S05-RI-009-002A / RI009-2005-002A-NP
Washover Fan Flat; Ninigret Pond, Charlestown, RI
The Nagunt series consists of very deep, subaqueous soils on washover fan flats
and washover fan slopes in coastal lagoons. Nagunt soils are formed in fine sandy
to sandy marine deposits that are deposited as a result of washover events. Buried
surface horizons and stratification are often identified. Slope ranges from 0 to 6
percent.
Pedon Description:
C1--0 to 14 centimeters; light olive brown (2.5Y 5/3) interior, sand; 99 percent
sand; 0 percent silt; 1 percent clay; single grain; loose, nonsticky, nonplastic;
nonfluid; 1 percent flat shell fragments; abrupt; Lab sample # 06N02251.
Cg1--14 to 33 centimeters; gray (2.5Y 6/1) interior, sand; 99 percent sand; 1
percent silt; 0 percent clay; single grain; loose, nonsticky, nonplastic; nonfluid; 2
percent flat shell fragments; Common plant fragments matted in middle of core.;
clear; Lab sample # 06N02252.
Cg2--33 to 41 centimeters; 50 percent gray (5Y 5/1) interior and 50 percent dark
gray (5Y 4/1) interior, fine sand; 95 percent sand; 4 percent silt; 0 percent clay;
single grain; very friable, nonsticky, nonplastic; nonfluid; 1 percent flat shell
fragments; abrupt; Lab sample # 06N02253.
Ab1--41 to 54 centimeters; dark gray (2.5Y 4/1) interior, fine sand; 91 percent
sand; 8 percent silt; 1 percent clay; single grain; very friable, nonsticky,
nonplastic; nonfluid; 1 percent flat shell fragments; Few medium plant fragments
throughout.; clear; Lab sample # 06N02254.
Cg3--54 to 69 centimeters; gray (5Y 6/1) interior, sand; 99 percent sand; 1 percent
silt; 0 percent clay; single grain; loose, nonsticky, nonplastic; nonfluid; 1 percent
flat shell fragments; clear; Lab sample # 06N02255.
2Ab1--69 to 74 centimeters; sand; 87 percent sand; 10 percent silt; 3 percent clay;
massive; very friable, nonsticky, nonplastic; nonfluid; 1 percent flat shell
fragments; abrupt; Lab sample # 06N02256.
S05-RI009-002A_Nagunt.doc Nagunt
2Cg1--74 to 106 centimeters; gray (5Y 6/1) interior, sand; 99 percent sand; 0 percent silt;
1 percent clay; single grain; loose, nonsticky, nonplastic; nonfluid; 1 percent flat shell
fragments; Softshell clam = 6cm in diameter.; clear; Lab sample # 06N02257.
2Cg2--106 to 123 centimeters; dark gray (5Y 4/1) interior, sand; 98 percent sand; 1
percent silt; 0 percent clay; single grain; very friable, nonsticky, nonplastic; nonfluid; 1
percent flat shell fragments; Few very fine plant fragments.; clear; Lab sample #
06N02258.
2Cg3--123 to 143 centimeters; gray (5Y 5/1) interior, fine sand; 0 percent sand; 2 percent
silt; 98 percent clay; single grain; very friable, nonsticky, nonplastic; nonfluid; 1 percent
flat shell fragments; Scallop shell 1 cm diameter.; clear; Lab sample # 06N02259.
