LOCATION MONGAUP NY
Established Series
Rev. STS-WEH-ERS
01/2011
MONGAUP SERIES
The Mongaup series consists of moderately deep, well drained soils formed in till derived from sandstone, siltstone and shale. They are nearly level through very steep soils on hillsides and hilltops in glaciated, bedrock controlled uplands. Depth to hard bedrock is 20 to 40 inches. Slope ranges from 0 to 70 percent. Mean annual temperature is 44 degrees F. and mean annual precipitation is 45 inches.
TAXONOMIC CLASS: Coarse-loamy, mixed, active, frigid Typic Dystrudepts
TYPICAL PEDON: Mongaup loam, on a 4 percent slope in a forested area. (Colors are for moist soil unless noted otherwise.)
A -- 0 to 3 inches; dark reddish brown (5YR 3/2), pinkish gray (5YR 6/2) dry, loam; weak fine granular structure; friable; many fine and medium roots; 10 percent rock fragments; very strongly acid; abrupt wavy boundary. (2 to 6 inches thick.)
Bw1 -- 3 to 12 inches; yellowish red (5YR 5/6) gravelly loam; weak medium subangular blocky structure; friable; many fine and medium roots; few large roots; common fine and medium vesicular pores; a few medium tubular pores; 20 percent rock fragments; very strongly acid; clear wavy boundary.
Bw2 -- 12 to 18 inches; strong brown (7.5YR 5/6) gravelly loam; weak medium subangular blocky structure; friable; common fine and medium roots; few large roots; common fine and medium vesicular pores, few medium tubular pores; 20 percent rock fragments; strongly acid; clear smooth boundary. (Combined thickness of the Bw horizons is 7 to 34 inches.)
BC -- 18 to 22 inches; brown (7.5YR 4/4) sandy loam; weak coarse subangular blocky structure; friable; many fine and medium vesicular pores, common tubular pores; 10 percent rock fragments; common coarse distinct pale brown (10YR 6/3) and prominent reddish yellow (7.5YR 6/8) masses of iron accumulation; strongly acid. (0 to 10 inches thick.)
2R -- 22 inches; massive, hard grayish brown sandstone bedrock.
TYPE LOCATION: Sullivan County, New York, Town of Liberty. Along west side of Fox Mountain Road, 310 yards north of the intersection of Fox Mountain and Elk Point Roads. Elevation 2,020 feet. USGS Liberty West, NY topographic quadrangle; Latitude 41 degrees, 49 minutes, 48 seconds N. and Longitude 74 degrees, 48 minutes, 09 seconds W. NAD 1927.
RANGE IN CHARACTERISTICS: Thickness of solum and depth to bedrock ranges from 20 to 40 inches. Rock fragment content ranges from 5 to 35 percent in the upper part of the solum and up to 50 percent in the lower part of the soil. Unless limed, reaction is extremely acid to strongly acid in the surface layer upper part of the subsoil and extremely acid to moderately acid in the lower part of the subsoil and substratum.
The A or Ap horizon has hue of 5YR through 10YR, value of 2 through 4 and chroma of 0 through 4. It is sandy loam to silt loam in the fine earth fraction. Structure is weak or moderate granular or blocky. Consistence is friable or very friable. O or E horizons are present in some pedons. Where present, the Ap horizon can be up to 12 inches thick.
A BA horizon up to 6 inches thick is present in some pedons. The Bw and BC horizons have hue of 2.5YR through 2.5Y with value of 3 through 5 and chroma of 2 through 6. They are sandy loam to silt loam in the fine earth fraction. Structure is weak or moderate subangular blocky. Thin Bhs or Bs horizons may be present in some pedons. Some pedons lack redoximorphic features.
The C horizon, where present, is similar in color and texture to the B horizon. It is massive or has plate-like divisions.
The 2R layer is commonly hard, massive, horizontally-bedded sandstone but thinner beds of siltstone or shale underlie some pedons.
COMPETING SERIES: The
Bice,
Dummerston,
Elka,
Flatiron,
Haights,
Lombard, and
Millsite series are in the same family. Bice and Elka soils are more than 40 inches deep to bedrock. Dummerston soils are very deep to bedrock and has till derived from phyllite, schist, slate, and limestone bedrock. Flatiron soils are formed in residuum from
Olean and Knapp conglomerate and are very deep to bedrock. Haights soils are more than 40 inches deep to bedrock and are underlain by poorly sorted water deposited materials. Lombard soils are very deep to bedrock and have till over saprolite that is underlain by soft bedrock. Millsite series are moderately deep to crystiline bedrock.
GEOGRAPHIC SETTING: Mongaup soils are nearly level to very steep soils with slope ranging from 0 to 70 percent. These soils formed in acid till on bedrock controlled uplands. The climate is humid and is cool in summer and cold in winter. Annual air temperature ranges from 40 to 46 degrees F. Annual precipitation is 39 to 58 inches and the frost-free season ranges from about 100 to 130 days. Elevation ranges from 1000 to 2400 feet above sea level.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the shallow somewhat excessively drained
Halcott and the somewhat poorly drained
Tor soils, the moderately deep, moderately well drained,
Middlebrook soils, and very deep, moderately well drained
Willowemoc soils on nearby till uplands.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained. The potential for surface runoff is medium to very high. Saturated hydraulic conductivity is moderately high to high throughout the mineral soil.
USE AND VEGETATION: Small cleared areas are used for hay or pasture. Most areas are forested. Native trees include sugar maple, red maple, beach, black cherry, ash, birch and hemlock.
DISTRIBUTION AND EXTENT: Catskill Mountain area of east- central New York and higher elevations of the Appalachian Plateau in southern New York. MLRA 140. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Amherst, Massachusetts
SERIES ESTABLISHED: Sullivan County, New York, 1984.
REMARKS: Mongaup is the frigid equivalent of Lordstown. Original classification of Mongaup placed it in the subgroup Typic Dystrochrepts, but because of changes established in the 8th edition of "Keys To Soil Taxonomy", this soil now classifies in the subgroup of Typic Dystrudepts. Competing series are expected to change as similar soils are reclassified.
Diagnostic horizons and other features recognized in the typical pedon are:
(1) Ochric Epipedon - the zone from 0 to 3 inches (Ap horizon).
(2) Cambic horizon - the zone from 3 to 18 inches (Bw horizons).
(3) Udic soil moisture regime
(4) Estimate CEC activity class as active.
National Cooperative Soil Survey
U.S.A.