-
U.S. Department of the Interior U.S. Geological Survey
Station Locations and Grain-size Analysis of Surficial Sediment
Samples collected on the Continental Shelf,
Gulf of the Farallones ' during Cruise F2-89-NC, January
1989
by
Norman M. Maher1 , Herman A. Karl 1 , John L. Chin 1 , and
William C.Schwab2
Open-File Report 91-375-A
August 1, 1991
1 U.S. Geological Survey, Menlo Park, CA 94025 2U.S. Geological
Survey, Woods Hole, MA 02540
This report is preliminary and has not been reviewed for
conformity with U.S. Geological Survey editorial standards or with
the North American Stratigraphic Code. Any use of trade, product or
firm names is for descriptive purposes only and does not imply
endorsement by the U.S. Government.
-
INTRODUCTION
The U.S. Geological Survey began a major geologic and
oceanographic study of the
Gulf of the Farallones in 1989. This investigation, the first of
several planned adjacent to
major population centers, was designed to establish a good
scientific data base on a
segment of continental shelf adjacent to the San Francisco Bay
area so as to evaluate and
monitor human impact on the marine environment Two cruises were
conducted in January
1989 on the continental shelf between Cordell Bank and Half Moon
Bay east of the
Farallon Islands (Chin et al., 1989). Reconnaissance side-scan
sonar and high-resolution
seismic-reflection surveys were conducted along a rectilinear
grid of tracks spaced
nominally 4 km apart. This report describes the collection and
analysis of 268 surficial
sediment samples collected during the second cruise,
F2-89-NC.
DATA COLLECTION
A regional grid of 97 samples of surficial sediment was
collected with a Soutar Van
Veen sampler at the intersections of the reconnaissance
tracklines and, at other sites of
interest, at intervals of about 4 km (Fig. 1). A denser grid of
171 samples spaced
nominally 1 km apart was collected just east of the Farallon
Islands (Figs. 1 and 2).
Three systems were used to navigate the ship during the
sampling: (1) Global
Positioning System (GPS), (2) LORAN-C, and (3) a shore-based
transponder net. The
primary system used for real-time positioning was chosen either
manually by the navigator
or automatically by the computer. Positional accuracy varied
from about 100 m using GPS
and LORAN-C to a few meters using the shore-based transponder
net.
1
-
LABORATORY ANALYSIS
Grain -Size Analysis!
The following procedures used to determine grain-size
distribution of the sediment
samples were standardized by the U.S. Geological Survey Marine
Geology laboratory,
Menlo Park. Similar methods are described in Carver (1971) and
Theide and others
(1976).
Oxidation of of organic matter
5-10 g portions of sample were placed in a beaker with ,00 ml of
distilled water and 5 ml
of 30% hydrogen peroxide. The samples were stirred tc fully
disaggregate the sample and
heated overnight at 70-80° C to drive off excess H2°2 following
oxidation of organic
matter.
Removal of soluble salts
Following oxidation, the samples were washed into plastic 250 ml
bottles and centrifuged
at about 1700 rpm for 45 minutes. The water and soluble salts
were decanted, replaced
with distilled water, centrifuged a second time, and agaib
decanted.
Size segregation
After removal of soluble salts, the samples were wet sieved with
distilled water into three
size fractions: Gravel (>2 mm), sand (63 |i - 2 mm), ^nd mud
(silt + clay) (
-
liter mark with distilled water. Five ml of 10% sodium
hexametaphosphate solution was
added to disperse clay and clay size particles and prevent
flocculation.
Determining the weight and size distribution of the silt + clav
C) is a
logarithmic transformation of millimeters into whole integers,
according to the formula:
where d = grain diameter in millimeters.
-
The parameters calculated for these analyses include:
1) "median" - corresponds to the 50 percentile on a cumulative
curve, where half the
particles by weight are larger and half are smaller than the
median. This parameter is
measured in phi units.
2) "mean" - is the average grain-size. Several formulas
The most inclusive graphically derived value is that given
are used in calculating the mean,
by Folk (1968):
where 16,
-
to their degrees of symmetry. Folk's "inclusive graphic
skewness" (1968) is determined
by the equation:
sfcj -
-
platykurtic. For normal curves kg = 1.00, leptokurtic curves
have kg >1.00, and
platykurtic curves have kg
-
Note the area of dense stations (171 spaced 1 km apart) on
Figures 1 and 2. Sediment in
this area, based solely on analysis of samples from the regional
grid of stations, is
uniformly fine sand (Fig. 4). However, data from the 171 sample
grid of stations (also
plotted at a 1-phi interval) shows that the area actually
consists of a complex pattern of
mean grain sizes that range from fine to very coarse sand (Fig.
5). This level of sampling
density provides data important to interpretation of the modern
day depositional and
oceanographic processes operating in the Gulf of the
Farallones.
-
REFERENCES
Carver, R. E., 1971, Procedures in Sedimentary Petrography: New
York, John Wiley and Sons, 653 p.
Chin, J.L, Rubin, D.M., Karl, H.A., Schwab, W.C., and Twichell,
D.C., 1989, Cruise report for the Gulf of the Farallones cruise,
F1-89-NC, F2-89-NC off the San Francisco Bay Area, January 6
through 28,1989: U.S. Geological Survey Open-file Report 89-317, 4.
p.
Folk, R. L., 1968, Petrology of Sedimentary Rocks: Austin,
University of Texas
Publication, 170 p.
Inman, D. L., 1952, Measures for describing the size
distribution of sediments: Jour. Sedimentary Petrology, v. 22, #3,
p. 125 - 145.!
Jordan, F.J., Jr., Fryer, G.E., and Elze, H.H., 1971, Size
analysis of silt and clay by hydrophotometer: Jour. Sedimentary
Petrology, v. 41, p. 489-496
McHendrie, G., 1988, sdsz - A Program for Sediment Survey,
Branch of Pacific Marine Geology, Menlo
Size Analysis: U.S. Geological Park, CA.
Shepard, F. P., 1954, Nomenclature based on sand-sllt-clay
ratios: Jour. Sedimentary Petrology, v. 24, p. 151-158.
Thiede, J., Chriss, T., Clauson, M., and Swift, S.A., 1976,
Settling tubes for size analysis of fine and coarse fractions of
oceanic sediments: School of Oceanography, Oregon State University,
Reference 76-8, 87 p.
Trask, P. D., 1950, Dynamics of sedimentation Sedimentation: New
York, John Wiley and Sons
, in Trask, P. D., ed., Applied
, p. 3-40.
8
-
LIST OF FIGURES
Figure 1. Map showing location of all surficial sample stations
occupied on cruise F2-89-NC.
Figure 2. Locations of 171 samples collected just east of the
Farallon Islands.
Figure 3. Distribution of surface sediment texture.
Figure 4. Areal distribution of mean grain-size for the regional
grid of 97 samples.
Figure 5. Areal distribution of mean grain-size for the dense
grid of 171 samples.
