LOCATION PAMLICO NC+AL FL MS SC VAEstablished Series
TAXONOMIC CLASS: Sandy or sandy-skeletal, siliceous, dysic, thermic Terric Haplosaprists
TYPICAL PEDON: Pamlico muck, undrained--forested. (Colors are for moist soil unless otherwise stated.)
Oi--0 to 3 inches; very dark brown (10YR 2/2) fibric material; 75 percent fiber content after rubbing; friable; fibers are of moss, leaves, twigs, and roots; extremely acid; gradual wavy boundary. (0 to 4 inches thick)
Oa1--3 to 14 inches; black (10YR 2/1) sapric material; 10 percent fiber; weak coarse granular structure; friable; slightly sticky; common roots; sodium pyrophosphate extract is yellowish brown (10YR 5/4); extremely acid; gradual wavy boundary.
Oa2--14 to 30 inches; very dark grayish brown (10YR 3/2) sapric material; 20 percent fiber; less than 10 percent rubbed; massive; friable; slightly sticky; few roots; sodium pyrophosphate extract is light yellowish brown (10YR 6/4); extremely acid; gradual wavy boundary. (combined thickness of Oa horizon is 16 to 51 inches)
Cg--30 to 60 inches; very dark grayish brown (10YR 3/2) loamy sand; single grained; loose; extremely acid.
TYPE LOCATION: Wayne County, North Carolina; 8 miles east of Mt. Olive on North Carolina Highway 55; 0.6 mile south of intersection with county road 1948; 100 feet northeast of bridge crossing northeast Cape Fear River.
RANGE IN CHARACTERISTICS: Pamlico soils have 16 to 51 inches of organic material over dominantly sandy sediments. Reaction is extremely acid (less than 4.5 in 0.01 M calcium chloride) in the organic layers, and ranges from extremely acid to strongly acid in the underlying mineral layers.
The Oi or Oe horizon has hue of 10YR, 7.5YR, or it is neutral, value of 2 or 3, chroma of 0 to 2.
The Oa horizon has hue of 10YR, 7.5YR, or it is neutral, value of 2 or 3, chroma of 0 to 2. Fiber content is 10 to 33 percent unrubbed and less than 10 percent after rubbing. Structure is coarse granular or massive.
The Cg horizon has hue of 7.5YR or 10YR or it is neutral, value of 2 to 6, chroma of 0 to 2. The weighted average of the upper 12 inches of the Cg horizon, or of the part of the Cg horizon that is within a depth of 51 inches, whichever is thicker, is sandy. Textures are typically sand, fine sand, loamy sand, or loamy fine sand, but may also be mucky analogs of the same fine earth textures in some pedons. In some pedons, thin subhorizons of the Cg within a depth of 51 inches are loamy. Textures are typically sandy loam, fine sandy loam, or sandy clay loam. Below a depth of 51 inches, texture is variable, typically ranging from sand to sandy clay loam.
COMPETING SERIES: There is no other known series in this family. Belhaven, Croatan, Currituck, Dare, Dorovan, Ponzer, and Scuppernong series are in closely related families. Belhaven, Ponzer, and Scuppernong soils have mixed mineralogy and are underlain by dominantly loamy mineral soil material. Croatan soils are underlain by dominantly loamy mineral material. Currituck soils are less acid and have mixed mineralogy. Dare and Dorovan soils have organic layers more than 51 inches thick.
GEOGRAPHIC SETTING: Pamlico soils occur in the flood plains of tributaries of major streams and on level to depressional surfaces of the coastal plain. These soils are formed in decomposed organic matter overlying dominantly sandy mineral sediments. The mean annual temperature is 63 degrees F. and the annual precipitation is 48 inches near the type location.
GEOGRAPHICALLY ASSOCIATED SOILS: These include the Dare and Dorovan of the competing series, and Bibb, Johnston, Portsmouth, Rutlege, and Torhunta series. Bibb, Johnston, Portsmouth, Rutlege, and Torhunta soils are mineral soils with loamy surface layers high in organic matter.
DRAINAGE AND PERMEABILITY: Very poorly drained; ponded or very slow runoff; flooding is rare to frequent; permeability is moderate to moderately rapid in the organic layers and slow to very rapid in the mineral layers.
USE AND VEGETATION: In the natural stage, practically all of these soils are used for woodland and wildlife. The native vegetation consists of pond pine, tupelo gum, sweetbay, gumtrees, cypress, greenbrier, wax myrtle bushes, with undergrowth of gallberry and cut bamboo briers. These soils are used for improved pasture, corn, soybeans, oats, truck crops, and other cultivated crops when drained.
