LOCATION VAUGHN AREstablished Series
TAXONOMIC CLASS: Coarse-loamy, siliceous, semiactive, thermic Typic Hapludalfs
TYPICAL PEDON: Vaughn gravelly loamy sand, 0 to 3 percent slopes, occasionally flooded in woodland. (Colors are for moist soil unless otherwise stated.)
A--0 to 8 cm (0 to 3 in); dark grayish brown (10YR 4/2) gravelly loamy sand; weak medium granular structure; very friable; about 15 percent by volume well-rounded sandstone gravel; moderately acid; clear smooth boundary.
BA--8 to 25 cm (3 to 10 in); yellowish brown ( 10YR 5/4) gravelly sandy loam, weak fine and medium granular structure; very friable; about 15 percent by volume well-rounded sandstone gravel; strongly acid; clear wavy boundary.
Bt--25 to 69 cm (10 to 27 in); reddish yellow (7.5YR 6/6) gravelly sandy loam; weak fine and medium subangular blocky structure; friable; few fine faint patch clay films on lower faces of peds; about 15 percent by volume well-rounded sandstone gravel;very strongly acid; clear wavy boundary.
2BC--69 to 112 cm (27 to 44 in); brown (7.5YR 5/4) very gravelly loamy sand; weak fine subangular blocky structure parting to weak fine and medium granular structure; friable; about 40 percent by volume well rounded sandstone gravel and about 10 percent by volume well-rounded sandstone cobbles; strongly acid.
2C--112 to 203 cm (44 to 80 in); brown (7.5YR 5/4) very gravelly loamy sand; weak fine subangular blocky structure parting to weak fine and medium granular structure; friable; about 40 percent by volume well rounded sandstone gravel and about 10 percent by volume well-rounded sandstone cobbles; strongly acid.
TYPE LOCATION: Pike County, Arkansas; Along Clear Creek about 4 miles southwest of Stelltown; NE14, NE1/4, NW1/4 Section. 25, T.8 S., R.25 W.; DELIGHT USGS topographic quadrangle; Latitude: 34 degrees, 1 minutes, 33.29 seconds N., Longitude: 93 degrees, 37 minutes, 18.53 seconds W.
RANGE IN CHARACTERISTICS:
Solum thickness: 76 to more than 152 cm (30 to more than 60 in)
Depth to the 2BC horizon: 51 to 102 cm (20 to 40 in)
Reaction ranges from medium acid to strongly acid in the A and BA horizons and strongly acid to extremely acid in the Bt, 2BC, and 2C horizons.
A horizon
Hue of 10YR
Value of 3 or 4
Chroma of 2 through 4
OR
Hue of 7.5YR
Value of 4
Chroma of 4
Fine-earth: loamy fine sand, loamy sand, fine sandy loam, sandy loam or their gravelly analogs
Rock Fragments: 0 to 35 percent, predominantly gravel size
BA horizon
Hue of 7.5YR
Value of 4 or 5
Chroma of 5 or 6
OR
Hue of 10YR
Value of 4 or 5
Chroma of 4 to 8
OR
hue of 10YR
Value of 5
Chroma of 6 or 8
Fine-earth: loamy sand, loamy fine sand, sandy loam, fine sandy loam, or their gravelly analogs.
Rock Fragments: 0 to 35 percent, predominantly gravel size
Bt horizon(s)
Hue of 7.5YR
Value of 4 or 5
Chroma of 6 or 8
OR
Hue of 10YR
Value of 4 or 5
Chroma of 4 to 8
OR
Hue of 10YR
Value of 5
Chroma of 6 or 8
OR
Hue of 5YR
Value of 4 or 5
Chroma 4 to 8
Fine-earth: sandy loam, fine sandy loam, loamy fine sand or their gravelly analogs.
Rock Fragments: 0 to 35 percent, predominantly gravel size
2BC horizon
Hue of 10YR
Value of 3 or 4
Chroma of 2 through 4
OR
Hue of 7.5YR
Value of 4 or 5
Chroma of 4
Fine-earth: gravelly loamy fine sand, gravelly loamy sand, gravelly sandy loam, cobbly loamy fine sand, cobbly loamy sand, cobbly sandy loam, or their very gravelly or very cobbly analogs.
Rock Fragments: 35 to 60 percent, predominantly gravel size
The 2C horizon, where present
Hue of 10YR
Value of 3 or 4
Chroma of 2 through 4
OR
Hue of 7.5YR
Value of 4 or 5
Chroma of 4 or 6
Fine-earth: very gravelly loamy fine sand, very gravelly loamy sand, very cobbly loamy fine sand, very cobbly loamy sand, or their extremely gravelly or extremely cobbly analogs.
Rock Fragments: 35 to 90 percent
COMPETING SERIES: No competing series in the same taxonomic class.
GEOGRAPHIC SETTING: Vaughn soils are on flood plains of the Cretaceous Western Coastal Plain, MLRA 135B and in the transitional area to the Ouachita Mountains, MLRA 119. They formed in loamy and gravelly alluvium. Slopes range from 0 to 3 percent. Mean annual precipitation ranges from 45 to 55 inches. Mean annual temperature ranges from 63 degrees to 75 degrees F. Thornthwaite annual P-E indices are greater than 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Gurdon,
Guyton,
Murfreesboro,
Ochlockonee,
Ouachita and Pikecreek soils.
Gurdon soils are on similar landscapes and are somewhat poorly drained.
Guyton soils are on lower landscape positions and are poorly drained.
Murfreesboro soils on higher stream terrace positions and have a fine-loamy control section.
Ochlockonee are on similar landscape positions but lack an argillic horizon.
Ouachita soils have a fine-silty control section and lack an argillic horizon.
Pikecreek soils are on similar landscapes and have a sandy-skeletal control section.
DRAINAGE AND PERMEABILITY: Vaughn soils are well drained. Runoff is negligible to low and permeability is moderately.
USE AND VEGETATION: Used mainly for native pasture and woodland. The vegetation is primarily southern red oak, sweetgum, American sycamore, white oak, and loblolly pine.
DISTRIBUTION AND EXTENT: Cretaceous Western Gulf Coastal Plain of southwest Arkansas and possibly southeast Oklahoma. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Pike County, Arkansas; 2004
REMARKS: These soils were formerly included in the Ceda, Kenn and Toine series.
Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - 0 to 25 cm (0 to 10 in)
Argillic horizon - 25 to 69 cm (10 to 27 in)
ADDITIONAL DATA: Characterization of the typical pedon by the National Soil Survey Laboratory - S01AR-109-01.
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