LOCATION CURRITUCK NC
Established Series
Rev. JHW:AG, MCR/RBT
09/2023
CURRITUCK SERIES
Depth Class--Very deep
Drainage Class--Very poorly drained
Saturated Hydraulic Conductivity Class--Moderately high to high
Parent Material--Herbaceous and woody organic materials underlain by sandy marine deposits
Geomorphic location--Estuarine fresh or oligohaline tidal marsh
Slope range for series--Less than 1 percent
Mean Annual Air Temperature: 17 degrees C. (63 degrees F.)
Mean Annual Precipitation: 1346 millimeters (53 inches)
TAXONOMIC CLASS: Sandy or sandy-skeletal, mixed, euic, thermic Terric Haplosaprists
TYPICAL PEDON: Currituck mucky peat, on an oligohaline tidal marsh. (Colors are for moist soil unless otherwise stated).
Oese--0 to 8 centimeters (0 to 3 inches); dark yellowish brown (10YR 3/4) broken face and rubbed, mucky peat; H5 von Post scale; 40 percent unrubbed fiber, 25 percent rubbed; many fine and medium roots, few coarse roots; slight sulfurous odor; slightly acid (6.50 pH, 1:1 water), moderately acid (5.77 pH, 1:1 water) after moist incubation; slightly effervescent with 30% hydrogen peroxide; electrical conductivity (1.89 dS/m, 1:5 water); clear smooth boundary. (0 to 25 centimeters thick)
Oase1--8 to 41 centimeters (3 to 16 inches); dark brown (10YR 3/3) broken face and rubbed, muck; H7 von Post scale; 35 percent unrubbed fiber, 10 percent rubbed; many fine and medium roots, few coarse roots; slight sulfurous odor; neutral (6.82 pH, 1:1 water), strongly acid (5.43 pH, 1:1 water) after moist incubation; slightly effervescent with 30% hydrogen peroxide; electrical conductivity (0.82 dS/m, 1:5 water); clear smooth boundary.
Oase2--41 to 81 centimeters (16 to 32 inches); dark brown (10YR 3/3) broken face and rubbed, muck; H7 von Post scale; 30 percent unrubbed fiber, 10 percent rubbed; common fine and medium roots; strong sulfurous odor; neutral (6.84 pH, 1:1 water), very strongly acid (5.03 pH, 1:1 water) after moist incubation; slightly effervescent with 30% hydrogen peroxide; electrical conductivity (1.20 dS/m, 1:5 water); clear smooth boundary.
Oase3--81 to 104 centimeters (32 to 41 inches); very dark brown (7.5YR 2.5/2) broken face and rubbed, muck; H8 von Post scale; 35 percent unrubbed fiber, 8 percent rubbed; few fine roots; strong sulfurous odor; neutral (6.98 pH, 1:1 water), strongly acid (5.44 pH, 1:1 water) after moist incubation; slightly effervescent with 30% hydrogen peroxide; electrical conductivity (2.35 dS/m, 1:5 water); clear smooth boundary.
Oase4--104 to 118 centimeters (41 to 46 inches); very dark brown (7.5YR 2.5/2) broken face and rubbed, muck; H8 von Post scale; 40 percent unrubbed fiber, 10 percent rubbed; few charcoal lenses in stratified layers; 1% wood fragments; strong sulfurous odor; neutral (7.06 pH, 1:1 water), moderately acid (5.95 pH, 1:1 water) after moist incubation; slightly effervescent with 30% hydrogen peroxide; electrical conductivity (2.04 dS/m, 1:5 water); clear smooth boundary. (40 to 130 centimeters thick)
Aseg--118 to 129 centimeters (46 to 51 inches); dark grayish brown (10YR 4/2) fine sandy loam; massive; friable; slightly fluid; nonsticky, nonplastic; strong sulfurous odor; neutral (6.88 pH, 1:1 water), moderately acid (pH 5.91, 1:1 water) after moist incubation; slightly effervescent with 30% hydrogen peroxide; electrical conductivity (2.79 dS/m, 1:5 water); clear smooth boundary. (0 to 15 centimeters thick)
Cseg--129 to 200 centimeters (51 to 79 inches); grayish brown (2.5Y 5/2) fine sand; massive; loose; nonfluid; nonsticky, nonplastic; strong sulfurous odor; common organic stains along root channels; many very fine mica flakes throughout; neutral (7.10 pH, 1:1 water), strongly acid (pH 5.46, 1:1 water) after moist incubation; slightly effervescent with 30% hydrogen peroxide; electrical conductivity (1.79 dS/m, 1:5 water). (70 to 160 cm thick)
TYPE LOCATION: Dare County, North Carolina; approximately 4,750 feet southeast of the Avon Beach Boat Ramp at the intersection of Dock Street and Bay Drive in Kill Devil Hills on a marsh island within Kitty Hawk Woods Coastal Reserve; USGS Kitty Hawk topographic quadrangle.
Latitude--36.026597
Longitude-- -75.698933
Datum--WGS84
Coordinates source--from hand-held GPS
RANGE IN CHARACTERISTICS:
Depth to mineral materials--ranges from 40 to 130 centimeters (16 to 51 inches).
Depth to Bedrock--Greater than 200 cm (80 inches).
Soil moisture--These soils have peraquic moisture and are tidally flooded daily
Soil Reaction--Moderately acid to slightly alkaline, throughout the profile.