DISTRIBUTION AND EXTENT: Lower Coastal Plain areas of Alabama, Florida, Mississippi, North Carolina, South Carolina, and Virginia. The series is moderately extensive.
MLRA OFFICE RESPONSIBLE: Raleigh, North Carolina
SERIES ESTABLISHED: Pamlico County, North Carolina; 1935.
REMARKS: Pamlico muck, as mapped in the past, included a very wide range of conditions. The concept expressed in this description is restricted in thickness, degree of decomposition and nature of underlying materials.
Diagnostic horizons and features recognized in the typical pedon are:
Organic materials (terric) - the zone from the surface to a depth of 30 inches (the Oi, Oa1, and Oa2 horizons)
Sandy particle-size class - mineral material within a depth of 51 inches that has weighted average of the sandy particle-size class in the upper 12 inches of the mineral material or within the control section (51 inches), whichever is thicker (the Cg horizon)
MLRA(S): 152A, 153A, 153B, 133A
SIR(S): NC0050, NC0154 (LOAMY SUBSTRATUM), NC0155 (PONDED),
NC0159 (FLOODED), NC0270 (PONDED, LOAMY SUBSTRATUM)
REVISED=6/10/96, MHC
TABULAR SERIES DATA:
SOI-5 Soil Name Slope Airtemp FrFr/Seas Precip Elevation NC0050 PAMLICO 0- 1 62- 70 240-310 45- 60 30- 150 NC0154 PAMLICO 0- 1 62- 70 240-310 45- 60 30- 150 NC0155 PAMLICO 0- 1 62- 70 240-310 45- 60 25- 150 NC0159 PAMLICO 0- 1 62- 70 240-310 45- 60 30- 150 NC0270 PAMLICO 0- 1 62- 70 240-310 45- 60 30- 150SOI-5 FloodL FloodH Watertable Kind Months Bedrock Hardness NC0050 RARE 0-1.0 APPARENT DEC-MAY 60-60 NC0154 RARE 0-1.0 APPARENT JAN-DEC 60-60 NC0155 RARE - APPARENT - 60-60 NC0159 FREQ - APPARENT - 60-60 NC0270 RARE - APPARENT - 60-60
SOI-5 Depth Texture 3-Inch No-10 Clay% -CEC- NC0050 0-30 MUCK 0- 0 - 0- 0 100-230 NC0050 30-60 LS S LFS 0- 0 100-100 5-10 1- 5 NC0154 0-24 MUCK 0- 0 - - 100-230 NC0154 24-48 FS LFS 0- 0 100-100 5-10 1- 5 NC0154 48-72 FSL SCL 0- 0 100-100 15-35 5- 15 NC0155 0-30 MUCK 0- 0 - 0- 0 100-230 NC0155 30-60 S FS LS 0- 0 100-100 5-10 1- 5 NC0159 0-30 MUCK 0- 0 - 0- 0 100-230 NC0159 30-60 LS S LFS 0- 0 100-100 5-10 1- 5 NC0270 0-24 MUCK 0- 0 - - 20-230 NC0270 24-48 FS LFS 0- 0 100-100 5-10 1- 5 NC0270 48-72 FSL SCL 0- 0 100-100 15-35 5- 15
SOI-5 Depth -pH- O.M. Salin Permeab Shnk-Swll NC0050 0-30 3.5- 4.4 20-80 0- 0 0.6- 6.0 LOW NC0050 30-60 3.5- 5.5 .5-5. 0- 0 6.0- 20 LOW NC0154 0-24 3.5- 4.4 20-80 0- 0 0.6- 6.0 LOW NC0154 24-48 3.5- 5.5 .5-5. 0- 0 6.0- 20 LOW NC0154 48-72 3.5- 5.5 .5-1. 0- 0 0.06- 0.2 LOW NC0155 0-30 3.5- 5.5 20-80 0- 0 0.6- 6.0 LOW NC0155 30-60 3.5- 5.5 .5-5. 0- 0 6.0- 20 LOW NC0159 0-30 3.5- 5.5 20-80 0- 0 0.6- 6.0 LOW NC0159 30-60 3.5- 5.5 .5-5. 0- 0 6.0- 20 LOW NC0270 0-24 3.5- 4.4 20-80 0- 0 0.6- 6.0 LOW NC0270 24-48 3.5- 5.5 .5-5. 0- 0 6.0- 20 LOW NC0270 48-72 3.5- 5.5 .5-1. 0- 0 0.06- 0.2 LOW