LOCATION MOUNT RUSH VA+NCTentative Series
MLRA(s): 136
MLRA Office Responsible: Raleigh, North Carolina
Depth Class: moderately deep
Drainage Class (Agricultural): Well drained
Internal Free Water Occurrence: Very deep, absent
Index Surface Runoff: medium to very high
Permeability: Moderately slow to slow
Landscape: Piedmont
Landform: ridge, hill
Hillslope Profile Position: Summits, shoulders, back slopes
Geomorphic Component: Interfluves, noseslopes, sideslopes
Parent Material: Clayey residuum weathered from mixed felsic and mafic metamorphic and igneous rocks
Slope: 0 to 40 percent
Elevation (type location): 450 feet
Mean Annual Air Temperature: 55 degrees F.
Mean Annual Precipitation: 45 inches
TAXONOMIC CLASS: Fine, mixed, semiactive, mesic Typic Hapludults
TYPICAL PEDON: Mount Rush sandy loam, 4 percent slope, forest cutover. (Colors are for moist soil unless otherwise indicated.)
Ap--0 to 6 inches; dark reddish brown (5YR 3/4) sandy loam; weak medium granular structure; very friable; slightly sticky; slightly plastic; many fine and medium roots between peds; 5 percent subrounded quartz cobbles, 8 percent angular greenstone paragravel; many very fine and fine vesicular pores; strongly acid, clear wavy boundary.
Bt--6 to 26 inches; red (2.5YR 4/6) very paracobbly clay loam; moderate medium angular blocky structure; friable, moderately sticky; moderately plastic; common fine and few medium roots between peds; 15 percent angular paragravel, 25 percent angular paracobbles; many discontinuous distinct red (2.5YR 4/6) clay films on faces of peds; strongly acid; clear wavy boundary.
Crt--26 to 50 inches; weathered metavolcanic greenstone bedrock that crushes to loam; common medium prominent black (10YR 2/1) non-redoximorphic mottles; massive; extra firm and slightly rigid; few fine roots in clay flows; red (2.5YR 4/6) loam clay flows in fractures that average greater than 4 inches apart; strongly acid.
TYPE LOCATION: Buckingham County, Virginia; in a forest cutover area; USGS Gold Hill Virginia topographic quadrangle; lat. 37 degrees 35 minutes 22.5 seconds N. and long. 78 degrees 19 minutes 54.5 seconds W., NAD 27.
RANGE IN CHARACTERISTICS:
Depth to top of Argillic horizon: 4 to 12 inches
Depth to base of Argillic horizon: 12 to 38 inches
Depth to Paralithic contact: 20-40 inches
Depth to hard bedrock: Greater than 40 inches
Depth to Seasonal High Water Table: Greater than 60 inches
Rock Fragment content: quartzite 0 to 35 percent, by volume, throughout and parent material pararock fragments range from 0 to 35 percent throughout
Soil Reaction: Extremely acid to slightly acid throughout, unless limed
Mica content: None to common in the B and C horizon
Other features: Linear extensibility percentage (LEP) of the heaviest textured subsurface horizon is 3 to 6 (Moderate shrink-swell potential).
Silt content of the particle-size control section is less than 30 percent.
RANGE OF INDIVIDUAL HORIZONS:
A or Ap horizon:
Color--hue of 2.5YR to 7.5YR, value of 3 to 6, chroma of 2 to 6
Texture (fine-earth fraction)--sandy loam, silt loam or loam
AB, BA or BE horizon (if they occur):
Color--hue of 2.5YR to 5YR, value of 3 to 6, chroma of 4 to 8
Texture (fine-earth fraction)--loam, sandy clay loam, or clay loam
Bt horizon:
Color (upper part) 2.5YR or 5YR, value of 3 to 6, chroma of 4 to 8
Color (lower part)-10R to 5YR, value of 3 to 6, chroma of 4 to 8
Texture (fine-earth fraction)--clay loam or clay
Mottles (if they occur)--non-redoximorphic mottles in shades of red, brown, yellow, or white; mostly in the lower Bt horizon
BC horizon (where present):
Color--hue of 2.5YR to 10YR , value of 4 to 7, chroma of 4 to 8
Texture (fine-earth fraction)--loam, sandy clay loam, or clay loam
Mottles (if they occur)--non-redoximorphic mottles in shades of red, brown, yellow, or white
C horizon (where present):
Color usually multicolored in shades of red, brown, yellow, or white
Texture (fine-earth fraction)--sandy loam, loam, sandy clay loam, or clay loam
COMPETING SERIES:
In same family:
Braddock soils--do not flood and formed in colluvium and alluvium derived dominantly from a mixture of crystalline rocks; on footslopes of ridges and colluvial fans and adjacent high terraces primarily in MLRA 130
Buffstat soils-deep soils formed in residuum from sericite schist or graphitic schist; on hills and ridges
Cassville soils-very deep soils, formed in residuum from felsic or intermediate igneous or metamorphic rock
Christian soils--formed in residuum from interbedded limestone, sandstone, siltstone, and shale; on hills and ridges
