LOCATION INDIANTOWN              MD

Established Series
JLB-GPD/REV. JAK
11/2015

INDIANTOWN SERIES

The Indiantown series consists of very deep, very poorly drained soils located on nearly level flood plains of the mid-Atlantic Coastal Plain. They formed in loamy fluvial sediments overlying sandy alluvial and marine sediments. Permeability is moderate. Slopes range from 0 to 1 percent. Mean annual temperature is 57 degrees F., and mean annual precipitation is 44 inches.

TAXONOMIC CLASS: Coarse-loamy, siliceous, active, acid, mesic Cumulic Humaquepts

TYPICAL PEDON: Indiantown mucky silt loam, on a smooth 0 percent slope, in a wooded floodplain. (Colors are for moist soil.)

A1--0 to 13 inches; very dark brown (10YR 2/2) mucky silt loam; weak, fine, granular structure; friable, slightly sticky, slightly plastic; many very fine and fine roots; very strongly acid; abrupt wavy boundary. (0 to 15 inches thick)

A2--13 to 25 inches; black (10YR 2/1) mucky loam; massive; friable, slightly sticky, slightly plastic; common very fine and fine roots; very strongly acid; abrupt wavy boundary.

Cg1--25 to 41 inches; grayish brown (10YR 5/2) loamy sand; common coarse black (10YR 2/1) organic stains; massive; few very fine roots; extremely acid; abrupt wavy boundary.

Cg2--41 to 51 inches; dark grayish brown (2.5Y 4/2) loamy sand; common medium very dark gray (10YR 3/1) organic stains; massive; very strongly acid; clear wavy boundary.

Cg3--51 to 72 inches; dark grayish brown (2.5Y 4/2) sand; few medium prominent dark yellowish brown (10YR 3/6) areas of iron accumulations; few medium very dark gray (10YR 3/1) organic stains; single grain; loose; extremely acid.

TYPE LOCATION: Worcester County, Maryland; 1 mile North of Millville Road on Route 12, 300 feet NW of Route 12, along Millville Creek. 38 degrees, 16 minutes, 00 seconds N Latitude. 75 degrees, 30 minutes, 30 seconds W Longitude.

RANGE IN CHARACTERISTICS: Organic matter content in the A horizon ranges from 5 to 18 percent. In the substratum organic matter is variable and ranges from 1 to 10 percent. Reaction ranges from extremely acid to strongly acid throughout the soil profile. Salinities are less than 2 Mmhos.

The A horizon has a hue of 7.5YR through 2.5Y or neutral, value of 2 or 3, and chroma of 0 through 2. It is mucky silt loam, mucky loam, silt loam or loam.

The Cg horizon has a hue of 10YR through 5Y, value of 3 through 7, and chroma of 1 through 3. It is loam, sandy loam, loamy sand or sand.

A 2Cg horizon, where present, has similar properties to the Cg horizon and can be identified in areas where the deposited material has originated from areas where a silt mantle dominates the surrounding uplands.

COMPETING SERIES: There are no known series in the same family. Competing series in a closely related families are the Ballahack, Johnston and Polawana soils. Ballahack and Polawana soils have mixed mineralogy and are thermic. Johnston soils have a thermic temperature regime.

GEOGRAPHIC SETTING: The Indiantown soils are nearly level soils located on narrow low gradient flood plains of the mid-Atlantic Coastal Plain. The slopes range from 0 to 1 percent. These soils formed in loamy fluvial sediments overlying sandy alluvial and marine sediments. Mean annual temperature ranges from 52 to 58 degrees F., and mean annual precipitation ranges from 38 to 48 inches.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Fallsington, Hurlock, Askecksy, Kentuck, Mullica, Manahawkin, Chicone, and Zekiah soils. Fallsington, Hurlock, Askecksy, Kentuck, and Mullica soils are at slightly higher elevations above the floodplain on adjacent low-lying uplands. Manahawkin and Chicone soils occur at slightly lower elevation within the floodplain. Zekiah soils are found on narrow flood plains in the upper reaches of streams and may also be found intermingled with Indiantown soils.

DRAINAGE AND PERMEABILITY: Very poorly drained. Runoff is very slow. Permeability is moderate in the surface and moderately rapid to rapid in the substratum. A seasonal high water table ranging from 6 inches above to 6 inches below the soil surface is present from September to June. These soils are flooded for brief periods during storm events.

USE AND VEGETATION: Indiantown soils are used mainly as wetland wildlife habitat. Most areas are along active streams. Native vegetation includes Red Maple (Acer rubrum), Blackgum (Nyssa sylvatica), Water Oak (Quercus nigra), and Baldcypress (Taxodium distichum). The understory includes Sweetbay (Magnolia virginiana), American Holly (Ilex opaca), Highbush Blueberry (Vaccinium corybosum) and sedges (Carex spp.).

DISTRIBUTION AND EXTENT: Flood plains of the mid-Atlantic Coastal Plain of Maryland, Delaware, and New Jersey. This series is of small extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: RALEIGH, NORTH CAROLINA

SERIES ESTABLISHED: Worcester County, Maryland, 1995.

REMARKS: This soil was formerly included in the Johnston soil series and in the Mixed Alluvial miscellaneous area.

Diagnostic horizons and other diagnostic soil characteristics recognized in this pedon are:
Umbric epipedon--the zone from 0 to 25 inches (A1 and A2 horizons)

---

National Cooperative Soil Survey
U.S.A.