LOCATION DUTCHMAN POINT MD
Established Series
BMW/RBT
04/2021
DUTCHMAN POINT SERIES
MLRA(s): 149A
Soil Survey Regional Office (SSRO) Responsible: Raleigh, North Carolina
Depth Class: Very deep
Drainage Class: Subaqueous (permanently submersed / continuously inundated)
Saturated Hydraulic Conductivity: Moderately high to high and low to very low in the lithologic discontinuity
Parent Material: Sandy estuarine deposits over fine-silty glauconitic fluviomarine deposits
Slope: 0 to 2 percent
Mean Annual Air Temperature: 57 degrees F. (14 degrees C)
Mean Annual Water Temperature: 57 degrees F. (14 degrees C)
TAXONOMIC CLASS: Glauconitic, mesic Fluventic Psammowassents
TYPICAL PEDON: Dutchman Point sand on a west facing submerged wave-built terrace with less than 1 percent slope under 0.9 m of estuarine water. (Colors are for moist soil unless otherwise stated).
Ase -- 0 to 7 cm; dark gray (5Y 4/1) sand; single grain; nonfluid; slightly alkaline (pH 7.7), slightly acid (pH 6.4) after 16 weeks; no color reaction with 3% hydrogen peroxide, very slightly effervescent with 30% hydrogen peroxide; clear boundary.
Cse1 -- 7 to 31 cm; very dark gray (5Y 3/1) sand; single grain; nonfluid; moderately alkaline (pH 8.2), slightly acid (pH 6.2) after 16 weeks; no color reaction with 3% hydrogen peroxide, very slightly effervescent with 30% hydrogen peroxide; krotovina present; clear boundary.
Cse2 -- 31 to 45 cm; greenish black (10Y 2.5/1) coarse sand; single grain; nonfluid; strongly alkaline (pH 8.5), neutral (pH 6.7) after 16 weeks; color reaction with 3% hydrogen peroxide, very slightly effervescent with 30% hydrogen peroxide; krotovina present; clear boundary.
Cse3 -- 45 to 52 cm; very dark gray (5Y 3/1) coarse sand; 20% mixed gravels; single grain; nonfluid; strongly alkaline (pH 8.6), neutral (pH 6.9) after 16 weeks; no color reaction with 3% hydrogen peroxide, very slightly effervescent with 30% hydrogen peroxide; krotovina present; clear boundary.
Cse4 -- 52 to 76 cm; very dark gray (5Y 3/1) sand; single grain; nonfluid; moderately alkaline (pH 8.4), neutral (pH 6.7) after 16 weeks; no color reaction with 3% hydrogen peroxide, very slightly effervescent with 30% hydrogen peroxide; krotovina present; gradual boundary.
Aseb1 -- 76 to 86 cm; black (N 2.5/) sand; single grain; nonfluid; moderately alkaline (pH 8.4), neutral (pH 7.3) after 16 weeks; color reaction with 3% hydrogen peroxide, very slightly effervescent with 30% hydrogen peroxide; trace shell fragments; abrupt boundary.
C'se1 -- 86 to 102 cm; very dark gray (5Y 3/1) coarse sand; single grain; nonfluid; moderately alkaline (pH 8.2), slightly alkaline (pH 7.6) after 16 weeks; no color reaction with 3% hydrogen peroxide, very slightly effervescent with 30% hydrogen peroxide; abrupt boundary.
C'se2 -- 102 to 107 cm; very dark gray (5Y 3/1) very gravelly coarse sand; 50% mixed gravels; single grain; nonfluid; strongly alkaline (pH 8.9), neutral (pH 7.3) after 16 weeks; color reaction with 3% hydrogen peroxide, very slightly effervescent with 30% hydrogen peroxide; clear boundary.
2Aseb2 -- 107 to 132 cm; black (N 2.5/) silt loam; black root channels present that stain hands black; trace preserved roots present; massive; moderately fluid; strongly alkaline (pH 8.8), very strongly acid (pH 4.9) after 16 weeks; color reaction with 3% hydrogen peroxide, slightly effervescent with 30% hydrogen peroxide; gradual boundary.
2Cse -- 132 to 200 cm; very dark greenish gray (5GY 3/1) silty clay; trace preserved roots, root channels, and shell fragments present; massive; slightly fluid; moderately alkaline (pH 8.3), very strongly acid (pH 4.5) after 16 weeks; no color reaction with 3% hydrogen peroxide, slightly effervescent with 30% hydrogen peroxide.
TYPE LOCATION: Anne Arundel County, Maryland; approximately 882 feet northwest of Dutchman Point and approximately 2,200 feet southeast of Sand Point in the Rhode River. USGS Deale topographic quadrangle; latitude 38 degrees, 52 minutes, 13.43 seconds N; 76 degrees, 30 minutes, 44.92 seconds W; WGS 1984.