-
38° 1
0'
37°3
0'
Sam
ple
Loca
tions
37°4
5* -
N
37°2
0'
123°
3012
2°45
'12
2°30
'12
2°15
' 12
2°10
'
Fig
ure
1
-
G92
37°5
1'
37°4
9'
37°4
5'
37"4
3'
SA
MP
LE
LO
CA
TIO
NS
Kilo
met
ers
M15
4 M
78
M76
G
?7*
M15
5
0 2
4
Bat
hym
etry
in m
eter
s
M1
63
M
68
«MB
7 M
16
4 M
90
M
48
M64
M7
M45
123°
10'
123°5
'12
3°1
22
-55
'
Figu
re 2
-
38°1
0'
38C
37°5
0'
J
37°4
0f
s
37°3
0'
37°2
0'
SU
RF
AC
E S
ED
IME
NT
TE
XT
UR
E
Kilo
met
ers
Bat
hym
etry
in m
eter
s
--
Duxb
ury
Pt
I'Sar
il Fr
ancis
c
-123
°30'
-123
°10'
-122
°50'
-122
°30'
-122
°10'
-
38°1
0'
38C
37°5
0'
J
37°4
0'
37°3
0*
37°2
0'
ME
AN
GR
AIN
SIZ
E
Bat
hym
etry
in M
eter
s
0-1
phi
Coar
se s
and
1-2
phi
Med
ium
san
d - - -
^t.
SBfv
Pedr
o
2-3
phi
Fine
san
d
3-4
phi
Very
fine
san
d
4-5
phi
Coar
se s
ilt
-123
°30'
-122
°10'
-
37°5
3'
37°5
V
ME
AN
GR
AIN
SIZ
E
37°4
5f
37M
31 123°
10'
123°
5'12
3e
122°
55*
-
LIST OF TABLES
Table 1. Grain-size comparison chart.
Table 2. Verbal classifications for graphically calculated
sorting, skewness, and kurtosis.
15
-
Table 1
GRAIN-SIZE COMPARISON CHART
Millimeters Phi () Wentworth Size Class
>2.00 < -1.0
1 .00 - 2.00
0.50 - 1
0
0
0
0
0
LOO
.25 - 0.50
.125-
.0625
.031-
.0156
0.0078
0.0039
0.25
- 0.125
0.0625
-0.031
- 0.0156
- 0.0078
8.00
.00
Gravel
Very Coarse Sand
Coarse Sand
.00 Medium Sand
.00 Fine Sand
.00 Very Fine
.00
.00
.00
Sand
Coarse Silt
Medium Silt
Fine Silt
.00 Very Fine
Clay
Silt
16
-
Table 2
Verbal classifications for erar>hicallv calculated sorting,
skewness and kurtosis:
SORTING
0.35(|>
0.35 - 0.50
0.50- 0.7 1$
0.71 - 1.0c|>
1.0 - 2.0(|>
2.0 - 4.0ct>
over 4.0c|)
very well sorted
well sorted
moderately well sorted
moderately sorted
poorly sorted
very poorly sorted
extremely poorly sorted
SKEWNESS
+1.00 to+0.30
+0.30 to+0.10
+1.0 to-0.10
-0.10 to-0.30
-0.30 to-1.00
strongly fine-skewed
fine-skewed
near symmetrical
coarse-skewed
strongly coarse-skewed
KURTQSIS
under 0.67
0.67 - 0.90
0.90- 1.11
1.11-1.50
1.50-3.00
over 3.00
very platykurtic
platykurtic
mesokurtic
leptokurtic
very leptokurtic
extremely leptokurtic
17
-
APPENDICES
Appendix I. Location, depth, and grain-size parameters
Appendix II. Location, depth, and grain-size parameters
for the 97 regional samples,
for the 171 sample grid.
18
-
APPENDIX I
19
-
Sam
ple
ID
G1
G2
G3
G4
G5
G6
G7
G8
G9
G10
G11
G12
G13
G14
G15
G16
G17
G18
G19
G20
G21
G22
G23
G24
Latit
ude
37
.93
49
4
37.9
5555
37
.97
37
5
37
.99
46
7
38
.01
17
3
38
.02
65
2
38.0
4293
38
.06
24
4
37
.89
16
4
37.9
1335
37.9
2994
37
.94
73
6
37.9
6555
37
.97
96
4
37
.99
83
3
38
.01
82
1
37
.83
70
2
37
.85
83
0
37
.87
70
0
37.8
9647^
37.9
1470
37.9
2921
37
.95
39
6
37
.95
58
9
Long
itude
-12
3.3
89
16
-123.3
5440
-123.3
1955
-123.2
8257
-123.2
4715
-12
3.2
20
30
-12
3.1
83
58
-12
3.1
50
92
-12
3.3
56
57
-123.3
1981
-12
3.2
85
22
-12
3.2
46
31
-123.2
0976
-123.1
8377
-12
3.1
51
91
-12
3.1
14
42
-123.3
2305
-12
3.2
79
53
-12
3.2
44
19
-123.2
0708
-123.1
7167
-12
3.1
47
09
-123.1
0461
-12
3.0
76
93
Dep
th
(met
ers) 1
19
10
4
108
1 13
1 10
108
99
84
113
10
6
106
102
102
102
90
73
117
10
2
99
95
95
95
82
76
Per
cent
Gra
vel 0.0
0
4.6
6
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
Per
cent
San
d
93.7
2
93.7
0
98.7
5
97.0
6
89.5
5
77.5
8
7.0
6
13
.59
94.9
5
93.1
0
92
.25
96.9
9
91
.57
57.3
2^
9.21
27.8
4
96.3
0
91.2
0
90.9
1
95.0
8
91.9
7
65
.83
14.7
1
23
.29
Per
cent
Silt
5.6
7
0.6
6
0.5
0
2.4
7
9.6
2
21
.22
87
.78
83.2
8
4.0
6
5.61
4.6
5
1.2
0
7.7
4
39
. //
86.6
1
69.4
8
2.8
3
7.01
8.2
6
4.4
0
7.2
5
31
.83
82
.14
73
.07
Per
cent
