LOCATION LEEDSVILLE VAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, active, mesic Typic Hapludults
TYPICAL PEDON: Leedsville cobbly loam - on a northwest facing slope in a hardwood forest. (colors are for moist soil)
Ap--0 to 4 inches; reddish brown (5YR 4/3) cobbly silt loam; moderate fine granular structure; very friable, slightly sticky, nonplastic; many fine and medium roots; 10 percent subrounded cobbles, 5 percent gravel; strongly acid; clear smooth boundary. (1 to 9 inches thick)
BA--4 to 10 inches; reddish brown (5YR 4/4) gravelly silt loam; weak fine subangular blocky structure; friable, slightly sticky, slightly plastic; many very fine and fine roots; 15 percent gravel, 2 percent subrounded cobbles; very strongly acid; clear smooth boundary. (0 to 9 inches thick)
Bt--10 to 46 inches; reddish brown (2.5YR 4/4) loam; moderate medium subangular blocky structure; friable, sticky, plastic; common fine, medium, and coarse roots; common distinct clay films on faces of peds; 10 percent gravel; very strongly acid; clear wavy boundary. (25 to 50 inches thick)
BC--46 to 66 inches; reddish brown (2.5YR 4/4) gravelly loam; weak coarse subangular blocky structure; friable, slightly sticky, slightly plastic; few medium and coarse roots; common medium prominent brown (10YR 5/3) soft masses of weathered gravel; 15 percent gravel, 5 percent cobbles; extremely acid; clear wavy boundary. (0 to 20 inches thick)
C--66 to 73 inches; variegated red (2.5YR 4/6), brown (10YR 5/3), and yellow (10YR 7/6) very cobbly loam; massive; friable, nonsticky, nonplastic; common fine prominent black manganese stains; 20 percent cobbles, 15 percent gravel; extremely acid.
TYPE LOCATION: Loudoun County, Virginia. 1/2 mile north of intersection of VA-860 and VA-617, 200 feet west of VA-860. (Virginia grid coordinates N 485,180; E 2,257,000)
RANGE IN CHARACTERISTICS: Solum thickness ranges from 40 to more than 60 inches. Depth to hard bedrock is more than 60 inches. Rock fragments of quartzite range from 5 to 20 percent in the A, Ap, and BA horizons, 5 to 30 percent in the Bt and BC horizons, and 30 to 60 percent in the C horizon. Reaction is extremely acid through strongly acid.
The A or Ap horizon has hue of 5YR through 10YR, value of 3 through 5, and chroma of 2 through 6. It is fine sandy loam, loam, or silt loam in the fine earth fraction.
The BA horizon has hue of 5YR or 7.5YR, value of 3 through 5, and chroma of 2 through 6. It is fine sandy loam, loam, or silt loam in the fine earth fraction.
The Bt horizon has hue of 2.5YR through 7.5YR, value of 4 through 6, and chroma of 4 through 8. It is loam, silt loam, silty clay loam, clay loam, or sandy clay loam in the fine earth fraction.
The BC horizon has hue of 2.5YR through 7.5YR, value of 4 through 6, and chroma of 4 through 8. Some pedons have variegated colors. It is loam to clay in the fine earth fraction.
The C horizon is commonly variegated in hues of red, brown, and yellow. It is sandy loam to clay in the fine earth fraction.
COMPETING SERIES: These are the Albemarle, Allegheny, Allenwood, Arcola, Aura, Bedington, Birdsboro, Brasstown, Bucks, Chester, Chetwynd, Chilmark, Clymer, Collington, Cowee, Edgemont, Edneytown, Elsinboro, Eubanks, Fernhaven, Frankstown, Freehold, Gilpin, Gladstone, Glenelg, Junaluska, Lonon, Matapeake, Meadowville, Murrill, Nixon, Pigeonroost, Pineville, Quakertown, Rayne, Sauratown, Shelocta, Shouns, Syenite, Tate, Thurmont, Ungers, and Whiteford series. Allegheny, Clymer, Edgemont, Gladstone, Pigeonroost, Pineville, Rayne, Shelocta, and Tate soils have argillic horizons with hues yellower than 7.5YR. Albemarle, Arcola, Brasstown, Bucks, Cowee, Gilpin, and Junaluska soils have lithic or paralithic contacts at less than 60 inches from the surface. Aura, Matapeake, Meadowville, Murrill, and Thurmont soils have a lithologic discontinuity between 25 and 60 inches. Birdsboro, Elsinboro, and Nixon soils formed in transported parent materials and have stratified substrata. Allenwood soils have granitic rock fragments. Bedington and Chetwynd soils have soil reaction ranging to neutral. Chester and Glenelg soils have micaceous schist. Chilmark, Edneytown, and Quakertown soils have sol less than 40 inches thick. Collington and Freehold soils have sola less than 40 inches thick and have glauconite. Whiteford soils have fragments of hard black shale. Unger soils have higher rock fragment content throughout the profile. Syenite soils have a loess cap. Shouns soils have shale fragments. Sauratown soils have E horizons with hue of 10YR or 2.5Y. Frankstown soils have less than 20 percent sand in the argillic. Fernhaven soils have mean annual precipitation ranging from 60 to 90 inches. Lonon soils formed in transported material above 1200 feet.
GEOGRAPHIC SETTING: Leedsville soils are on upland hills and ridges in the Culpeper Basin. They formed in residuum from Triassic-Jurassic interbedded sandstone and conglomerate. Slopes range from 2 to 15 percent. Mean annual temperature ranges from 50 to 57 degrees F. Mean annual precipitation ranges from 35 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Sudley, Oatlands, Manassas, Panorama, Arcola, Evergreen, Rowland, and Bowmansville soils. Arcola, Bowmansville, Evergreen, Manassas, and Rowland soils are not well drained. Panorama soils have less rock fragments in the soil. Oatlands soils have bedrock at 20 to 40 inches. Sudley soils have yellower hue and higher gravel content.
DRAINAGE AND PERMEABILITY: Well drained. Runoff is slow to rapid. Permeability is moderate.
USE AND VEGETATION: Most areas are in upland hardwood woodland. Some areas have been developed for residential use. Some areas are in hay production. A small area is cultivated, with corn and soybeans the main crops.
DISTRIBUTION AND EXTENT: Virginia, and possibly Maryland and Pennsylvania. The series is of small extent
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Loudoun County, Virginia, 2004.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
1. Ochric epipedon-zone from the surface to 10 inches (Ap and BA horizons)
2. Argillic horizon-zone from 10 to 46 inches (Bt horizon)
ADDITIONAL DATA: Five pedons: Mechanical and mineralogical analysis performed by Loudoun County Department of Natural Resources; Chemical analysis by VPI&SU.
MLRA=148
SIR=VA0367
REVISED=9/97,RRD
10/2003 Added active cation-exchange activity class based on associated soils. Previously revised by JMG-ELC-ACB.