Ninigret Pond Soil Pedon Description: S04-RI-009-003 (Site X Mainland Cove)

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Pedon Description
Map Unit Description
XRF Heavy Metal Analysis
Core Analyzer Data
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 Site Information

Print Date:   11/08/2004
Description Date:   09/01/2004
Describer:   Mike Bradley, Jim Turenne
 
Site ID:   Site X
Site Notes:   Hammer Core Sample 4 in Polycarbonate tube, sampled to 164 cm. Core was analyzed/imaged by GSO using a Geo Tek Core Analyser, data available.
Pedon ID:   S04-RI-009-003
Pedon Notes:   Soil consists of 96 cm of lagoon-bottom deposits overlying buried organic material interpreted as an Atlantic White Cedar swamp kettle hole. Nearby area found the organics to be > 20 feet thick.
Lab Source ID:    
Lab Pedon #:   Site X
 
Soil Name as Described/Sampled: Mainland Cove    
Soil Name as Correlated:    
Classification: Thapto-Histic Sulfaquent (need clay content, if >8% clay = Haplic  

 

 
Pedon Type:    
Pedon Purpose:   Ninigret Pond subaqueous soil survey pilot project.
Taxon Kind:    
Associated Soils:   Lagoon Bottom
 
Location Information
Country:   USA
State:   RI
County:   Washington
MLRA:   149B
Soil Survey Area:   RI600-009
Quad Name:   Qunochontaug
 
Location Description:   Ninigret Pond, Charleston, RI. Ft. Neck Cove west-central area near shore.
Legal Description:    
 
Latitude:   41 degrees 22 minutes 15.53 seconds north
Longitude:   71 degrees 39 minutes 8.12 seconds west
Datum:   NAD83
UTM Zone:   19
UTM Easting:   278186 meters
UTM Northing:   4583335 meters
 
Physiographic Division:   Atlantic Lowland
Physiographic Province:   Coastal Plain
Physiographic Section:   Embayed Section
State Physiographic Area:    
Local Physiographic Area:   Ninigret Pond
 
Geomorphic Setting:   Coastal Pond
Upslope Shape:    
Cross Slope Shape:    
 
Primary Earth Cover:   Salt Water
Secondary Earth Cover:    
Plant Association Name:    
Existing Vegetation:    
 
Parent Material:   Lagoon Bottom silty estuarine deposits over Organic woody organic material
Bedrock Kind:    
Bedrock Depth:    
Bedrock Hardness:    
Bedrock Fracture Interval:    
 
Surface Fragments:   None
 
Particle Size Control Section:    
 
Diagnostic Features:    

 

 Climate Data:

Slope (%)

Elevation (feet)

Aspect (deg)

MAAT (F)

MSAT (F)

MWAT (F)

MAP (in)

Frost Free Days

Drainage Class

Slope Length (feet)

Upslope Length (feet)

 

 

 

 

 

 

 

 

very poorly

 

 

 Pedon Description:

A1--0 to 5 centimeters (0.0 to 2.0 inches); black (5Y 2.5/1) interior, silt loam; massive; loose, nonsticky, nonplastic; very fluid; extremely low penetration resistance; low excavation difficulty; negative reaction to alpha-alpha' dipyridyl; gradual boundary. Moderate hydrogen sulfide odor, n value = >>1.

C1--5 to 55 centimeters (2.0 to 21.7 inches); black (5Y 2.5/1) interior, silt loam; massive; loose, nonsticky, nonplastic; moderately fluid; extremely low penetration resistance; low excavation difficulty; negative reaction to alpha-alpha' dipyridyl; gradual. Slight hydrogen sulfide odor, n value = 1.

C2--55 to 88 centimeters (21.7 to 34.6 inches); black (5Y 2.5/1) interior, silt loam; massive; loose, nonsticky, nonplastic; moderately fluid; extremely low penetration resistance; low excavation difficulty; negative reaction to alpha-alpha' dipyridyl; gradual boundary. Slight hydrogen sulfide odor, n value = 1.

C/O--88 to 96 centimeters (34.6 to 37.8 inches); 65 percent black (5Y 2.5/1) interior and 35 percent black (7.5YR 2.5/1) rubbed, silt loam and muck; massive; very friable, nonsticky, nonplastic; moderately fluid; extremely low penetration resistance; low excavation difficulty; 1 percent nonflat subrounded noncemented wood fragments; negative reaction to alpha-alpha' dipyridyl; abrupt boundary.

2Oa--96 to 164 centimeters (37.8 to 64.6 inches); dark brown (7.5YR 3/3) interior and black (5YR 2.5/1) oxidized and dark brown (7.5YR 3/2) rubbed, muck; loose, nonsticky, nonplastic; very fluid; extremely low penetration resistance; low excavation difficulty; negative reaction to alpha-alpha' dipyridyl. NOTE: organic material was greater than 20 feet thick in area.

