LOCATION HALLISON NCEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, semiactive, thermic Typic Hapludults
TYPICAL PEDON: Hallison silt loam--forested. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 7 inches; brown (10YR 5/3) silt loam; weak medium granular structure; friable; common medium and fine roots; few fine iron and manganese concretions; strongly acid; clear smooth boundary. (2 to 8 inches thick)
E--7 to 11 inches; pale brown (10YR 6/3) loam; weak fine granular structure; friable; common fine roots; few fine iron and manganese concretions; very strongly acid; gradual wavy boundary. (0 to 8 inches thick)
Bt1--11 to 16 inches; yellowish brown (10YR 5/6) silty clay loam; moderate medium and fine subangular blocky structure; firm; few fine roots; few fine iron and manganese concretions; few faint clay films on faces of peds; strongly acid; gradual wavy boundary.
Bt2--16 to 23 inches; strong brown (7.5YR 5/6) silty clay loam; moderate medium subangular blocky structure; firm; few fine roots; few iron and manganese concretions; few faint brown (7.5YR 5/4) clay films on faces of peds; very strongly acid; gradual wavy boundary.
Bt3--23 to 36 inches; strong brown (7.5YR 5/8) silty clay loam; few fine prominent reddish brown (5YR 4/4) mottles; moderate medium subangular blocky structure; firm; few fine roots; few fine iron and manganese concretions; few distinct reddish brown (5YR 5/4) clay films on faces of peds; very strongly acid; gradual wavy boundary.
Bt4--36 to 41 inches; strong brown (7.5YR 5/6) silty clay loam; few medium prominent very pale brown (10YR 7/4) iron depletions; weak coarse subangular blocky structure; firm; few fine roots; few fine iron and manganese concretions; few distinct yellowish red (5YR 5/6) clay films on faces of peds; very strongly acid; gradual wavy boundary. (Combined thickness of Bt horizon is 15 to 40 inches.)
BC--41 to 48 inches; dark reddish brown (2.5YR 3/4) silty clay loam; few fine prominent light gray (10YR 7/2), common fine prominent brown (7.5YR 5/2), and few medium prominent yellow (10YR 7/6) iron depletions; weak coarse subangular blocky structure; firm; few fine iron and manganese concretions; very strongly acid; gradual wavy boundary. (0 to 12 inches thick)
Cr--48 to 60 inches; dark reddish brown (2.5YR 3/4) siltstone bedrock that is partially consolidated and can be dug with difficulty with a spade.
TYPE LOCATION: Moore County, North Carolina; about 2.4 miles northwest of Carthage on NC Highway 24 and 27; 0.5 mile north of intersection of NC Highway 24 and 27, and NC Highway 22 on NC 22; 0.2 mile east of NC 22 on logging road; 10 feet north of logging road in loblolly pine stand.
RANGE IN CHARACTERISTICS: Solum thickness ranges from 40 to 60 inches. Depth to paralithic contact with soft, weathered bedrock ranges from 40 to 60 inches. Reaction is very strongly acid or strongly acid, unless surface layers have been limed. Content of coarse fragments 1/4 to 10 inches in size comprises from 0 to 5 percent of the Ap and Bt horizons. Some pedons have up to 5 percent iron and manganese concretions in the A and Bt horizons.
The A or Ap horizon has hue of 10YR, value of 4 to 6, and chroma of 2 to 6. Texture is silt loam, fine sandy loam, very fine sandy loam, or loam.
The E horizon, where present, has hue of 7.5YR or 10YR, value of 5 to 7, and chroma of 3 to 6. Texture is silt loam, fine sandy loam, very fine sandy loam, or loam.
The Bt horizon has hue of 5YR to 10YR, value of 4 to 7, and chroma of 4 to 8. Iron depletions in shades of brown or yellow are in part of the Bt horizon of most pedons, as well as masses of iron accumulation in shades of red. Texture is silty clay loam or clay loam. In some pedons, there is a thin silty clay Bt horizon just above the Cr horizon.
The BC or CB horizon, where present, has hue of 2.5YR to 7.5YR, value of 3 to 7, and chroma of 3 to 8, and is commonly mottled in shades of gray, yellow, red, or brown which represent iron depletions and accumulations. Texture is silty clay loam, clay loam, or silt loam.