RANGE IN CHARACTERISTICS:
Depth to Bedrock: Greater than 200 centimeters
Depth to Seasonal High Water Table: Permanently submersed
Depth to Lithologic Discontinuity: Greater than 80 centimeters.
Depth to hyper-sulfidic materials: greater than 100 centimeters if present
Depth to hypo-sulfidic materials: 0 to 100 centimeters and generally throughout
Manner of Failure / Fluidity Class: Nonfluid in the upper 100 centimeters and slightly to moderately fluid below 100 centimeters.
Shell Fragments: 0 to 10 percent, by volume, throughout
Soil reaction: Neutral to strongly alkaline; oxidized reaction: neutral to very strongly acid
Salinity: Between 7 to 15 ppt throughout the profile.
Buried A horizons may be present in these soils.
RANGE OF INDIVIDUAL HORIZONS:
Ase or Aseg horizon:
Color- hue of 5Y, 10Y, and 5GY, value of 2.5 to 4, and chroma of 1
Texture (fine-earth fraction) - sand
Cse or Cseg horizons:
Color- hue of 5Y, 10Y, 5GY, and Neutral, value of 2.5, 3, and 5, and chroma of 0 and 1
Texture (fine-earth fraction) - coarse sand, sand, loamy sand, and loamy fine sand
Aseb horizon (if present):
Color- hue of Neutral, value of 2.5, and chroma of 0
Texture (fine-earth fraction)-sand
C'se horizon (if present):
Color- hue of 5Y, value of 3, and chroma of 1
Texture (fine-earth fraction): sand and coarse sand
2Aseb horizon (if present):
Color- hue of Neutral and 2.5Y, value of 2.5 and 3, chroma of 1
Texture (fine-earth fraction)-silt loam and sandy loam
2Cse or 2Cseg horizon:
Color- hue of Neutral, 10Y, and 5GY, value of 2.5 and 3, chroma of 1
Texture-sandy loam, sandy clay loam, silty clay, and clay loam
COMPETING SERIES: None.
GEOGRAPHIC SETTING:
Landscape: Northern Coastal Plain estuaries
Landform: Submerged wave-built terraces, wave-cut platforms, shoals, and estuarine tidal creek platforms
Parent Material: Sandy estuarine deposits over fine-silty glauconitic fluviomarine deposits
Slope: 0 to 2 percent
Mean Annual Air Temperature: 57 degrees F. (14 degrees C)
Mean Annual Water Temperature: 57 degrees F. (14 degrees C)
Bathymetry: 0 to 2.5 meters below men sea level
Water Regime: Tidal, 0 to 1 foot (0 to 0.3 meters) tidal range
Water Salinity Range: 7 to 15 ppt
GEOGRAPHICALLY ASSOCIATED SOILS:
Rhode River soils- These soils have a coarse-loamy particle size class and have a lithologic discontinuity contact with buried pre-Holocene upland soil materials.
Sand
Point soils- These soils are not sandy throughout the upper 100 centimeters and contain sulfidic materials within 10 centimeters of the soil surface.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage Class: Subaqueous and peraquic soil moisture regime
Saturated Hydraulic Conductivity: Moderately high to high and low to very low in the lithologic discontinuity
Soil is permanently submerged / continuously inundated with brackish water. These soils have potential to have sulfidic materials within the soil profile putting these soils at risk for potential acid sulfate soil formation if they are dredged and exposed to the air.
USE AND VEGETATION:
Major Uses: Areas of this soil are used for recreational fishing, swimming, boating, and dock and marina construction. Commercial uses include shell fishing and aquaculture. Benthic fauna such as clams, blue crabs, and oysters are associated with this soil. Eelgrass (Zostera marina), sea lettuce (Ulva sp.), and horned pondweed (Zannichellia palustris) may occur on these soils.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Raleigh, North Carolina.
DISTRIBUTION AND EXTENT: Northern Atlantic Coastal Plain sub-estuaries of the western portion of the Chesapeake Bay. MLRA 149A. This series is of small extent.
SERIES ESTABLISHED: Anne Arundel County, Maryland, 2018.
REMARKS: This subaqueous series is named for Dutchman Point, located at the mouth of the Rhode River subestuary of Chesapeake Bay.
Diagnostic horizons and features recognized in this pedon include:
Ochric epipedon- 0 to 7 centimeters
Peraquic conditions- 0 to 200 centimeters (permanently saturated)
Lithologic Discontinuity- 107 to 200 centimeters
ADDITIONAL DATA:
NASIS user site and Pedon ID: S2015MD003028
National Cooperative Soil Survey
U.S.A.