LOCATION ARNOT NY PAEstablished Series
TAXONOMIC CLASS: Loamy-skeletal, mixed, active, mesic Lithic Dystrudepts
TYPICAL PEDON: Arnot channery silt loam, on a 6 percent slope in an idle area. (Colors are for moist soil unless specified otherwise.)
Ap-- 0 to 6 inches; very dark grayish brown (10YR 3/2), light brownish gray (10YR 6/2) dry, channery silt loam; weak medium and fine granular structure; friable; many fine and medium roots; 20 percent rock fragments; strongly acid; abrupt smooth boundary. (2 to 10 inches thick.)
Bw1-- 6 to 15 inches; dark yellowish brown (10YR 4/4) very channery silt loam; weak fine and medium subangular blocky parting to weak fine granular structure; friable; many fine and medium roots; 35 percent rock fragments; strongly acid; abrupt smooth boundary.
Bw2-- 15 to 17 inches; light olive brown (2.5Y 5/4) very channery silt loam; weak thin platy structure; friable; common fine roots; many fine pores; 50 percent rock fragments; few medium faint yellowish brown (10YR 5/6) soft masses of iron accumulation; strongly acid; abrupt smooth boundary. (Combined thickness of the Bw horizons is 2 to 16 inches thick.)
2R-- 17 inches; gray (5Y 5/1) fine grained sandstone bedrock.
TYPE LOCATION: Cortland County, New York; Town of Truxton, 2 1/4 miles south east of Crain Mills at junction of roads running west-southwest and west-northwest. USGS Cuyler, NY topographic quadrangle; Latitude 42 degrees, 41 minutes, 0 seconds N. and Longitude 75 degrees, 59 minutes, 2 seconds W. NAD 1927.
RANGE IN CHARACTERISTICS: Solum thickness and depth to bedrock range from 10 to 20 inches. Rock fragments of dominantly sandstone, siltstone, or shale range from 35 to 70 percent as a weighted average of the particle-size control section. Texture of the fine-earth fraction is silt loam or loam throughout the profile. Reaction in unlimed areas ranges from extremely acid through moderately acid throughout the profile.
The A or Ap horizon has hue of 5YR through 2.5Y, or is neutral, value of 2 through 4, and chroma of 0 through 3. Dry colors have the same hue with value of 5 or 6 and chroma of 2 through 4. Structure is weak or moderate granular. Consistence is very friable or friable. Some pedons have a very friable or friable E horizon 1 to 3 inches thick with grayish colors.
The B horizon has hue of 2.5YR through 2.5Y, value of 4 through 6, and chroma of 3 through 6. Structure is very weak to moderate, fine or medium, subangular blocky; granular; or weak thin or medium platy. Consistence is friable or firm. Some pedons have few or common redoximorphic features in the lower part.
Some pedons have a C or 2Cr horizon that can range to 80 percent rock fragments.
The 2R horizon is hard sandstone, siltstone or shale. The bedding is horizontal and in many places the rock types are interbedded.
COMPETING SERIES: The Klinesville, Nassau, Sylvatus, and Weikert series are members of the same family. Klinesville soils are residual soils formed predominantly in red shale. Nassau soils have rock fragments dominated by shale or slate. Sylvatus soils are dominated by fragments of phylitte and slate and have a warmer soil temperature. Weikert soils have kaolinite as a significant component of the clay fraction.
GEOGRAPHIC SETTING: Arnot soils developed in a thin mantle of till of Wisconsin age. The till is derived mainly from acid sandstone, siltstone, and shale. In some places the regolith is a mixture of till and residuum. Slope ranges from 0 to 70 percent. The climate is humid and temperate. Mean annual precipitation ranges from 35 to 45 inches; mean annual temperature ranges from 45 to 50 degrees F.; and mean annual frost-free period ranges from 120 to 180 days. Elevation ranges from 1000 to 1800 feet above sea level.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Bath, Cadosia, Chippewa, Lackawanna, Lordstown, Maplecrest, Mardin, Morris, Oquaga, Tuller, Valois, Volusia and Wellsboro soils. Bath, Cadosia, Chippewa, Maplecrest, Mardin, Lackawanna, Morris, Valois, Volusia and Wellsboro soils developed in deep glacial till. Lordstown and Oquaga soils are moderately deep. Tuller soils are somewhat poorly to poorly drained.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Somewhat excessively drained to moderately well drained. The potential for surface runoff is medium to very high. Saturated hydraulic conductivity in the mineral soil is moderately high or high.
USE AND VEGETATION: Mainly forested. Some areas remain in rough pasture and hay land. Native vegetation is oak, beech, sugar maple, black cherry, hemlock, and white pine.
DISTRIBUTION AND EXTENT: The glaciated Allegheny Plateau and Catskills of New York, and northern Pennsylvania. MLRA 101 and 140. The series is of large extent.
MLRA OFFICE RESPONSIBLE: Amherst, Massachusetts.
SERIES ESTABLISHED: Cortland County, New York, 1957.
REMARKS: The Arnot series is considered to be the lithic analogue of the Lordstown and Oquaga series.
Diagnostic horizons and other features associated with the typical pedon are:
1. Ochric Epipedon - the zone from the surface to 6 inches (Ap horizon).
2. Cambic horizon - the zone from 6 to 17 inches (Bw horizons).
3. Lithic subgroup - as evidenced by bedrock at 17 inches.