Cla
y 0.61
0.9
8
0.7
5
0.4
7
0.8
3
1.2
0
5.1
6
3.1
3
0.9
9
1.2
8
3.1
0
1.81
0.6
9
2.91
4.1
8
2.6
8
0.8
7
1.8
0
0.8
4
0.5
2
0.7
7
2.3
4
3.1
5
3.6
4
Per
cent
Mud
6.2
8
1.6
4
1.2
5
2.9
4
10.4
5
22.4
2
92.9
4
86.4
1
5.0
5
6.9
0
7.7
5
3.01
8.4
3
42
.68
90.7
9
72.1
6
3.7
0
8.8
0
9.0
9
4.9
2
8.0
3
34
.17
85.2
9
76.7
1
San
d/M
ud
Rat
io
14.9
3
57
.10
78
.85
32
.96
8.5
7
3.4
6
0.0
8
0.1
6
18.8
2
13.4
9
11
.90
32
.20
10
.86
1.3
4
0.1
0
0.3
9
26
.02
10.3
6
10
.00
19.3
3
11
.46
1.9
3
0.1
7
0.3
0
Sta
ndar
d
L_ D
evia
tion
1.6
9
1.26
0.9
4
0.6
4
1.0
3
^_
1.3
9
1.4
2
1.32
1.15
1.2
4
1.4
4
1.26
0.9
3
i.et
1.3
3
1.38
1.5
5
1.4
2
0.9
5
0.7
3
1.4
5
1.5
8
1.3
6
1.5
8
-
Sam
ple
ID
G1
G2
G3
G4
G5
G6
G7
G8
G9
G10
G11
G12
G13
G14
G15
G16
G17
G18
G19
G20
G21
G22
G23
G24
Firs
t
Mom
ent
2.3
2
1.25
2.1
2
3.3
0
3.3
3
3.5
0
5.3
3
4.8
8
3.0
3
3.1
0
3.3
6
3.1
0
3.4
2
4.1
3
5.0
5
4.5
7
1.62
3.1
7
3.3
6
3.3
0
2.6
3
3.7
8
4.9
6
4.6
7
Sec
ond
Mom
ent
2.8
4
1.58
0.8
8
0.4
2
1.06
1.94
2.0
2
1.75
1.31
1.53
2.0
6
1.59
0.8
6
2.5
8
1.7
7
1.89
2.41
2.0
2
0.9
0
0.5
3
2.11
2.51
1.85
2.5
0
Thi
rd
Mom
ent
0.2
8
3.6
5
4.9
2
7.5
7
3.4
5
2.0
0
2.2
4
2.3
0
2.0
9
2.7
8
3.2
6
2.6
0
5.1
7
1.8
2
2.2
6
1.8
9
2.3
4
2.7
7
4.4
5
6.5
3
1.1
7
1.7
4
2.2
4
1.3
7
Fou
rth
Mom
ent
4.7
3
24.3
6
36.7
8
80.4
9
24
.71
11
.67
9.4
1
11
.75
16
.12
18
.48
14
.10
15
.38
36.8
5
8.0
8
10
.65
9.4
5
11
.93
15
.33
34.5
4
61.4
9
8.1
4
8.31
10
.62
7.5
1
Med
ian
3.01
1.11
1.93
3.2
4
3.1
7
3.1
5
4.9
3
4.5
7
3.0
2
3.01
3.0
4
3.01
3.2
5
3.5
8
4.6
9
4.4
6
1.04
3.0
0
3.2
3
3.2
2
3.1
3
3.21
4.6
7
4.4
4
Mea
n 2.2
0
1.18
2.11
3.2
2
3.2
2
3.4
4
5.2
2
4.7
5
3.0
2
2.81
3.1
6
3.0
5
3.2
5
3.91
4.91
4.41
1.51
2.9
6
3.2
2
3.1
5
2.4
9
3.6
3
4.8
2
4.4
6
Sor
ting
1.50
0.7
2
0.41
0.2
8
0.6
0
0.9
9
1.15
0.9
7
0.8
0
0.8
9
0.5
8
0.61
0.4
3
1.30
0.9
9
1.19
1.22
0.9
5
0.4
6
0.3
0
1.23
1.28
1.07
1.37
Ske
wne
ss
-0.6
1
0.0
7
0.5
5
-0.0
6
0.1
8
0.5
5
0.4
5
0.3
8
-0.2
0
-0.2
0
0.3
3
-0.0
9
0.2
2
0.4
9
0.4
7
0.0
8
0.4
9
0.1
0
0.1
3
-0.1
9
-0.6
8
0.5
6
0.31
0.1
5
Ku
rto
sis
0.6
0
2.5
5
1.1
2
2.7
5
1.64
1.3
0
1.56
1.9
2
1.9
2
2.5
3
1.68
1.71
3.61
1.01
1.9
2
1.6
2
0.7
5
2.2
0
2.6
7
30
.51
1.5
0
1.1
8
1.9
6
1.9
9
-
ro
ro
Sam
ple
ID
G25
G26
G27
G28
G29
G30
G31
G32
G33
G34
G35
G36
G37
G38
G39
G40
G41
G42
G43
G44
G45
G46
G47
G48
Latit
ude
37.8
2920
37
.84
53
6
37.8
6065
37.8
7759
37.8
9687
37
.91
41
8
37.9
4329
37.9
6941
37.8
2592
37
.84
36
3
37.8
6269
37
.87
76
2
37.8
9175
37.9
1101
37.7
3207
37
.74
34
3
37.7
5718
37.7
7592
37
.79
52
5
37.8
1380
37.8
3346
37
.85
57
5
37.6
9082
37.7
0578
Long
itude
-123.1
1513
-123.0
8605
-123.0
581
6
-12
3.0
26
89
-122.9
9469
-12
2.9
58
72
-12
2.9
07
24
-12
2.8
57
98
-12
2.9
73
84
-122.9
3931
-12
2.9
04
86
-12
2.8
82
00
-122.8
6136
-122.8
3202
-123.0
0782
-12
2.9
82
78
-122.9
5761
-12
2.9
23
86
-12
2.8
87
77
-12
2.8
51
99
-12
2.8
18
78
-12
2.7
72
29
-122.9
2862
-122.9
0347
Dep
th
(met
ers) 8
6
88
88
84
73
64
46
38
74
68
60
59
53
40
56
58
58
59
55
53
48
40
55
57
Per
cent
Gra
vel 0.0
4
34.2
4
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
19
.92
0.0
0
0.0
0
0.0
0
1.00
0.0
0
0.0
0
0.0
0
0.0
0
O.O
Oj
0.0
0
0.0
0
13.0
0
0.0
0
Per
cent
San
d
99.3
9
55.3
8
76.0
5
57.9
6
43
.53
56.9
2
39.1
8
23.6
8
95.0
4
95.3
8
77.0
8
96.2
3
65.0
6
77.4
5
98.7
8
99.8
1
99
.56
99.1
2
99.2
6
98.3
4
86
.47
72.3
5
86.9
9
99.6
8
Per
cent
Silt 0
.46
9.0
2
21.2
8
40.4
2
54.5
8
42.2
5
59.9
1
74.6
8
4.4
2
1.85
1.20
1.51
33
.78
21.9
8
0.0
9
0.0
7
0.1
8
0.3
5
0.3
0
0.6
7
12.9
9
26.9
6
0.0
0
0.1
3
Per
cent
L_
Cla
y 0.11
1.36
2.6
7
1.62
1.8
8
