LOCATION LONGSHOAL NC
Established Series
Rev. JAG-JAK-RBT/MCR
09/2023
LONGSHOAL SERIES
Depth class--Very deep
Drainage--Very poorly drained
Saturated Hydraulic Conductivity--Moderately high to high
Parent Material--Thick herbaceous and woody organic materials underlain by fluviomarine deposits
Geomorphic location--Brackish low-lying tidal salt marsh platforms
Slope range for Series--Less than 1 percent
Mean Annual temperature--17 degrees C (62 degrees F)
Mean Annual precipitation--1,346 millimeters (53 inches)
TAXONOMIC CLASS: Euic, thermic Typic Haplosaprists
TYPICAL PEDON: Longshoal mucky peat, on a nearly flat saltwater tidal marsh--wildlife habitat.(Colors are for moist soil unless otherwise stated.)
Oese--0 to 42 centimeters; very dark brown (10YR 2/2) broken face and rubbed, mucky peat; about 30 percent fiber unrubbed, 20 percent fiber rubbed; H5 von Post humification; many fine, medium, and coarse roots; moderate sulfurous odor; neutral (6.86 pH, 1:1 water), strongly acid (5.34 pH, 1:1 water) after moist incubation; electrical conductivity (4.88 dS/m, 1:5 water); clear smooth boundary. (0 to 45 centimeters thick)
Oase1--42 to 65 centimeters; black (10YR 2/1) broken face and rubbed, muck; about 20 percent fiber unrubbed, 10 percent fibers rubbed; H7 von Post humification; many fine roots, common medium and coarse roots; moderate sulfurous odor; neutral (6.78 pH, 1:1 water), moderately acid (5.57 pH, 1:1 water) after moist incubation; electrical conductivity (6.16 dS/m, 1:5 water); gradual smooth boundary.
Oase2--65 to 90 centimeters; very dark brown (10YR 2/2) broken face and rubbed, muck; about 25 percent fibers unrubbed, 10 percent rubbed; H7 von Post humification; common fine and medium roots; moderate sulfurous odor; neutral (6.79 pH, 1:1 water), strongly acid (5.12 pH, 1:1 water) after moist incubation; electrical conductivity (6.12 dS/m, 1:5 water); clear smooth boundary.
Oase3--90 to 114 centimeters; black (2.5Y 2.5/1) broken face and rubbed, muck; about 10 percent fibers unrubbed, 3 percent rubbed; H9 von Post humification; common fine and medium roots; moderate sulfurous odor; neutral (6.73 pH, 1:1 water), strongly acid (5.01 pH, 1:1 water) after moist incubation; electrical conductivity (6.27 dS/m, 1:5 water); gradual smooth boundary.
O'ese--114 to 137 centimeters; very dark brown (10YR 2/2) broken face and rubbed, mucky peat; about 35 percent fibers unrubbed, 25 percent rubbed; H5 von Post humification; few fine roots; moderate sulfurous odor; neutral (6.80 pH, 1:1 water), very strongly acid (4.87 pH, 1:1 water) after moist incubation; electrical conductivity (5.12 dS/m, 1:5 water); clear smooth boundary.
O'ase--137 to 162 centimeters; black (10YR 2/1) broken face and rubbed, muck; about 15 percent fibers unrubbed, 5 percent rubbed; H7 von Post humification; few fine roots; strong sulfurous odor; neutral (6.66 pH, 1:1 water), extremely acid (4.30 pH, 1:1 water) after moist incubation; electrical conductivity (5.40 dS/m, 1:5 water); gradual smooth boundary. (Combined thickness of O horizons is 130 to 200 centimeters thick)
Ase1--162 to 190 centimeters; black (2.5Y 2.5/1) mucky sandy loam; weak fine subangular blocky structure; friable; very fluid; few fine roots; strong sulfurous odor; neutral (6.65 pH, 1:1 water), moderately acid (5.56 pH, 1:1 water) after moist incubation; electrical conductivity (6.46 dS/m, 1:5 water); gradual smooth boundary.
Ase2--190 to 215 centimeters; black (10YR 2/1) sandy loam; weak fine subangular blocky structure; friable; moderately fluid; few fine roots; slight sulfurous odor; neutral (6.71 pH, 1:1 water), extremely acid (3.79 pH, 1:1 water) after moist incubation; electrical conductivity (4.18 dS/m, 1:5 water). (Combined thickness of the Ase horizons is 0 to 50 centimeters thick.)
TYPE LOCATION: Hyde County, North Carolina; in Swanquarter approximately 1.2 miles west of the intersection of Main Street and North Carolina Highway 45, and approximately 65 feet due west of Shingle Creek in a marsh within Swanquarter National Wildlife Refuge; Swanquarter USGS topographic quadrangle.
Latitude--35.407061
Longitude-- -76.350947
Datum--WGS84
Coordinates source--from hand-held GPS
RANGE IN CHARACTERISTICS:
Thickness of the O horizons--more than 130 centimeters (greater than 51 inches)
Depth to Bedcock--Greater than 200 centimeters (80 inches)
Soil moisture--These soils have peraquic moisture conditions and are tidally flooded daily
Soil Reaction--Very strongly acid to moderately alkaline
Soil reaction after moist incubation--Extremely acid to moderately acid
Electrical Conductivity--greater than 2.0 dS/m
Oese and O'ese horizon (where present)
Hue--5YR to 5Y
Value--2 to 4
Chroma--1 or 2
Texture--mucky peat
Rubbed fiber--17 to less than 40 percent
Von Post--H4 to H6
Some pedons have mineral soil materials deposited from storm events within the surface tier. Some pedons also have thin layers of fibric (peat) materials.