Clifton soils-very deep soils, formed in residuum weathered from intermediate and mafic igneous and high-grade metamorphic rocks that are high in ferromagnesium minerals
Clover soils--formed in residuum weathered from Triassic materials of the
Piedmont uplands; on ridges and hills
Danripple soils--formed in old alluvium
Flagspring soils-very deep soils, formed in colluvium from cherty limestone over residuum from limestone and tripoli on ridge tops
Groseclose soils-very deep soils, formed in materials weathered from limestone, shale, siltstone, and sandstone
Howell soils--formed in fine unconsolidated sediments containing detectable amounts of diatomaceous earth and/or glauconite; on uplands in the northern part of the Atlantic Coastal Plain
Muse soils-deep or very deep soils, formed in residuum or colluvium from shale and siltstone
Sequoia soils-moderately deep soils, formed in residuum of shale and siltstone
Spears Mountain soils (tentative)-deep soils formed in schist, phyllite and other fine-grained rock
Totier soils--formed in residuum weathered from red shale of Triassic age; on Piedmont uplands
Unison soils--have a seasonal high water table at a depth of more than 72 inches below the soil surface and formed in colluvium and alluvium 3 to 6 feet thick derived from a mixture of basic rocks or basic and acidic crystalline rocks; on footslopes, alluvial fans, or stream terraces primarily in MLRA 130-Blue Ridge
Warminster soils--formed in residuum of Triassic red shale; on summits, shoulders, and back slopes of Piedmont hills, ridges, interfluves, and side slopes
Yellowbottom soils-very deep soils, formed in residuum of sericite schist, phyllonite and metamonzagranite
In subactive family:
Diana Mills-deep to paralithic contact
Littlejoe-deep to paralithic contact
Penhook soils-Deep to paralithic contact
Strawfield soils-Moderately deep to lithic contact
Tick soils-deep to densic contact, formed in lacustine sediments
GEOGRAPHIC SETTING:
Landscape: piedmont
Landform: ridge, hill
Hillslope Profile Position: Summits, shoulders, back slopes
Geomorphic Component: Interfluves, noseslopes, side slopes
Parent Material: Clayey residuum weathered from mixed felsic and mafic metamorphic and igneous rocks (commonly hornblende gneiss and schist)
Elevation: 250 to 1,000 feet
Mean Annual Air Temperature: 52 to 57 degrees F.
Mean Annual Precipitation: 40 to 50 inches
Frost Free Period: 165 to 200 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Diana Mills soils-- deep, formed in clayey residuum weathered from mixed felsic and mafic metamorphic and igneous rocks
Minnieville soils-very deep soils, have moderate permeability; on similar landforms.
Oak Level soils-- very deep on similar landforms.
Siloam soils-shallow soils on similar landforms
Spriggs soils-- are moderately deep to bedrock and have a fine-loamy particle-size control section; on similar landforms
DRAINAGE AND PERMEABILITY:
Drainage class (Agricultural): Well drained
Internal Free Water Occurrence: Very deep, absent
Index Surface Runoff: medium to very high
Permeability: Moderately slow to slow
USE AND VEGETATION:
Major Uses: Cultivated crops, pasture and woodland
Dominant Vegetation: Where cultivated--corn, soybeans, small grains, hay. Where wooded--upland oaks (white, black, red, and scarlet oak), red maple, blackgum, dogwood, and loblolly pine
DISTRIBUTION AND EXTENT:
Distribution: Virginia and North Carolina
Extent: Moderate
MLRA OFFICE RESPONSIBLE: Raleigh, North Carolina
SERIES PROPOSED: Buckingham County, Virginia, 2003.
REMARKS:
Diagnostic horizons and soil characteristics recognized in this pedon:
Ochric epipedon--the zone from 0 to 6 inches (Ap horizon)
Argillic horizon--the zone from 6 to 26 inches (Bt horizon)
Series control section--the zone from 0 to 36 inches
ADDITIONAL DATA: Typical pedon sampled and analyzed at VPI&SU as 00VA-029-004 (reference data). Additional data at VPI&SU as 00VA-029-006.
TABULAR SERIES DATA:
Slope Airtemp FrFr/Seas Precip Elevation 2- 25 52- 57 165-200 40- 50 250- 1000FloodL FloodH Watertable Kind Months Bedrock Hardness NONE 6.0-6.0 - 20-40 Soft
Depth Texture 3-Inch No-10 Clay% -CEC- 0-6 L SIL SL 0- 5 80-100 8-25 4- 20 0-6 GR-L GR-SL GR-SIL 2- 10 55- 85 8-25 4- 20 0-6 CL SCL 0- 5 80-100 20-35 10- 25 6-26 CL C 0- 5 80-100 40-60 15- 35 26-50 WB - - - -
Depth -pH- O.M. Salin Permeab Shnk-Swll 0-6 3.5-6.5 .5-2. 0- 0 0.6- 2.0 LOW 0-6 3.5-6.5 .5-2. 0- 0 0.6- 2.0 LOW 0-6 3.5-6.5 .5-1. 0- 0 0.6- 2.0 LOW 6-26 3.5-6.5 0.-.5 0- 0 0.06- 0.6 MODERATE 26-50 -------