0.8
2
0.91
1.63
0.5
5
2.7
7
1.8
0
2.2
6
1.1
6
0.5
7
0.1
3
0.11
0.2
6
0.5
3
0.4
4
1.00
0.5
3
0.6
9
0.0
0
0.1
9
Per
cent
Mud
0.57
10.3
7
23
.95
42
.04
56
.47
43
.08
60
.82
76.3
2
4.9
6
4.6
2
3.01
3.7
7
34
.94
22
.55
0.2
2
0.1
9
0.4
4
0.8
8
0.7
4
1.66
13.5
3
27
.65
0.01
0.3
2
San
d/M
ud
Rat
io
173.2
7
5.3
4
3.1
8
1.38
0.7
7
1.32
0.6
4
0.31
19.1
4
20.6
4
25.6
5
25.5
5
1.8
6
3.4
3
. 448.8
7
538.3
0
22
6.8
1
112.8
9
134.5
2
59
.10
6.3
9
2.6
2
9999.9
0
313.0
4
Sta
ndar
d
Dev
iatio
n
0.83
2.38
1.73
1.2
7
1.3
3
1.01
0.8
9
1.0
7
0.9
0
1.5
0
1.7
6
1.43
1.1
2
0.7
6
0.7
9
0.6
7
0.6
6
0.8
2
0.8
4
0.9
4
0.9
3
1.0
5
0.9
7
0.7
3
-
ro
u>
Sam
ple
ID
G25
G26
G27
G28
G29
G30
G31
G32
G33
G34
G35
G36
G37
G38
G39
G40
G41
G42
G43
G44
G45
G46
G47
G48
Firs
t
Mom
ent
1.67
1.79
3.4
5
3.9
7
4.11
3.9
0
4.1
7
4.51
3.0
0
2.9
9
0.4
4
2.4
8
3.6
6
3.71
1.74
2.3
3
2.51
2.3
0
2.3
6
2.7
2
3.2
6
3.5
0
0.6
7
2.1
6
Sec
ond
Mom
ent
0.69
5.6
9
2.9
9
1.62
1.78
1.03
0.7
9
1.15
0.81
2.2
6
3.0
9
2.0
6
1.25
0.5
8
0.6
2
0.4
5
0.4
3
0.6
7
0.7
0
0.8
8
0.8
6
1.0
9
0.9
5
0.5
4
Thi
rd
Mom
ent
1.9
0
0.51
1.92
2.3
8
1.76
2.3
9
3.6
7
2.9
7
3.2
6
2.71
3.4
5
3.3
6
L 2.4
2
4.5
8
1.0
2
0.8
0
3.6
4
4.5
4
2.9
3
4.8
0
2.9
0
1.6
2
-0.2
2
1.14
Fou
rth
Mom
ent
18.7
1
3.7
0
8.7
0
11
.97
11.0
1
17.9
7
26.6
1
18.2
1
30.9
9
12.2
6
17.1
5
16.4
1
16.5
6
37.9
2
19
.64
22.3
6
44
.21
40
.68
31
.29
34.1
3
24.9
4
14.8
0
2.6
7
29.6
8
Med
ian
1.48
2.9
4
2.9
8
3.4
8
4.1
4
3.81
4.0
7
4.3
9
2.9
2
2.8
5
0.2
5
2.2
9
3.4
7
3.5
4
1.72
2.41
2.51
2.31
2.4
7
2.5
3
3.0
2
3.3
6
0.9
3
2.21
Mea
n 1.72
1.70
3.4
0
3.7
8
3.9
9
3.8
3
4.01
4.3
8
2.8
9
2.7
8
0.0
7
2.3
2
3.5
2
3.6
2
1.74
2.31
2.4
9
2.3
3
2.4
0
2.5
7
3.2
0
3.4
0
0.7
0
2.1
9
Sort
ing_
0.6
5
1.9
9
1.4
2
1.02
1.01
0.7
2
0.5
9
0.7
6
0.3
5
0.6
7
1.06
0.5
9
0.7
7
0.5
0
0.6
3
0.4
7
0.4
3
0.4
5
0.5
0
0.41
0.6
2
0.6
6
0.9
7
0.4
6
Ske
wne
ss
0.46
-0.5
7
0.51
0.5
2
-0.0
3
0.0
8
-0.0
2
0.1
0
0.0
4
-0.1
8
0.0
3
0.0
4
0.1
8
0.2
8
0.01
-0.2
0
-0.0
7
-0.0
8
-0.3
8
0.2
0
0.3
5
0.1
7
-0.3
2
-0.2
6
Kur
tosi
s
1.15
0.61
2.2
4
1.02
1.17
1.0
9
1.23
1.89
1.69
0.9
9
1.2
3
1.33
0.9
0
0.8
7
1.4
2
1.38
1.9
0
0.9
0
1.05
1.19
1.89
0.7
9
0.8
6
1.5
3
-
f\3
Sam
ple
ID
G50
G51
G52
G53
G54
G55
G56
G57
G58
G59
G60
G61
G62
G63
G64
G65
G66
G67
G68
G69
G70
G71
G72
G73
Latit
ude
37.7
4153
37
.76
21
5
37.7
8643
37.8
1364
37
.61
96
7
37.6
3793
37
.65
11
7
37.6
7056
37
.69
04
1
37
.70
79
8
37
.73
94
0
37.7
6096
37.5
5080
37
.57
16
7
37.5
9038
37.6
0342
37.6
2208
37
.64
07
5
37
.66
00
3
37.6
7802
37.6
9143
37.5
0130
37.5
2028
37.5
3859
Long
itude
-122.8
3417
-122.8
0375
-122.7
598
6
-12
2.7
12
66
-122.9
0467
-12
2.8
71
54
-122.8
4738
-122.8
1462
-122.7
8189
-12
2.7
47
51
-122.6
9398
-12
2.6
56
20
-122.8
9766
-12
2.8
56
99
-122.8
2450
-12
2.8
00
27
-122.7
6494
-122.7
302
4
-122.6
9633
-12
2.6
66
47
-122.6
435
4
-122.8
4047
-12
2.8
05
40
-122.7
7157
Dep
th
(mete
rs) 53
53
42
31 82
69
62
53
51 42
33 22
99
86
73
64
53
46
38
33 29
91 86
73
Per
cent
Gra
vel 0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
Per
cent
San
d
99.5
8
99.0
6
96.7
7
86.3
0
41.0
2
62.1
8
73.9
6
93.9
0
86.4
8
96.2
1
86.3
6
95.9
8
89
.27
70.2
1
41.6
1
47
.63
57.4
2
65.2
5
63.1
8
90.9
1
84.9
7
92.0
0
88.2
4
59.8
0
Per
cent
Silt
0.1
7
0.3
7
1.29
13.2
7
56
.9^
36
.17
25
.10
5.7
6
13.0
7
1.5
2
13.3
3
1.61
9.7
2
28.6
0
56.0
3
50
.91
41
.77
34
.28
35.8
8
8.9
0
14.7
3
7.4
0
10.9
6
39.0
3
Per
cent
Cla
y 0.2
5
0.5
6
1.94
0.4
2
2.04
1.65
0.9
4
0.3
4
0.4
4
2.2
7
0.3
2
2.41
1.0
0
1.19
2.3
6
1.46
0.8
2
0.4
7
0.9
4
0.1
9
0.2
9
0.6
0
0.7
9
1.1
7
Per
cent