Oase and O'ase horizon
Hue--5YR to 5Y
Value--2 to 3
Chroma--1 or 2
Texture--muck
Rubbed fiber--less than 17 percent
Von Post--H7 to H10
Some pedons have thin layers of loamy or sandy mineral soil materials
Ase or Aseg horizon (where present)
Hue--10YR to 5Y or Neutral
Value--2 to 4
Chroma--0 to 4
Texture--sandy, loamy, or clayey with mucky analogues (outside of the Organic tier control section)
Manner of failure--Very or moderately fluid.
Cseg horizon (where present)
Hue--10YR to 5BG or Neutral
Value--4 to 6
Chroma--0 to 2
Texture--sandy, loamy, or clayey (outside of the Organic tier control section)
Manner of failure-Moderately or nonfluid.
COMPETING SERIES: These are the
Hobonny,
Joice, and
Rindge series.
Hobonny soils--are directly influenced by freshwater and do not have sulfurous odors
Joice soils--have mean annual precipitation of less than 508 millimeters, have altered hydrology with significant variations and are along coastal areas of California.
Rindge soils--are in freshwater marshes, have mean annual precipitation of less than 508 millimeters and are often used for commodity crop production.
GEOGRAPHIC SETTING:
Parent material--thick herbaceous and woodyorganic materials underlain by fluviomarine deposits with depth
Landscape--Coastal plain
Landform--Brackish tidal marshes
Slope--1 percent or less
Elevation--2 feet or less
Mean annual precipitation--1,168 to 1,473 millimeters (46 to 58 inches)
Mean annual air temperature--14 to 21 degrees C (57 to 70 degrees F)
Water salinity range-5 to 30 parts per thousand
Frost-free period--360 to 365 days
GEOGRAPHICALLY ASSOCIATED SOILS:
These are the
Acredale,
Argent,
Backbay,
Brookman,
Delway, and the
Hydeland series.
Except for
Delway, all of these are mineral soils and are at higher elevations.
Delway soils--have organic layers 40 to 130 centimeters (16 to 51 inches) thick.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--Very poorly drained
Saturated Hydraulic Conductivity--Moderately high to high
Soil moisture regime-Peraquic
Soil has brackish water at or near the soil surface throughout the year.
USE AND VEGETATION:
Major uses--The soils are primarily utilized for wetland wildlife habitat.
Native vegetation--The vegetation is saltwater tolerant herbaceous plants and includes marshhay cordgrass, switchgrass, saltmarsh bulrush, saltmarsh cordgrass, saltmeadow cordgrass, olney bulrush, big cordgrass, and needlegrass rush (black needlerush).
DISTRIBUTION AND EXTENT:
General area--Coastal tidal marsh areas North Carolina and possibly South Carolina and Virginia.
Land Resource Region--T - Atlantic and Gulf Coast Lowland Forest and Crop Region
MLRA(s)-153B - Tidewater Area
Extent--Small
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Hyde County, North Carolina; 1996.
REMARKS: Longshoal soils were previously mapped with the Lafitte series (LA). The Lafitte series was reclassified as loamy, mixed, euic, hyperthermic Terric Medisaprists.
Diagnostic horizons and features recognized in this pedon--
Histosols (Typic)--have organic materials that total 40 cm or more between the soil surface and a depth of 50 centimeters and total thickness of organic materials exceeds 130 centimeters in depth - the zone from a depth of 0 to 162 cm (Oese, Oase1, Oase2, Oase3, O'ese, O'ase).
Hemic soil materials--the zone from the soil surface to 42 centimeters (0 to 16 inches) and 114 to 137 centimeters (45 to 54 inches). (Oese and O'ese horizons)
Sapric soil materials--the zone from 42 to 114 centimeters (16 to 45 inches) and 137 to 162 centimeters (54 to 64 inches). (Oase1, Oase2, Oase3 and O'ase horizons)
Peraquic conditions--continuous endosaturation with very frequent tidal flooding.
Hyposulfidic soil materials--sulfurous odors, and incubated pH decrease greater than 1.0 unit and remains above 4.0 the zone from the soil surface to 200 centimeters.
ADDITIONAL DATA: Reference data is available from NC State University, Raleigh, NC for the following pedons: S2020NC095006,S2020NC055009, and S2021VA810001.
Reference data is available from the Soil Survey Laboratory, Lincoln, NE for the following pedons: S1989NC095004; S1989NC095005; and S1989NC095006
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation
NC0295 LONGSHOAL 0- 1 57- 70 215-250 46- 58 0- 2
SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness
NC0295 FREQ - APPARENT - 60-60
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC-
NC0295 0-80 MPT MUCK 0- 0 - - 50- 95
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll
NC0295 0-80 4.5- 8.4 30-70 16-70 2.0- 20 LOW
________________________________________
National Cooperative Soil Survey
U.S.A.