Ninigret Pond Soil Pedon Description: VBI (Mainland Submerged Beach (sand phase))

Quick Links:
 Site Information
Pedon Description
Map Unit Description
Lab Data
Chemistry Data
Soil Profile Image

Site Information

Print Date:  

06/14/2004

Description Date:  

09/18/2000

Describer:  

 Mike Bradley

 

Site ID:  

VBI

Site Notes:  

Vibra Core Description

Pedon ID:  

VBI

Pedon Notes:  

 

Lab Source ID:  

 URI

Lab Pedon #:  

 

 

Soil Name as Described/Sampled:  

Mainland Submerged Beach (sand phase)

Soil Name as Correlated:  

 

Classification:  

 

 

 

Pedon Type:  

 

Pedon Purpose:  

Research – Masters Thesis

Taxon Kind:  

 

Associated Soils:  

 

 

Location Information

Country:  

USA

State:  

RI

County:  

Washington

MLRA:  

149B

Soil Survey Area:  

 

Quad Name:  

Quonochataug

 

Location Description:  

Ninigret Pond, Charlestown, RI Shallow water area north of island with duck blind west of private dock

Legal Description:  

 

 

Latitude:  

41 22  7.93256 N

Longitude:  

071 38 35.85220 W

Datum:  

NAD83

UTM Zone:  

19

UTM Easting:  

278929 meters

UTM Northing:  

4583078 meters

 

Physiographic Division:  

Atlantic Lowland

Physiographic Province:  

Coastal Plain

Physiographic Section:  

Embayed Section

State Physiographic Area:  

 

Local Physiographic Area:  

Ninigret Pond

 

Geomorphic Setting:  

Mainland Submerged Beach

Upslope Shape:  

 

Cross Slope Shape:  

 

 

Primary Earth Cover:  

Salt Water

Secondary Earth Cover:  

 

Plant Association Name:  

 

Existing Vegetation:  

 

 

Parent Material:  

Sandy estuarine sediments

Bedrock Kind:  

 

Bedrock Depth:  

 

Bedrock Hardness:  

 

Bedrock Fracture Interval:  

 

 

Surface Fragments:  

 

 

Particle Size Control Section:  

 

 

Diagnostic Features:  

 

 

 

Profile Description:

A--0 to 10 centimeters; very dark gray (5Y 3/1), sandy loam; 1 percent shell fragments; abrupt boundary.

C1--10 to 15 centimeters; coarse sand; 5 percent shell fragments; abrupt boundary.

2C1--15 to 26 centimeters; dark gray (5Y 4/1), loamy sand; 30 percent mixed rock fragments; abrupt boundary.

2C2--26 to 36 centimeters; olive gray (5Y 4/2), loamy sand; abrupt boundary boundary.

2C3--36 to 56 centimeters; olive gray (5Y 4/2), coarse sand; 60 percent mixed rock fragments.

Map Unit Description (Bradley Stolt)

GMs(B) – Mainland Submerged Beach (sand phase), 2 – 4% slopes:   These soils are found in shallow (1.1 m or less) sand flats abutting the mainland shoreline or the GMb unit.  The subaqueous soils of this unit are characterized by a 5 – 15 cm surface horizon of very dark gray, and olive gray, fine and very fine sand of Holocene age.  Subsurface horizons are glacial fluvial material comprised of olive gray and dark grayish brown loamy coarse sand, and coarse sand, with 10 – 70% gravel and cobbles.  Most soils classify as Typic Endoaquents.  Submerged topography is moderately sloping and eelgrass cover is low (10%).

Field Description:

Horizon

Depth (cm)

Boundary

Field

n-value

Munsell

Munsell

Redox features

Field

Shell

Notes

 

lower

Dist.

Texture

 

Color

Color

Color/Conc.

Coarse

Frags %

 

 

boundary

 

Class

 

(matrix)

Name

 

Frags %

 

 

A

10

a

sl

 

5Y 3/1

very dark gray

 

 

1%

 

C1

15

a

cos

 

5Y 4/1

dark gray

 

 

5%

 

2C1

26

a

grls

 

5Y 4/2

olive gray

 

30%

 

 

2C2

36

a

ls

 

5Y 4/2

olive gray

 

 

 

 

2C3

56

 

vgrcos

 

5Y 4/2

olive gray

 

60%

 

 

 

Lab Analysis:

Horizon

Depth   (cm)

% Coarse Frags

% Shell Frags

% VCO   (1-2 mm)

% CO   (1-0.5 mm)

% M   (0.5-0.25 mm)

% F       (0.25-0.1 mm)

% VF (0.1-0.05 mm)

% Total Sand

% Silt

% Clay

USDA Texture Class

A1

10

1

0.19

5.2

13.6

13

0.5

58

90.3

8.6

1.1

vfs

C1

15

30.77

1.85

25.8

19.6

11.2

12.4

26.1

95.1

3.9

1

grcos

2C1

26

57.18

0

22.8

20.7

10.3

14.2

14

82

17

1

vgrlcos

2C2

36

7.91

0

20.6

32.7

16.2

6.2

7

82.7

15.2

2.1

lcos

2C3

56

71.43

0

24.3

32.2

18.5

0.1

14.9

90

9

1

egrlcos

Chemical Properties:

Horizon

Depth   (cm)

Total Nitrogen (%)

AVS (ug/g)

CRS (ug/g)

CaCO3 (%)

Organic Carbon (%)

A1

10

0.0000

9.0

266.0

0.3440

0.6344

C1

15

0.0343

0.0

5.4

0.3485

0.3776

2C1

26

0.0000

0.0

31.7

0.2457

0.5562

2C2

36

0.0699

0.0

7.3

0.5029

0.8395

 

VBI Soil Profile Photograph: