fraction)--fine sandy loam, sandy loam, very fine sandy loam, loam, or silt loam, including saprolite of these textures
Cr horizon (if it occurs):
Bedrock kind--sandstone, siltstone, and conglomerate, 20 to 36 inches below the soil surface
Bedrock hardness--extremely weakly cemented to moderately cemented
Fracture interval--greater than 4 inches
Excavation difficulty--low to high
R horizon:
Bedrock kind--sandstone, siltstone, or conglomerate
Bedrock hardness--strongly cemented to indurated
Fracture interval--greater than 4 inches
Excavation difficulty--very high or extremely high
COMPETING SERIES: There are no known series.
GEOGRAPHIC SETTING:
Landscape: Piedmont basin
Landform: Low hill
Geomorphic Component: Interfluve, sideslope, head slope, nose slope
Hillslope Profile Position: Summit, shoulder, backslope
Parent Material: Residuum weathered from Triassic age materials, mostly sandstone, siltstone, or conglomerate
Slope: 0 to 50 percent, typically 10 to 20 percent
Elevation: 100 to 600 feet
Frost Free Period: 160 to 205 days
Mean Annual Air Temperature: 52 to 57 degrees F.
Mean Annual Precipitation: 40 to 55 inches
GEOGRAPHICALLY ASSOCIATED SOILS:
Ayersville soils--have moderate permeability and dark red subsoil; on similar landforms
Clover soils--are very deep to bedrock, have moderately shrink-swell potential, and are well drained; on higher landforms
Easthamlet soils--are moderately deep to soft bedrock (deep to hard bedrock), are somewhat poorly drained, and have very high shrink-swell potential; on lower-lying landforms
Lackstown soils--are moderately well to somewhat poorly drained; on lower-lying landforms
Rockbarn soils--are moderately deep (20 to 40 inches) to soft bedrock and deep or very deep (40 inches or more) to hard bedrock; on similar landforms
Stoneville soils--are deep (40 to 60 inches) to soft bedrock; on similar landforms
Straightstone soils--are very deep to bedrock and are well drained; on similar landforms
Wolftrap soils--have very high shrink-swell potential and are moderately well drained; on lower-lying landforms
DRAINAGE AND PERMEABILITY:
Depth Class: Moderately deep to bedrock
Drainage Class (Agricultural): Well drained or excessively well drained
Internal Free Water Occurrence: Very deep
Flooding Frequency and Duration: None
Ponding Frequency and Duration: None
Index Surface Runoff: Very low to medium
Permeability: Moderately rapid
Shrink-Swell Potential: Low
USE AND VEGETATION:
Major Uses: Woodland and pasture
Dominant Vegetation: Where cultivated--corn, small grain, and hay. Where wooded-Upland oaks, hickory, dogwood, Virginia pine, and shortleaf pine.
DISTRIBUTION AND EXTENT:
Distribution: Triassic Basin areas in the mesic part of the Southern Piedmont of Virginia and North Carolina.
Extent: Moderate.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Charlotte County, Virginia, 1970.
REMARKS:
Diagnostic horizons and soil characteristics recognized in this pedon:
Ochric epipedon--the zone from 0 to 8 inches (A and E horizons)
Cambic horizon--the zone from 8 to 19 inches (Bw/Bt horizon)
Other soil features identified with this pedon:
Series control section--the zone from 0 to 26 inches
ADDITIONAL DATA:
Laboratory Data: No laboratory data available.
Database Information:
Typical Pedon Data Mapunit ID--405853
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation VA0001 PINKSTON 0-50 52-57 160-205 40-55 100-600 VA0210 PINKSTON 0-50 52-57 160-205 40-55 100-600 VA0271 PINKSTON 0-50 52-57 160-205 40-55 100-600 VA0272 PINKSTON 0-50 52-57 160-205 40-55 100-600SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness VA0001 NONE >6.0 - - 20-40 HARD VA0210 NONE >6.0 - - 20-40 HARD VA0271 NONE >6.0 - - 20-40 HARD VA0272 NONE .6.0 - - 20-40 HARD
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- VA0001 0-8 FSL SL LS 0-5 75-100 5-18 2-10 VA0001 0-8 SIL L VFSL 0-5 75-100 5-18 2-10 VA0001 8-19 L SL GR-SIL 0-10 55-100 10-18 4-12 VA0001 19-26 GR-SL L SIL 0-10 35-85 10-20 4-10 VA0001 26-36 UWB - - - -
VA0271 0-8 CB-SL CB-FSL 20-35 75-95 5-18 - VA0271 8-19 L SL GR-SIL 0-10 55-100 10-18 - VA0271 19-26 GR-SL L SIL 0-10 35-85 10-20 - VA0271 26-36 UWB - - - -
VA0272 0-8 STV-SL STV-FSL 35-60 75-95 5-18 - VA0272 8-19 L SL GR-SIL 0-10 55-100 10-18 - VA0272 19-26 GR-SL L SIL 0-10 35-85 10-20 - VA0272 26-36 UWB - - - -
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll VA0001 0-8 4.5-5.5 0.5-2.0 0-0 2.0-6.0 LOW VA0001 0-8 4.5-5.5 0.5-2.0 0-0 0.6-2.0 LOW VA0001 8-19 4.5-5.5 0.5-1.0 0-0 2.0-6.0 LOW VA0001 19-26 4.5-5.5 0.0-0.5 0-0 2.0-6.0 LOW VA0001 26-36 - - - 0.2-0.6 -
VA0271 0-8 4.5-5.5 0.5-2.0 0-0 2.0-6.0 LOW VA0271 8-19 4.5-5.5 0.0-0.5 0-0 2.0-6.0 LOW VA0271 19-26 4.5-5.5 0.0-0.5 0-0 2.0-6.0 LOW VA0271 26-36 - - - 0.00-0.2 -
VA0272 0-8 4.5-5.5 0.5-2.0 0-0 2.0-6.0 LOW VA0272 8-19 4.5-5.5 0.0-0.5 0-0 2.0-6.0 LOW VA0272 19-26 4.5-5.5 0.0-0.5 0-0 2.0-6.0 LOW VA0272 26-36 - - - 0.00-0.2 -