Mud
0.42
0.9
4
3.2
3
13.7
0
58.9
8
37.8
2
26.0
4
6.1
0
13.5
2
3.7
9
13.6
4
4.0
2
10.7
3
29.7
9
58.3
9
52
.37
42
.58
34.7
5
36.8
2
9.0
9
15.0
3
8.0
0
11.7
6
40
.20
San
d/M
ud
Rat
io
238.5
4
105.9
4
29.9
8
6.3
0
0.7
0
1.6
4
2.8
4
15.3
9
6.4
0
25
.38
6.3
3
23
.87
8.3
2
2.3
6
0.71
0.91
1.3
5
1.8
8
1.7
2
10
.00
5.6
6
11.5
0
7.51
1.4
9
Sta
ndar
d
Dev
iatio
n
0.72
0.8
5
1.1
3
0.7
4
1.21
1.2
8
1.11
0.7
6
0.8
9
1.3
8
0.6
2
1.3
4
1.3
0
1.2
2
1.2
6
1.0
3
0.9
9
0.7
2
0.9
3
0.5
7
0.6
5
0.7
9
0.8
8
1.0
9
-
ro
en
Sam
ple
ID
G50
G51
G52
G53
G54
G55
G56
G57
G58
G59
G60
G61
G62
G63
G64
G65
G66
G67
G68
G69
G70
G71
G72
G73
Firs
t
Mom
ent
1.58
2.2
6
3.3
6
3.51
4.1
9
3.7
0
3.3
8
2.7
3
3.04
2.5
8
3.5
2
3.1
3
3.2
3
3.6
5
4.3
7
4.0
7
3.8
5
3.8
2
3.8
2
3.41
3.5
5
3.2
7
3.4
0
3.8
7
Sec
ond
Mom
ent
0.51
0.7
2
1.27
0.54
1.47
1.64
1.24
0.5
8
0.8
0
1.89
0.3
9
1.78
1.70
1.49
1.58
1.07
0.9
9
0.5
2
0.8
7
0.3
2
0.4
2
0.6
2
0.7
7
1.18
Thi
rd
Mom
ent
4.3
8
4.2
2
3.7
4
4.5
0
2.8
5
2.51
2.51
5.0
7
3.0
8
3.7
6
5.4
4
3.2
0
1.12
1.73
3.0
2
3.4
0
1.96
4.3
7
3.5
2
4.41
4.7
0
5.5
0
4.61
2.5
7
Fou
rth
Mom
ent
45.7
8
39.0
1
20.7
0
42.3
3
15
.83
14.1
5
17
.04
43.7
6
23.4
7
18.0
6
55
.77
15.3
3
11.5
5
15.6
1
16.7
0
23.9
2
21.2
8
40
.17
25.2
1
56.3
1
46.7
5
49.7
2
36
.55
19.1
8
Med
ian
1.43
2.2
8
3.2
2
3.3
7
4.0
7
3.31
2.9
7
2.6
4
2.8
0
2.3
7
3.2
7
3.0
3
3.3
9
3.5
6
4.2
6
4.0
2
3.8
6
3.7
4
3.61
3.3
3
3.4
3
3.1
7
3.1
4
3.7
2
Mea
n 1.53
2.3
0
3.2
2
3.4
9
3.9
9
3.5
3
3.3
0
2.61
3.01
2.2
3
3.4
3
2.9
4
3.3
4
3.6
5
4.1
4
3.9
5
3.81
3.6
8
3.6
6
3.41
3.5
4
3.1
5
3.2
7
3.7
3
Sor
ting
0.4
8
0.4
0
0.4
0
0.4
2
0.8
6
0.9
0
0.7
4
0.5
4
0.7
0
0.5
0
0.3
9
0.6
0
0.8
5
0.7
6
0.7
2
0.6
2
0.5
3
0.4
8
0.5
2
0.3
3
0.41
0.4
8
0.51
0.6
6
Ske
wne
ss
0.36
-0.1
4
0.06
0.41
0.0
4
0.4
2
0.6
0
0.1
8
0.4
4
-0.1
0
0.5
8
-0.2
0
-0.3
2
0.0
2
0.01
-0.0
3
-0.0
7
0.0
0
0.3
2
0.3
3
0.3
3
0.1
3
0.4
3
0.1
8
Kurt
osi
s
0.8
7
1.2
5
1.21
2.1
8
1.53
0.8
2
0.61
2.0
3
1.41
1.11
0.7
7
1.4
6
3.61
1.51
1.1
0
0.9
6
0.91
0.81
0.8
8
2.9
7
1.78
1.81
1.6
2
0.8
5
-
ro
Sam
ple
ID
G74
G75
G76
G77
G78
G79
G80
G81
G82
G83
G84
G85
G86
G87
G88
G89
G90
G91
G92
G93
G94
G95
G96
G97
Latit
ude
37
.55
27
0
37.5
7315
37
.59
16
6
37.6
1192
37.6
3853
37.6
5847
37.4
2887
37.4
5164
37.4
7010
37.4
8016
37.4
9995
37.5
2064
37.5
4711
37
.42
06
8
37.4
2939
37.4
4613
37
.46
22
7
37.8
5476
37
.87
50
2
37.8
8958
37.9
0495
37.9
2123
37.9
3472
37
.95
16
1
Long
itude
-122.7
4916
-122.7
1492
-122.6
8055
-12
2.6
47
77
-12
2.6
02
44
-12
2.5
64
03
-12
2.7
68
07
-12
2.7
33
32
-122.7
0071
-122.6
7931
-12
2.6
42
24
-12
2.6
09
95
-12
2.5
64
64
-12
2.6
49
98
-12
2.6
26
28
-122.5
8218
-12
2.5
47
69
-12
3.1
76
90
-12
3.1
41
65
-123.1
1449
-12
3.0
85
21
-12
3.0
55
03
-123.0
3178
-12
3.0
00
29
Dep
th
(met
ers) 6
6
55
66
38
29
25
88
81 73
68
59
51 35
82
69
58
45
95
93
91 88
77
66
58
Per
cent
Gra
vel 0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
Per
cent
San
d
52.7
6
51.2
8
64.1
5
74.7
9
89.2
9
92.9
1
92.1
1
78.1
2
56.4
7
40
.07
37.3
8
64.2
0
90.1
7
50.3
6
70.1
4
93.5
6
94.3
4
93.8
6
92.8
5
79.6
0
45.1
6
26.1
4
72.5
9
45.7
9
Per
cent
Silt 45
.93
48.0
0
35.4
3
24.5
6
10.3
9
6.8
2
6.4
6
21.0
4
42.5
3
58.6
4
61.8
6
35.1
6
9.4
7
47.7
2
28.9
8
6.0
3
5.2
9
5.3
6
6.3
4
18.7
0
52.1
3
70.4
0
26.1
0
51.7
7
Per
cent
Cla
y 1.31
0.72
0.4
2
0.6
5
0.3
2
0.2
6
1.42
0.8
5
0.9
9
1.2
9
0.7
6
0.6
4
0.3
6
1.92
0.8
8
0.4
0
0.3
7
0.7
8
0.81
1.6
9
2.71
3.4
7
1.31
2.4
4
Per
cent
Mud 4
7.2
4
48
.72
35.8
5
25.2
1
10.7
1
7.0
9
7.8
9
21.8
8
43.5
3
59.9
3
62.6
2
35.8
0
9.8
3
49.6
4
29.8
6
6.4
4
5.6