Moist incubated soil reactions--Extremely acid to slightly acid.
Electrical Conductivity (1:5 soil-water)--greater than 0.6 dS/m
Wood Fragments--0 to 10 percent, by volume in woody peat deposits.
Shell Fragments--0 to 10 percent, by volume in underlying marine deposits.
Mica Flakes--Few to many very fine to fine in subsoil mineral horizons.
Other features--Some pedons have thin (<5 centimeters) stratified layers of mineral material within organic horizons.
Range of Individual Horizons:
Oese horizon (where present)
Hue--10YR to 2.5Y or neutral
Value--2 to 4
Chroma--0 to 4
Unrubbed fiber--25 to 75 percent
Rubbed fiber content-- 17 to 40 percent
Von Post--H4 to H6
Some pedons have thin lenses (<5 centimeters) of mineral materials.
Oase horizon
Hue-2.5YR to 2.5Y or neutral
Value--2 to 4
Chroma--0 to 3
Unrubbed fiber--10 to 40 percent
Rubbed fiber content--less than 17 percent
Von Post--H7 to H10
Some pedons have lenses of hemic organic materials.
Aseg or Ase horizon (where present)
Hue--10YR to 5Y or is neutral
Value--2 to 4
Chroma--0 to 3
Texture--sandy loam, loamy sand, or sand with mucky analogs
Manner of failure--slightly or nonfluid
Cseg horizon
Hue--10YR to 5GY or is neutral
Value--4 to 6
Chroma--0 to 2
Texture--loamy sand or sand
Manner of failure--nonfluid
Iron concentrations and / or depletions can occur
COMPETING SERIES:
Shima soils--are dominantly muck materials, do not have sulfurous odors, are often irrigated for commodity crop production and formed in freshwater marsh deposits away from the Pacific coast
GEOGRAPHIC SETTING:
MLRA(s)--153A and 153B
Parent Material--Herbaceous and woody organic materials underlain by sandy marine deposits
Landscape--Coastal Plain
Landform--Freshwater and oligohaline estuary tidal marshes (Atlantic Coast)
Slope--1 percent or less
Elevation--0.3 meters below sea level to 1 meter (-1 to 3 feet)
Mean Annual Air Temperature--14 to 21 degrees C. (58 to 70 degrees F.)
Mean Annual Precipitation--1,143 to 1,524 millimeters (45 to 60 inches)
Water salinity range--2 to 5 parts per thousand (ppt)
Frost Free Period--360 to 365 days
GEOGRAPHICALLY ASSOCIATED SOILS:
Backbay soils-are mineral soils in similar landscape positions but lack the thicker organic materials.
Carteret soils--are mineral soils flooded daily by salt water.
Corolla,
Duckston, and
Newhan soils--are mineral soils and occur nearby but higher on the landscape.
Delway soils--are flooded daily by saltwater and have loamy fluviomarine substratum materials
Hobonny and
Longshoal soils--have thick organic materials greater than 130 centimeters (51 inches).
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage Class--Very poorly drained
Saturated Hydraulic Conductivity--Moderately high to high
Internal Free Water Occurrence--Continuously very shallow, 0 to 25 centimeters (0 to 10 inches)
Flooding--Very frequently flooding for extremely or very brief durations (daily high tides and variable wind tides)
Soil moisture regime--Peraquic
USE AND VEGETATION:
Major uses--Natural habitat for waterfowl, certain fur bearing animals, fish, and shellfish.
Native vegetation--Black needlerush, with lesser amounts of big cordgrass, eastern baccharis, and cattail.
DISTRIBUTION AND EXTENT:
General area--Coastal estuarine areas of North Carolina and possibly Virginia and South Carolina.
Extent--Moderate
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Currituck County, North Carolina; 1980.
REMARKS:
This series is mapped in areas previously mapped as fresh water tidal marsh. Values for fiber content, pH, moist incubation pH, and electrical conductivity are based on laboratory data from N.C. State University, Department of Crop and Soil Sciences.
Diagnostic horizons and features recognized in this pedon include--
Histosols (Terric)--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 does not exceed 130 centimeters in depth - the zone from a depth of 0 to 118 cm (Oese, Oase1, Oase2, Oase3, Oase4).
Hemic soil materials--the zone from the soil surface to 8 centimeters (0 to 3 inches). (Oese horizon)
Sapric soil materials--the zone from 8 to 118 centimeters centimeters (3 to 43 inches). (Oase1 and Oase2 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 N.C. State University.
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation
NC0116 CURRITUCK 0- 1 58- 70 190-240 42- 52 0- 3
SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness
NC0116 FREQ 0-1.0 APPARENT JAN-DEC 60-60
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC-
NC0116 0-14 MUCK MPT 0- 0 - 0- 0 20- 95
NC0116 14-28 MUCK 0- 0 - 0- 0 20- 95
NC0116 28-60 LS S 0- 0 90-100 3-10 1- 10
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll
NC0116 0-14 4.5- 5.5 20-95 0- 2 0.6- 6.0 LOW
NC0116 14-28 2.0- 5.5 20-95 2- 4 0.6- 6.0 LOW
NC0116 28-60 2.0- 5.5 .5-8. 2- 4 6.0- 20 LOW
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National Cooperative Soil Survey
U.S.A.