LOCATION BRUMBAUGH VA MD+PAEstablished Series
TAXONOMIC CLASS: Fine-loamy, mixed, semiactive, mesic Oxyaquic Hapludults
TYPICAL PEDON: Brumbaugh cobbly silt loam from an area of Brumbaugh cobbly silt loam, in a field. (Colors are for moist soils.)
Ap-- 0 to 7 inches; brown (7.5YR 4/4) cobbly silt loam; weak fine granular structure; friable, slightly sticky, non-plastic; common very fine and fine roots; 15 percent cobbles and 5 percent gravel; few very fine and fine mica flakes; strongly acid; clear smooth boundary. (1 to 7 inches thick.)
Bt1-- 7 to 27 inches; reddish yellow (7.5YR 6/6) gravelly loam; moderate, medium subangular blocky structure; friable, slightly sticky, non-plastic; many very fine and fine roots; many, medium, faint clay films on faces of peds; few, fine flakes of mica; 15 percent gravel; strongly acid; clear, smooth boundary.
Bt2-- 27 to 32 inches; brown (7.5YR 5/4) gravelly loam; moderate, medium subangular blocky structure; friable, slightly sticky, slightly plastic; many fine and very fine roots; few, fine, distinct yellow (10YR 7/6) soft masses of iron accumulation; few, medium, distinct light brownish gray (10YR 6/2) redoximorphic depletions; common, medium, faint clay films on faces of peds; 15 percent gravel; very strongly acid; clear wavy boundary.
Bt3-- 32 to 51 inches; strong brown (7.5YR 5/6) clay loam; moderate medium subangular blocky structure; friable, sticky, slightly plastic; few very fine roots; common, medium, distinct yellowish red (5YR 5/6) and red (2.5YR 4/8) soft masses of iron accumulation; few, fine, distinct pale brown (10YR 6/3) and grayish brown (10YR 5/2) redoximorphic depletions; common, fine, prominent black (N 2/0) manganese stains; few, medium, faint clay films on faces of peds; 5 percent gravel; strongly acid; clear smooth boundary. (combined thickness of the Bt horizon is 30 to 60 inches)
2Bt4--51 to 65 inches; yellowish red (5YR 5/6) gravelly silty clay loam; moderate medium subangular blocky structure; friable, sticky, slightly plastic; few very fine roots; many, medium, distinct red (2.5YR 4/8), brownish yellow (10YR 6/8), and strong brown (7.5YR 5/8) soft masses of iron accumulation; many, medium, distinct gray (10YR 5/1) redoximorphic depletions; 25 percent gravel; strongly acid. (thickness of the 2Bt horizon is 10 to 30 inches)
TYPE LOCATION: Loudoun County, Virginia, 1000 feet west of state route VA-626.
RANGE IN CHARACTERISTICS: Solum thick ranges from 60 inches to more than 82 inches. Depth to bedrock ranges from 5 feet to more than 20 feet. Depth to mottling ranges from 12 to 24 inches. Depth to the discontinuity ranges from 30 to 60 inches. Rock fragment content ranges from 5 to 50 percent in individual horizons of the A and B but averages less than 35 percent. The 2B horizon rock fragment content ranges from 2 to 50 percent. Where unlimed the soil ranges from strongly acid to extremely acid throughout.
The A or Ap horizon has hue of 10YR or 7.5YR, value of 2 through 5 and chroma of 1 to 4. Texture is loam, silt loam, or fine sandy loam, with gravelly or channery analogues. Some pedons include sandy loam textures in the surface.
The E horizon, where present, has hue of 10YR or 7.5, value of 2 through 6 and chroma of 3 through 6. Texture is silt loam, loam, or fine sandy loam with gravelly or channery analogues. Some pedons include sandy loam textures in the subsurface.
The Bt horizon has hue of 10YR, 7.5YR and 5YR, value of 5 or 6 and chroma of 3 to 8. It is silt loam, loam, clay loam or silty clay loam with gravelly or channery analogues.
The 2Bt horizon has hue of 7.5YR to 2.5YR, value of 4 to 6 and chroma of 4 to 8. It is clay loam, clay or silty clay loam, with gravelly or channery analogues.
The 2BC horizon, where present, has hue of 7.5YR to 2.5YR, value of 4 to 6 and chroma of 4 to 8. It is clay loam, clay or silty clay loam, with gravelly or channery analogues.
COMPETING SERIES: These are the Birdsboro, Hassler, and Roselle series. Birdsboro soils are on stream terraces and lack a discontinuity. Hassler soils are less than 60 inches to a lithic contact and have a discontinuity into residual material. Roselle soils are formed in colluvium and alluvium, shallower to the discontinuity, and are sandier in texture below the discontinuity.
GEOGRAPHIC SETTING: Brumbaugh soils are on nearly level to steep soils on the colluvial footslopes of ridges and along drainageways. Slopes range from 0 to 35 percent. The colluvium is loamy in the upper part and clayey in the lower part. Slopes are lobed or undulating. The colluvium is derived from mixed acidic and basic metamorphic rocks. Average annual precipitation is 35 to 50 inches. Mean annual temperature is 47 to 56 degrees F and the growing season is 100 to 150 days.
GEOGRAPHICALLY ASSOCIATED SOILS: The Braddock soils are on similar colluvial footslopes and are well drained. Catoctin soils are on the adjacent backslopes and are moderately deep and loamy-skeletal. Scattersville soils are lower on the footslope and somewhat poorly drained. Myersville and Purcellville soils are on the adjacent backslopes and summits and have more than 35 percent base saturation.
DRAINAGE AND PERMEABILITY: Moderately well drained. Runoff is medium to rapid and permeability is moderate in the upper part of the solum to slow in the lower part.
USE AND VEGETATION: Stony and moderately steep to steep areas are in mixed hardwoods. Nonstony and nearly level to sloping areas are largely cleared and used for general dairy farming and pasture.
DISTRIBUTION AND EXTENT: Virginia, Pennsylvania; possibly Maryland and West Virginia. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Loudoun County, Virginia, 2004.
REMARKS: Series is closely related to the Buchanan Series but occurs in colluvium too clayey to exhibit all the properties of a fragipan. Some pedons could possibly classify as Paleudults if the clay content does not decrease above the lithologic discontinuity.
Series was proposed in Bedford County, Pennsylvania. The name is taken from a small locality in that county.
ADDITIONAL DATA: Penn State Soil Characterization Lab Pedon numbers: 5-31 and 5-33.