6
6.1
4
7.1
5
20.4
0
54.8
4
73.8
6
27.4
1
54.2
1
San
d/M
ud
Rat
io 1.1
2
1.0
5
1.7
9
2.9
7
8.3
4
13.1
1
11.6
8
3.5
7
1.3
0
0.6
7
0.6
0
1.7
9
9.1
8
1.01
2.3
5
14.5
3
16.6
7
15
.29
12.9
8
3.9
0
0.8
2
0.3
5
2.6
5
0.8
4
Sta
ndar
d
Dev
iatio
n
1.05
0.85
0.80
0.8
3
0.9
3
0.6
5
1.01
1.16
0.9
5
1.0
3
0.91
1.1
2
0.6
8
i/re
1.2
2
1.0
3
1.0
6
0.8
6
0.9
3
1.3
7
1.5
6
1.4
3
1.2
8
1.6
4
-
r>o
Sam
ple
ID
G74
G75
G76
G77
G78
G79
G80
G81
G82
G83
G84
G85
G86
G87
G88
G89
G90
G91
G92
G93
G94
G95
G96
G97
First
Mom
ent
4.0
8
3.9
9
3.7
8
3.7
3
3.2
8
3.3
3
3.4
5
3.4
7
3.9
4
4.2
2
4.11
3.6
9
3.4
5
4.11
3.4
3
2.4
0
2.7
3
3.2
9
3.1
6
3.5
7
4.1
9
4.6
2
3.4
9
4.0
7
Sec
ond
Mom
ent
1.10
0.72
0.6
4
0.6
9
0.8
7
0.4
2
1.0
2
1.3
5
0.91
1.0
6
0.8
2
1.2
5
0.4
6
1.3
4
1.4
9
1.0
5
1.1
2
0.7
3
0.8
7
1.8
8
2.4
3
2.0
5
1.6
3
2.6
9
Th
ird
Mom
ent
3.3
8
3.3
6
2.1
4
4.2
9
0.4
3
3.9
2
5.5
0
1.5
7
3.0
8
3.1
9
2.31
0.9
4
6.1
1
3.7
0
1.4
7
2.3
6
2.3
7
4.8
5
4.2
9
2.9
0
1.7
3
1.7
9
2.4
8
1.3
6
Fou
rth
Mom
ent
22.4
1
28.1
1
24.0
3
33.0
7
15.0
9
48
.04
39.3
9
15
.48
23.8
7
21.4
6
21
.11
11
.87
59
.96
22
.17
12
.17
18
.48
20.1
9
42.3
9
33
.81
14
.26
8.2
6
9.1
3
12
.55
6.7
3
Med
ian
3.92
3.97
3.68
3.49
3.33
3.26
3.16
3.39
3.86
4.2
4
4.1
5
3.4
9
3.31
3.9
9
3.2
4
2.3
3
2.8
3
3.2
1
2.9
9
3.1
9
4.2
5
4.4
9
2.9
5
4.1
5
Mea
n 3.8
8
3.8
9
3.6
7
3.61
3.4
0
3.2
7
3.2
6
3.4
9
3.8
1
3.9
9
4.0
2
3.6
8
3.4
4
3.9
0
3.3
8
2.3
2
2.6
5
3.1
4
2.9
6
3.4
6
4.0
4
4.4
2
3.4
5
3.9
6
Sor
ting
0.6
7
0.5
7
0.5
1
0.5
2
0.6
3
0.3
8
0.4
7
0.7
3
0.5
7
0.6
9
0.6
5
0.7
8
0.3
2
0.6
6
0.8
2
0.7
0
0.8
9
0.3
7
0.4
2
1.0
2
1.3
3
1.2
0
0.8
9
1.4
5
Ske
wne
ss
0.04
-0.1
0
0.07
0.41
-0.0
8
0.06
0.51
0.0
4
0.0
0
-0.3
0
-0.1
8
0.2
5
0.7
7
-0.0
6
0.2
3
0.0
7
-0.1
9
-0.1
0
0.1
5
0.5
6
-0.0
1
0.0
7
0.8
1
-0.0
3
Ku
rto
sis
0.7
1
0.9
9
0.8
3
0.9
2
2.7
1
1.31
2.1
8
1.7
8
0.9
7
0.7
7
0.9
3
1.1
9
1.7
5
0.7
4
1.0
0
1.6
2
1.1
5
6.5
5
1.2
5
2.5
3
0.9
3
1.71
0.9
3
1.0
4
-
APPENDIX II
28
-
Sam
ple
ID
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
M13
M14
M15
M16
M17
M18
M19
M20
M21
M22
M23
M24
Latit
ude
37
.73
97
7
37.7
4647
37.7
5352
37.7
5959
37
.76
63
7
37.7
7243
37
.77
88
5
37.7
8578
37.7
9248
37
.79
90
0
37
.80
54
7
37.8
1195
37.8
1843
37
.82
47
1
37.8
3165
37.8
3760
37
.84
46
3
37
.85
06
2
37.8
5804
37
.73
62
1
37
.74
28
2
37.7
4960
37.7
5554
37.7
6254
Long
itude
-122.9
7913
-122.9
8581
-122.9
9245
-122.9
9883
-123.0
0511
-123.0
1165
-12
3.0
18
17
-12
3.0
25
14
-123.0
3179
-123.0
3822
-123.0
4437
-123.0
5087
-12
3.0
57
25
-12
3.0
63
87
-123.0
7044
-12
3.0
76
92
-12
3.0
83
82
-123.0
8957
-12
3.0
97
23
-12
2.9
86
92
-12
2.9
93
54
-12
2.9
99
92
-123.0
0695
-123.0
1357
Dep
th
(me
ters
) 57
60
62
66
66
67
71 71 73
73
75
79
79
81 84
88
88
88
88
59
62
64
64
66
Per
cent
Gra
vel 0.00
0.00
60.4
7
0.99
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
3.31
0.00
0.00
0.00
0.00
41.5
0
0.00
Per
cent
San
d
97.9
7
99.2
5
39.4
1
98.0
4
99.5
4
97.5
7
98
.68
98
.86
98
.85
98.7
7
98.3
9
99
.12
98.3
0
96.6
7
96
.69
95.0
5
94
.01
90.0
8
84
.23
98.6
8
99
.22
99.3
8
57
.80
99.1
0
Per
cent
Silt 0
.81
0.30
0.05
0.39
0.18
0.97
0.53
0.45
0.46
0.49
0.64
0.35
0.68
1.53
1.33
3.68
5.18
5.54
13.7
5
0.53
0.31
0.25
0.28
0.36
Per
cent
Cla
y 1.22
0.4
5
0.0
7
0.5
8
0.2
8
1.4
6
0.7
9
0.6
8
0.6
9
0.7
4
0.9
7
0.5
3
1.0
2
1.8
0
1.9
9
1.2
7
0.8
2
1.0
7
2.0
2
0.7
9
0.4
7
0.3
7
0.4
2
0.5
4
Per
cent
Mud
2.03
0.75
0.12
0.97
0.46
2.4
3
1.3
2
1.1
4
1.1
5
1.2
3
1.61
0.8
8
1.7
0
3.3
3
3.3
1
4.9
5
5.9
9
6.6
1
15
.77
1.3
2
0.7
8
0.6
2
0.7
0
0.9
0
San
d/M
ud
Rat
io
48
.24
132.