Map Unit Description:

Mc(A) Mainland Cove, 1 2% slopes:  These soils are found in protected coves along the mainland shoreline.  The subaqueous soils of this unit are characterized by black, very dark gray, and dark gray, loamy sand, fine sandy loams and silt loam.   Two types of buried organic horizons (30% organic carbon) are found at depths of 50 cm 80 cm.  Reddish black organic horizons are probably remnants of buried Pleistocene-aged Atlantic white cedar swamps.  The dramatic decrease in salinity of these layers supports this origin.  Yellowish black buried organic horizons are probably indicative of salt marsh peat.  Most soils are classifed as Thapto-histic Hydraquents.  Water depths are 1.4 m or less.  Submerged topography is gently sloping  (1%).  Eelgrass cover is moderate (10-50%).

Core XRF Data (analyzed with a Niton XRF Unit - <LOD = limit of detection):

Units

Depth from Surface(in)

Sample

Mo

Zr

Sr

Rb

Pb

Se

As

Hg

Zn

Cu

Ni

Co

Fe

Mn

Cr

ppm

-5

X 5IN

< LOD : 2.07

41.49

49.52

40.39

28.69

< LOD : 8.33

< LOD : 14.02

< LOD : 10.37

< LOD : 39.63

< LOD : 53.85

< LOD : 61.94

< LOD : 100.06

5680.33

< LOD : 101.50

< LOD : 99.30

ppm

-8

X 8IN

< LOD : 1.92

22.35

31.04

22.36

15.47

< LOD : 7.52

< LOD : 12.04

< LOD : 9.11

< LOD : 34.04

< LOD : 48.64

< LOD : 58.76

< LOD : 90.54

4911.97

< LOD : 87.42

< LOD : 85.82

ppm

-18

X 18IN

< LOD : 1.96

17.33

36.79

32.16

< LOD : 12.43

< LOD : 8.07

< LOD : 12.51

< LOD : 10.03

< LOD : 38.40

< LOD : 51.98

< LOD : 64.88

< LOD : 119.86

8183.2

131.63

< LOD : 96.05

ppm

-24

X 24IN

< LOD : 2.36

59.93

42.89

43.4

< LOD : 13.71

< LOD : 9.42

< LOD : 13.44

< LOD : 11.19

< LOD : 42.15

< LOD : 60.51

< LOD : 71.06

< LOD : 147.43

12048.11

< LOD : 120.99

< LOD : 116.09

ppm

-34

X 34IN

< LOD : 2.59

187.24

39.23

33.47

< LOD : 14.13

< LOD : 9.13

< LOD : 14.09

< LOD : 10.90

< LOD : 43.09

< LOD : 59.35

< LOD : 71.02

< LOD : 140.58

10370.62

139.54

< LOD : 114.86

ppm

-42

X 42IN PEAT

< LOD : 1.26

< LOD : 3.99

16.55

2.42

< LOD : 7.94

< LOD : 5.43

< LOD : 8.15

< LOD : 6.61

< LOD : 23.08

< LOD : 32.58

< LOD : 39.67

< LOD : 32.32

261.64

< LOD : 54.52

< LOD : 52.36

ppm

-52

X 52IN PEAT

< LOD : 1.27

< LOD : 3.60

9.94

< LOD : 2.06

< LOD : 7.70

< LOD : 5.32

< LOD : 7.77

< LOD : 6.55

< LOD : 22.69

< LOD : 31.94

< LOD : 40.00

< LOD : 31.23

255.94

< LOD : 50.46

< LOD : 51.94

ppm

-62

X 62IN PEAT

< LOD : 1.26

< LOD : 4.30

11.91

< LOD : 2.00

< LOD : 7.92

< LOD : 5.20

< LOD : 8.10

< LOD : 6.52

< LOD : 22.00

< LOD : 31.72

< LOD : 40.41

< LOD : 35.89

640.9

< LOD : 54.52

< LOD : 51.75

ppm

-18

2 18IN

< LOD : 4.41

752.19

115.29

59.44

27.36

< LOD : 12.63

< LOD : 19.49

< LOD : 14.86

< LOD : 59.78

< LOD : 86.25

< LOD : 97.25

< LOD : 112.37

3298.07

< LOD : 149.91

< LOD : 151.98

ppm

-36

2 36IN

< LOD : 4.03

273.81

105.5

94.21

< LOD : 22.24

< LOD : 14.10

< LOD : 22.58

< LOD : 17.23

< LOD : 70.81

< LOD : 100.70

< LOD : 113.65

< LOD : 115.56

2486.05

< LOD : 163.64

< LOD : 169.83

ppm

-50

2 50IN

< LOD : 3.12

51.91

128.56

112.36

26.46

< LOD : 13.10

< LOD : 20.23

< LOD : 16.05

< LOD : 65.54

< LOD : 94.79

< LOD : 104.96

< LOD : 104.29

2228.42

< LOD : 157.12

< LOD : 156.74

 

Core Analyzer Data (information about this to be provided later):

Soil Profile Image (Hi-resolution image available - 51 MB Tiff image):