LOCATION STANHOPE OH+PA
Established Series
STP-JRS
06/2011
STANHOPE SERIES
The Stanhope series consists of very deep, poorly drained soils formed in alluvium on flood plains. Permeability is moderate to moderately slow. Slope ranges from 0 to 2 percent. Mean annual precipitation is about 36 inches, and mean annual temperature is about 50 degrees F.
TAXONOMIC CLASS: Fine-silty, mixed, active, nonacid, mesic Fluvaquentic Endoaquepts
TYPICAL PEDON: Stanhope silt loam, 0 percent slope in mixed hardwoods at an elevation of about 940 feet above msl. (Colors are for moist soil unless otherwise noted.)
A -- 0 to 5 inches; dark grayish brown (10YR 4/2) silt loam, light brownish gray (10YR 6/2) dry; weak fine and medium granular structure; friable; many very fine to medium roots throughout; very strongly acid (pH 4.8); clear wavy boundary. (3 to 10 inches thick.)
Bg1 -- 5 to 10 inches; grayish brown (10YR 5/2) silt loam; weak fine subangular blocky structure; friable; common very fine to medium and few very coarse roots throughout; common (10 percent) fine and medium distinct yellowish brown (10YR 5/6) and common (15 percent) fine prominent strong brown (7.5YR 5/6) masses of iron oxide accumulation in the matrix; common fine black (10YR 2/1) iron-manganese oxide accumulations throughout; very strongly acid (pH 4.6); clear wavy boundary.
Bg2 -- 10 to 21 inches; gray (10YR 6/1) silt loam; moderate fine and medium subangular blocky structure; friable; common very fine to medium and few very coarse roots throughout; few distinct gray (10YR 6/1) iron-depleted coats on vertical faces of peds; many (40 percent) medium prominent yellowish brown (10YR 5/6) and common (10 percent) fine prominent strong brown (7.5YR 5/8) masses of iron oxide accumulation in the matrix; very strongly acid (pH 4.8); clear wavy boundary. (Combined thickness of the Bg horizon is 9 to 16 inches.)
Bw -- 21 to 40 inches; yellowish brown (10YR 5/6) silt loam; moderate coarse subangular blocky structure; friable; few very fine, fine, and very coarse roots throughout; very few prominent gray (10YR 6/1) iron-depleted coats on vertical faces of peds; many (35 percent) medium distinct light brownish gray (10YR 6/2) areas of iron depletion in the matrix; common fine and medium prominent strong brown (7.5YR 5/8) masses of iron oxide accumulation in the matrix and common fine prominent red (2.5YR 4/6) masses of iron oxide accumulation lining pores; strongly acid (pH 5.3); clear wavy boundary. (10 to 24 inches thick.)
C1 -- 40 to 48 inches; yellowish brown (10YR 5/4) stratified silt loam and silty clay loam; massive; friable; few very fine and coarse roots throughout; many (30 percent) medium distinct gray (10YR 6/1) areas of iron depletion in the matrix; common fine and medium prominent strong brown (7.5YR 5/6) and fine prominent red (2.5YR 4/6) masses of iron oxide accumulation in the matrix; few fine dark brown (7.5YR 3/2) iron-manganese oxide accumulations throughout; slightly acid (pH 6.3); clear wavy boundary.
C2 -- 48 to 74 inches; reddish brown (5YR 4/4) stratified silt loam and silty clay loam; many (35 percent) fine and medium prominent gray (N 6/0) and many (25 percent) medium prominent light olive brown (2.5Y 5/4) mottles; massive; firm; few fine roots throughout; common fine and medium prominent strong brown (7.5YR 5/6) masses of iron oxide accumulation in the matrix; neutral (pH 6.7); clear wavy boundary.
Cg -- 74 to 80 inches; greenish gray (5G 6/1) silt loam; common fine prominent strong brown (7.5YR 5/8) mottles; massive; firm; slightly acid (pH 6.3).
TYPE LOCATION: Ashtabula County, Ohio; about 3 miles northeast of Wayne, in Wayne Township, 2,225 feet west of the intersection of Creek Road (County Road 149) and Woodworth Road (Township Road 90), then 130 feet south. T. 8 N., R. 2 W; USGS Cherry Valley, OH topographic quadrangle; Latitude 41 degrees, 34 minutes, 15 seconds N. and Longitude 80 degrees, 37 minutes, 57 seconds W., NAD 1927.