26
320.3
7
101.
04
216.8
8
40.2
0
74
.72
86.9
3
86
.16
80
.58
61
.13
112.
89
57
.88
29.0
1
, 2
9.1
8
19.2
0
15.6
8
13.6
3
5.34
74.5
7
127.
31
160.3
5
82
.69
110.
33
Sta
ndar
d
Dev
iatio
n
1.02
0.74
0.94
1.16
0.70
1.11
0.90
0.85
0.84
0.91
0.97
0.81
0.95
1.11
1.19
1.26
1.16
1.48
1.45
0.91
0.82
0.76
1.23
0.80
-
Sam
ple
ID
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
M13
M14
M15
M16
M17
M18
M19
M20
M21
M22
M23
M24
Firs
t
Mom
ent
2.4
7
2.4
5
-0.3
7
0.4
2
2.3
5
2.7
0
2.5
5
2.5
6
2.7
0
2.5
2
2.54
2.5
9
2.71
3.01
3.0
2
2.91
2.6
8
2.8
3
3.4
3
2.3
3
2.41
2.2
3
0.0
2
2.3
9
Sec
ond
Mom
ent
1.04
0.5
5
0.8
8
1.34
0.4
9
1.23
0.8
0
0.7
2
0.71
0.8
3
0.9
4
0.6
5
0.9
0
1.23
1.41
1.59
1.36
2.1
9
2.1
0
0.8
4
0.6
8
0.5
8
1.52
0.64
Thi
rd
Mom
ent
4.7
6
4.0
2
2.2
0
4.2
2
3.3
2
4.2
3
4.6
0
4.5
2
4.4
6
3.9
5
4.5
5
3.6
8
4.1
5
5.0
5
4.0
3
2.9
0
2.79
0.9
3
2.46
4.9
0
3.3
8
4.1
2
2.9
2
4.3
4
Fou
rth
Mom
ent
30.8
0
42.9
8
14.6
3
28.3
8
40.6
1
25.4
6
36.2
0
39
.05
37.6
1
32.9
0
32.2
9
36.3
7
29.8
6
28.5
4
21.7
1
19.7
7
19
.40
10.4
3
13
.60
38.0
1
33.8
2
39.9
1
19.7
1
39.6
9
^Med
ian
2.4
5
2.4
5
-1.0
0
0.1
3
2.41
2.51
2.5
3
L 2
.54
2.5
9
2.5
3
2.5
5
2.6
7
2.5
6
2.81
2.8
3
2.8
9
2.7
2
3.0
0
3.11
2.3
0
2.4
6
2.2
0
-0.0
4
2.4
4
Mea
n 2.4
3
2.5
2
-0.4
4
0.2
2
2.3
7
2.6
0
2.4
7
2.51
2.61
2.4
6
2.4
3
2.5
5
2.5
9
2.8
9
2.9
5
2.8
6
2.5
2
2.7
5
3.31
2.2
8
2.3
4
2.2
8
-0.0
7
2.3
0
Sor
ting
0.3
8
0.31
0.7
3
0.7
2
0.4
7
0.4
3
0.3
6
0.4
0
0.4
2
0.4
3
0.4
7
0.4
8
0.4
4
0.31
0.31
0.6
4
0.9
0
1.15
0.94
0.4
5
0.4
7
0.4
6
0.9
5
0.3
6
Ske
wne
ss
-0.1
9
0.0
2
1.00
0.4
2
-0.1
8
0.2
6
-0.0
9
-0.1
0
0.0
5
-0.1
9
-0.3
4
-0.5
3
-0.0
1
0.31
0.3
6
-0.1
4
-0.1
5
-0.3
3
0.4
7
-0.1
7
-0.2
6
0.1
4
0.1
8
-0.4
2
Kur
tosi
s
1.02
1.82
0.61
1.75
0.9
9
2.3
3
2.8
4
3.0
0
0.9
9
2.5
3
2.3
4
4.1
2
2.51
2.9
0
4.7
4
1.71
1.02
1.85
2.4
0
0.7
7
1.0
7
0.8
3
0.7
9
1.08
-
00
Sam
ple
ID
M25
M26
M27
M28
M29
M30
M31
M32
M33
M34
M36
M37
M38
M39
M40
M41
M42
M43
M44
M45
M46
M47
M48
M49
Latit
ude
37
.76
89
7
37
.77
52
3
37
.78
18
8
37
.78
78
5
37
.79
45
2
37
.80
07
8
37
.80
78
3
37
.81
42
3
37
.82
10
4
37
.82
72
9
37
.84
03
2
37
.84
70
9
37
.85
32
6
37.8
6035
37
.74
54
0
37
.75
24
5
37
.75
87
1
37.7
6471
37
.77
12
6
37
.77
84
0
37
.78
48
7
37
.79
16
1
37.7
9785
37
.80
42
7
Long
itude
-123.0
1968
-123.0
2645
-12
3.0
32
77
-123.0
4100
-12
3.0
46
26
-12
3.0
52
65
-12
3.0
59
65
-12
3.0
66
43
-123.0
7362
-12
3.0
80
14
-12
3.0
93
81
-12
3.1
00
13
-123.1
0671
-123.1
1401
-122.9
7028
-122.9
7640
-12
2.9
83
01
-122.9
8957
-12
2.9
96
25
-12
3.0
03
41
-123.0
0970
-12
3.0
16
35
-12
3.0
22
63
-12
3.0
28
95
Dep
th
(mete
rs) 69
69
69
69
71 73
75
77
78
80
88
88
88
89
59
62
64
66
68
68
71 73
73
73
Perc
ent
Gra
vel 0.0
0
0.0
0
40.8
7
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.8
4
2.2
7
0.5
6
0.0
0
0.0
0
0.0
0
64.7
9
48.6
5
23.5
5
0.0
0
0.0
0
0.0
0
0.0
0
0.2
0
Perc
ent
San
d
98
.83
99
.05
58
.83
99
.11
98
.71
99
.72
98
.71
98
.65
98
.35
96
.58
96.4
7
92.1
2
78
.78
87
.83
98.3
8
99
.33
34
.14
50
.09
76
.18
98.5
0
98
.88
98
.99
98
.71
98
.71
Per
cent
Silt 0
.47
0.3
8
0.1
2
0.3
5
0.5
2
0.1
1
0.5
2
0.5
4
0.6
6
1.3
7
1.0
8
4.6
4
16
.79
10
.53
0.6
5
0.2
7
0.4
3
0.5
0
0.1
1
0.6
0
0.4
5
0.4
1
0.5
2
0.4
4
Perc
ent
Cla
y 0.7
0
0.5
7
0.1
8
0.5
3
0.7
7
0.1
7
0.7
7
0.81
0.9
9
2.0
5
1.61
0.9
7
3.8
7
1.6
4
0.9
7
0.4
0
0.6
4
0.7
5
0.1
6
0.9
0
0.6
7
0.61
0.7
8
0.6
5
Per
cent
Mud