The C horizon, where present, has hue of 2.5YR to 7.5YR, value of 3 to 6, and chroma of 4 to 8 with mottles in shades of red, brown, yellow, and gray. In some pedons, the C horizon is mottled in shades of these colors. Texture is silt loam, loam, very fine sandy loam, fine sandy loam, or loam.
The Cr horizon has hue of 10R to 7.5YR, value of 3 to 6, and chroma of 2 to 8. It is soft, weathered Triassic siltstone, mudstone, or sandstone bedrock that can be dug with difficulty with a spade.
COMPETING SERIES: These are the Brandon, Choccolocco, and Pickwick series in the same family, and the Brickhaven, Carbonton, Mooshaunee, Claycreek, and Pageland series in closely related families. Brandon, Choccolocco, and Pickwick soils do not have a Cr horizon. In addition, Brandon and Choccolocco soils have lithologic discontinuities, which consist of loess over fluvial deposits or Coastal Plain clayey sediments respectively. Brickhaven and Carbonton soils are fine, mixed, semiactive, thermic Oxyaquic Hapludalfs. In addition, Carbonton soils have a Cr horizon at a depth of 20 to 40 inches. Mooshaunee and Pageland soils have a Cr horizon within a depth of 20 to 40 inches. Claycreek soils are Alfisols and lack a Cr horizon.
GEOGRAPHIC SETTING: Hallison soils are on gently sloping to moderately steep ridges and side slopes in the Triassic Basins of the Southern Piedmont. Slopes are commonly 2 to 15 percent but range from 2 to 25 percent. These soils formed in residuum weathered from Triassic siltstones, mudstones, and sandstones. Mean annual precipitation is 47.6 inches and mean annual air temperature is 61.5 degrees F. near the type location.
GEOGRAPHICALLY ASSOCIATED SOILS: In addition to the competing Mooshaunee and Claycreek soils, these are the Mayodan, Pinkston, Creedmoor, Granville, Polkton, and White Store soils. Mayodan and Creedmoor soils are clayey and lack a Cr horizon. Pinkston soils contain less clay and are underlain with hard bedrock at depths of 20 to 40 inches. White Store soils are clayey and have a Cr horizon at depths greater than 48 inches. Granville soils lack a Cr horizon, have lower silt content, and siliceous mineralogy. Polkton soils are clayey and have a Cr horizon at depths of 20 to 40 inches.
DRAINAGE AND PERMEABILITY: Well and moderately well drained; medium to rapid surface runoff; moderate and moderately slow permeability.
USE AND VEGETATION: These areas are mostly in woodland, and some small areas are in cropland and pasture. Common trees include loblolly pine, shortleaf pine, southern red oak, sweetgum, red maple, white oak, hickory, and yellow poplar. Understory plants include flowering dogwood, American holly, blueberry, and ginger.
DISTRIBUTION AND EXTENT: The Triassic Basins in the Southern Piedmont of North Carolina and possibly South Carolina. This series is of minor extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Moore County, North Carolina; 1987.
REMARKS: Diagnostic horizons and soil characteristics recognized in the typical pedon are:
Ochric epipedon - the zone from the soil surface to a depth of 11 inches (Ap and E horizons)
Argillic horizon - the zone from a depth of 11 to 41 inches (Bt1, Bt2, Bt3, and Bt4 horizons)
Paralithic contact - the contact with weathered bedrock at a depth of 48 inches (upper boundary of the Cr horizon)
MLRA:136 SIR: NC0200
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation
NC0200 HALLISON 2- 25 58- 62 180-220 45- 55 300- 450
SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness NC0200 NONE 2.5-4.0 PERCHED JAN-APR 40-60 SOFTSOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- NC0200 0-11 SIL VFSL L 0- 2 90-100 12-27 3- 9 NC0200 0-11 FSL 0- 2 90-100 6-20 2- 8 NC0200 11-41 SICL CL 0- 2 90-100 27-35 5- 8 NC0200 41-48 SICL CL SIL 0- 2 90-100 18-35 3- 7 NC0200 48-60 WB - - - -
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll NC0200 0-11 3.5- 6.0 1.-4. 0- 0 0.6- 2.0 LOW NC0200 0-11 3.5- 6.0 1.-4. 0- 0 2.0- 6.0 LOW NC0200 11-41 3.5- 5.5 0.-.5 0- 0 0.2- 2.0 LOW NC0200 41-48 3.5- 5.5 0.-.5 0- 0 0.2- 2.0 LOW NC0200 48-60 - - - -