RANGE IN CHARACTERISTICS: Thickness of the solum ranges from 25 to 50 inches. Depth to carbonates is deeper than 80 inches.
The A horizon has hue of 10YR, value of 3 or 4, and chroma of 1 to 3. Structure is weak or moderate, fine or medium, granular. Reaction is very strongly acid to moderately acid.
The Bg horizon has hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 1 or 2. Texture is silt loam or silty clay loam. Structure is weak or moderate, fine or medium, subangular blocky. Reaction is very strongly acid to moderately acid.
The Bw horizon has hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 3 to 6. Texture is silt loam or silty clay loam. In some pedons strata of sandy loam, fine sandy loam, loamy fine sand or fine sand are below 40 inches. Structure is weak or moderate, fine to coarse, subangular blocky. Reaction is very strongly acid to slightly acid.
The C horizon has hue of 5YR to 2.5Y, N or is 5G in lower parts, value of 4 to 6, and chroma of 0 to 6. Texture is silt loam or silty clay loam. In some pedons strata of sandy loam, fine sandy loam, loamy fine sand or fine sand are below 40 inches. Rock fragments range from 0 to 20 percent below 40 inches. Reaction is strongly acid to neutral.
COMPETING SERIES: The
Melvin,
Rahm, and
Wayland series are in the same family. Melvin soils have a greater mean annual temperature. Rahm soils have a buried horizon within 20 to 36 inches. Wayland soils have carbonates in the series control section.
Similar series are the
Aetna and
Newark soils. Aetna soils have a buried mollic epipedon. Newark soils have mean annual temperatures ranging from 52 to 57 degrees F.
GEOGRAPHIC SETTING: Stanhope soils formed in alluvium from areas of Wisconsinan age low-lime till and lacustrine sediments and are on flood plain steps on flood plains. Slope ranges from 0 to 2 percent. Mean annual temperature ranges from 47 to 52 degrees F., and mean annual precipitation ranges from 29 to 43 inches. The frost free period is 133 to 198 days, and elevation ranges from 570 to 1,100 feet above msl.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Blakeslee,
Cambridge,
Chenango,
Darien,
Mill,
Otego, Red Hook,
Venango and
Wick soils. The moderately well drained Cambridge soils, somewhat poorly drained Darien and Venango soils, and poorly drained Mill soils are on adjacent till plains. The somewhat excessively drained Chenango soils, moderately well drained Blakeslee soils, and somewhat poorly drained Red Hook soils are on adjacent outwash plains. The moderately well drained Otego soils occupy higher positions on the flood plain. The very poorly drained Wick soils occupy depressional areas on the flood plain.
DRAINAGE AND PERMEABILITY: Poorly drained. The potential for surface runoff is low to medium. Permeability is moderate or moderately slow. Stanhope soils are subject to frequent flooding for brief durations. Depth to the top of an intermittent apparent seasonal high water table is +0.5 to 0.5 foot from November to June in normal years.
USE AND VEGETATION: Most areas are wooded. Natural vegetation is deciduous forest.
DISTRIBUTION AND EXTENT: Northeastern Ohio and limited areas of northwestern pennsylvania. MLRA 139. The series is of small extent, about 8,300 acres.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Amherst, Massachusetts.
SERIES ESTABLISHED: Ashtabula County, Ohio, 2001.
REMARKS: Soils that were mapped as Orrville fine sandy loam, and as Orrville silt loam, classified as Fine-loamy, mixed, nonacid, mesic Aeric Fluvaquents in the Soil Survey of Ashtabula County, Ohio, published 1973, were correlated to the Stanhope series during the modernization project of that survey.
Diagnostic horizons and features in this pedon include:
Ochric epipedon - from a depth of 0 to 10 inches (A and Bg1 horizons).
Cambic horizon - from a depth of 5 to 40 inches (Bg1, Bg2
and Bw horizons).
Aquic conditions - from a depth of 5 to 80 inches.
Udic moisture regime.
ADDITIONAL DATA: Refer to pedon AB-129 for characterization data on the typical pedon, sample numbers 27065 to 27078, from Ashtabula County, Ohio; samples analyzed by the Ohio State University Soil Characterization Laboratory, Columbus, Ohio.
National Cooperative Soil Survey
U.S.A.