2Cg4--143 to 150 centimeters; gray (5Y 5/1) interior, fine sand; 98 percent sand; 2
percent silt; 0 percent clay; single grain; very friable, nonsticky, nonplastic; nonfluid; 1
percent flat shell fragments; Lab sample # 06N0226
Laboratory Data:
Horizon
C1
Cg1
Cg2
Ab1
Cg3
2Ab1
2Cg1
2Cg2
2Cg3
2Cg4
Depth (cm)
0-14
14-33
33-41
41-54
54-69
69-74
83-100
106-123
123-143
143-150
pH
7.9
6.8
7.4
4.2
7.4
nd
5.5
7.7
5.1
7.8
%C
0.16
0.13
0.27
0.27
0.07
0.39
0.07
0.15
0.1
0.14
%N
0.06
0.03
0.05
0.07
0.03
0.08
0.06
0.034
0.045
0.033
%S
0.05
0.05
0.12
0.15
0.06
0.17
0.05
0.06
0.09
0.05
Ca
4.2
0.8
4.1
0.8
2.3
5.2
0.5
1.3
0.6
1.6
Mg
0.7
0.7
2.0
2.7
0.7
2.6
0.5
1.8
2
1.8
Na
1.9
1.8
6.7
9.4
2.4
8.5
1.8
6.8
8.4
7.9
K
0.1
0.1
0.2
0.3
0.1
0.5
0.1
0.2
0.2
0.2
Horizon
C1
Cg1
Cg2
Ab1
Cg3
2Ab1
2Cg1
2Cg2
2Cg3
2Cg4
%VCS
1.3
2.5
0.7
0.5
0.6
1.6
1.1
4.1
0.2
0.3
%CS
20.6
15.1
4.7
6.0
11.8
15.0
22.1
11.2
2.1
2.7
%MS
46.8
37.2
9.9
15.6
53.7
31.3
51.0
30.7
14.1
15.2
%FS
28.2
39.5
62.2
38.1
27.7
21.9
24.1
46.3
65.6
69.4
%VFS
2.0
4.4
17.7
31.1
5.0
16.8
0.9
6.1
15.7
10.4
%Sand
99
99
92
91
99
87
99
98.4
97.7
98
%Silt
1
1
4
8
1
10
0
1.1
1.9
1.8
%Clay
1
0
0
1
0
3
1
0.5
0.4
0.2
Texture
sand
sand
fine sand
fine sand
sand
sand
sand
sand
fine sand
fine sand
S05-RI009-002A_Nagunt.doc Nagunt
General Information
General Description:
Location Description:
Location Map:
Description Date:
Describer:
Pedon ID:
Pedon Notes:
Lab Source ID:
Lab Pedon #:
Soil Name as Described/Sampled:
Soil Name as Correlated:
Classification(10th edition):
Classification (Wassents):
Water Depth (feet):
Primary Earth Cover:
Existing Vegetation:
Parent Material:
Particle Size Control Section:
Diagnostic Features:
Location Information
Country:
State:
County:
MLRA:
Soil Survey Area:
Quad Name:
Latitude:
Longitude:
Datum:
UTM Zone:
UTM Easting:
deep marine sands with buried surface horizons
Ninigret Pond, Charleston, RI. West basin on the
storm surge platform. From the DEM parking
area of the Ninigret Barrier follow 3,600 feet east
along the dune crest and 900 feet north.
TopoZone - USGS Quonochontaug (RI,MA)
Topo Map
09/01/2005
J. Turenne, M. Bradley
S05-RI-009-002B
Rossfelder Vibracore sample (4 in PVC tube),
Pedon sent to NSSL for Characterization, ID on
bag samples were labeled incorrectly (001). One
samples was left bagged, not kept cool, otheres
were kept below at least 50F.; Soil Name
Sampled As changed from Back Barrier Sand
Flat to Washover Fan Flat - 2007.
NSSL
06N0548
Washover Fan Flat
Nagunt
Mixed, mesic, Typic Psammaquents
Mixed, mesic, Fluventic Psammowassents
-1
water cover
Sandy washover deposits. sandy estuarine
deposits derived from igneous, metamorphic and
sedimentary rock
25 to 100 cm.
Reduced matrix 0-150 cm
United States
Rhode Island
WASHINGTON
149B -- Long Island-Cape Cod Coastal Lowland
RI600 -- State of Rhode Island: Bristol, Kent,
Newport, Providence, and Washington Counties
Quonochontaug, Rhode Island
41 degrees 20 minutes 59.00 seconds north
71 degrees 40 minutes 44.00 seconds west
NAD83
19
275884 meters
S05-RI009-002A_Nagunt.doc Nagunt
UTM Northing:
Physiographic Division:
Physiographic Province:
Physiographic Section:
State Physiographic Area:
Local Physiographic Area:
4581056 meters
Atlantic Lowland
Coastal Plain
Embayed section
Ninigret Pond
Location Map:
S05-RI009-002A_Nagunt.doc Nagunt
S05-RI009-002A_Nagunt.doc Nagunt