105
AB
C
D
Line 14
Beach
0
50
100
% Sand
Depth (cm)
0
100
150
200
300
250
50
Depth (cm)
0
100
150
200
300
250
50
Depth (cm)
0
100
150
200
300
250
50
0
100
150
200
300
250
50
0
50
100
% Sand
0
50
100
% Sand
0
50
100
% Sand
Beach
Figure 80: Fence Profile of Line 14
106
14 B
C
D
E
0cm
50cm
0cm
50cm
100cm
150cm
0cm
50cm
100cm
150cm
200cm
0cm
50cm
100cm
150cm
200cm
250 cm
300cm
Figure 81: Core Photographs of line 14
15
CORE 14E:
Core 14E was and taken at a water depth of 9.8m (32ft) (Table 1) and had a total
length of 75cm (29.5in) (Figures 103-104). A total of 7 grain size samples were taken at
depths of 1-10cm (0.4-3.9in), 21-30cm (8.3-11.8in) , 31-40cm (12.2 15.7in), 45-50cm
(17.7- 19.7in), 61-63cm (28-24.8in), 63-67cm (24.8-26.4in) and 73-75cm (28.7-29.5in).
This core was composed of mostly sandy mud, with a sand content of less than 60% for
the entire length of the core (Table 69). Sand and shell weights are shown in Table 68.
Percent sand, silt and clay are shown in Table 69. Median grain size. mean grain size,
skewness and sorting index are shown in Table 70. Graphs of the results are located in
Figures 105 and 106.
It was determined that core 14E had approximately 20cm (7.9in) of sediment contained at
least 50% sand, of which 20cm (7.9in) was located shallower than 1m (39.4in) depth.
132
Figure 103: Core Log of 14E for depths 0-75cm
Figure 104: Computerized core log of 14E
133
Core
ID
Sample
Depth
(cm)
#10/
2.0mm
Screen
Sample
Weight
(g)
#14/
1.40mm
Screen
Sample
Weight
(g)
#18/
1.00mm
Screen
Sample
Weight
(g)
#25/
710μm
Screen
Sample
Weight
(g)
#35/
500μm
Screen
Sample
Weight
(g)
#45/
355μm
Screen
Sample
Weight
(g)
#60/
250μm
Screen
Sample
Weight
(g)
#80/
180μm
Screen
Sample
Weight
(g)
#125/
125μm
Screen
Sample
Weight
(g)
#170/
90μm
Screen
Sample
Weight
(g)
#200/
75μm
Screen
Sample
Weight
(g)
#230/
63μm
Screen
Sample
Weight
(g)
14E
1-10
38.50
4.48
14E
21-30
5.79
2.91
14E
31-40
10.89
6.64
14E
45-50
2.44
2.62
14E
61-63
11.75
9.35
14E
63-67
1.60
1.25
14E
73-75
12.45
5.84
Table 67: RO-TAP data for core 14E
134
ASTM
Classification
coarse
sand
medium
sand
medium
sand
medium
sand
medium
sand
fine
sand
fine
sand
fine
sand
fine
sand
fine
sand
fine
sand silt
Wentworth
Classification
granule
very
coarse
sand
very
coarse
sand
coarse
sand
coarse
sand
medium
sand
fine
sand
fine
sand
fine
sand
very
fine
sand
very
fine
sand
very fine
silt
Core ID
Sample
Depth
(cm)
%
finer
than
N10/
2.0mm/
-1.0Φ
Screen
% finer
than
N14/
1.40mm
/ -0.5Φ
Screen
% finer
than
N18/
1.00mm/
0.0Φ
Screen
% finer
than
N25/
710μm
/ 0.5Φ
Screen
% finer
than
N35/
500μm/
1.0Φ
Screen
% finer
than
N45/
355μm
/ 1.5Φ
Screen
% finer
than
N60/
250μm
2.0Φ
Screen
% finer
than
N80/
180μm/
2.5 Φ
Screen
% finer
than
N125/
125μm/
3.0Φ
Screen
% finer
than
N170/
90μm /
3.5Φ
Screen
% finer
than
N200/
75μm /
4.0Φ
Screen
% finer
than
4μm/ 8Φ
Observed
Contents of
the sample
shell
only
shell
only
shell
only
shell
only
shell
only
shell
only
shell
only sand sand sand sand
silt
14E
1-10
40.0
20.2
14E
21-30
80.6
43.1
14E
31-40
74.8
27.9
14E
45-50
89.6
41.4
14E
61-63
68.8
21.0
14E
63-67
92.8
52.8
14E
73-75
65.2
11.2
Table 68: Percent Finer table for core 14E
135
Core ID
Sample Depth (cm)
shell weight
200+ weight
200-230 weight
sand + shell
14E 1-10
38.50
4.48
38.50
14E 21-30
5.79