1.1
7
0.9
5
0.3
1
0.8
9
1.2
9
0.2
8
1.2
9
1.3
5
1.6
5
3.4
2
2.6
9
5.6
1
20.6
6
12
.17
1.6
2
0.6
7
1.0
7
1.2
5
0.2
7
1.50
J
1.1
2
1.01
1.2
9
1.0
9
San
d/M
ud
Rat
io
84.6
5
103.9
5
192.2
0
111.8
8
76
.61
354.6
1
76.5
6
73
.23
59.7
4
28.2
6
35.8
7
16
.44
3.8
1
7.2
1
60.7
4
14
8.2
4
31.9
9
39
.93
285.7
9
65.5
9
88.5
2
97.7
2
76.3
5
90
.51
Sta
ndar
d
Dev
iatio
n
0.96
0.84
1.0
4
0.8
3
0.9
0
0.7
5
0.8
5
0.8
9
0.9
1
1.2
4
1.3
6
1.4
4
1.9
3
1.2
5
0.9
3
0.7
5
1.3
6
1.3
5
0.9
4
0.9
5
0.8
9
0.8
8
0.9
1
0.8
6
-
CO ro
Sam
ple
ID
M25
M26
M27
M28
M29
M30
M31
M32
M33
M34
M36
M37
M38
M39
M40
M41
M42
M43
M44
M45
M46
M47
M48
M49
Firs
t
Mom
ent
2.12
2.16
-0.0
1
2.4
8
2.5
0
2.31
2.6
7
2.7
2
2.7
4
2.9
4
1.8
7
2.3
6
3.5
7
3.3
4
2.6
4
2.1
9
-0.4
3
-0.2
4
0.1
3
2.5
8
2.5
3
2.4
7
2.51
2.5
2
Sec
ond
Mom
ent
0.9
3
0.71
1.0
8
0.6
9
0.81
0.5
6
0.7
3
0.7
9
0.8
3
1.5
3
1.8
4
2.0
7
3.7
3
1.5
6
0.8
6
0.5
6
1.8
4
1.8
3
0.8
9
0.9
0
0.7
8
0.7
8
0.8
3
0.7
4
Third
Mo
me
nt
3.4
4
4.5
6
2.2
5
4.0
0
4.4
4
1.0
0
4.5
1
4.3
1
5.1
7
3.7
6
3.5
1
1.8
9
1.7
3i
3.4
8
5.0
1
4.8
5
4.2
9
4.2
3
2.4
8
4.4
9
4.0
7
3.7
7
4.1
8
4.0
4
Fou
rth
Mom
ent
28
.46
38.0
0
18
.03
35.0
3
35.7
8
19
.09
35
.95
34.5
7
36.9
9
20
.01
19
.02
13
.38
7.9
0
21
.04
36
.45
47.6
9
26.6
0
26
.62
21
.86
31
.99
32.7
8
31
.64
35
.06
36
.94
Med
ian
2.07
2.10
0.40
2.47
2.4
7
2.4
7
2.5
5
2.7
5
2.6
3
2.8
7
1.6
4
2.6
7
3.0
7
3.1
2
2.5
9
2.1
4
-1.0
0
-0.8
4
0.2
7
2.5
0
2.51
2.4
5
2.5
2
2.5
6
Mea
n 2.08
2.1
4
0.0
7
2.4
3
2.41
2.3
3
2.5
9
2.6
9
2.6
3
2.8
6
1.7
9
2.3
2
3.5
5
3.0
9
2.5
7
2.1
9
-0.6
9
-0.4
8
0.0
2
2.5
0
2.4
6
2.4
0
2.5
0
2.41
Sort
ing
0.51
0.5
0
0.7
5
0.4
9
0.3
9
0.5
9
0.3
9
0.4
4
0.4
2
0.3
9
0.6
6
1.0
0
1.5
7
0.6
2
0.3
7
0.4
5
0.7
4
0.8
3
0.81
0.4
5
0.5
0
0.5
0
0.3
6
0.3
2
Ske
wne
ss
-0.2
0
0.0
1
-0.4
9
-0.0
9
-0.1
5
-0.4
3
0.1
0
-0.2
7
-0.0
5
-0.0
6
0.3
1
-0.3
6
0.5
0
0.2
4
-0.0
8
0.0
9
1.0
0
0.8
3
-0.2
4
0.0
8
-0.0
8
-0.0
5
-0.0
8
-0.6
6
Ku
rto
sis
1.51
1.0
8
0.4
8
1.2
4
1.2
3
2.01
2.0
2
1.8
4
1.8
4
1.7
0
1.2
0
1.1
4
2.9
5
1.9
3
3.3
3
1.4
6
2.2
7
1.21
0.8
6
0.9
3
1.4
2
1.0
0
0.91
1.3
5
-
Sam
ple
ID
M50
M51
M52
M53
M54
M55
M56
M57
M58
M59
M60
M61
M62
M63
M64
M65
M66
M67
M68
M69
M70
M71
M72
M73
Latit
ude
37
.81
07
4
37
.81
75
2
37
.82
38
9
37
.83
04
2
37.8
3718
37.8
4338
37
.84
97
7
37
.85
64
5
37
.86
29
5
37
.75
26
9
37
.75
89
2
37.7
6564
37
.77
15
6
37.7
7832
37.7
8504
37
.79
08
9
37
.79
80
2
37
.80
46
1
37
.81
09
6
37
.81
74
1
37
.82
40
7
37
.83
07
3
37
.83
70
0
37
.84
39
7
Longitu
de
-123.0
3548
-12
3.0
42
35
-12
3.0
48
75
-123.0
5550
-123.0
6201
-123.0
6905
-12
3.0
75
36
-123.0
8190
-12
3.0
88
37
-122.9
6169
-12
2.9
68
03
-12
2.9
74
56
-122.9
8165
-12
2.9
87
69
-122.9
9464
-123.0
0172
-12
3.0
08
10
-12
3.0
14
63
-123.0
2092
-12
3.0
27
37
-123.0
3362
-12
3.0
41
10
-12
3.0
47
48
-12
3.0
53
58
Dep
th
(met
ers) 7
7
77
77
81 84
86
88
88
88
58
60
64
64
68
69
71 71 73
73
75
60
78
82
84
Pe
rce
nt
Gra
vel
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
2.6
7
1.5
8
42
.62
0.0
0
0.0
0
51
.18
0.0
0
25
.09
0.0
0
0.0
0
0.2
5
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
Per
cent
San
d
98
.82
98.2
0
97.6
8
93.9
6
95.3
8
94.3
6
87.9
2
75
.75
44.2
8
99.6
6
99
.45
48
.41
98
.72
74
.91
98.8
6
98.5
7
97.9
4
97.6
8
97.8
9
97.3
5
96
.78
96.3
6
92
.96
94.5
7
Per
cent
Silt 0
.47
0.72
0.93
4.78
1.85
5.22
8.71
20.2
3
11
.92
0.1
4
0.2
2
0.1
7
0.51
0.0
0
0.4
6
0.5
7
0.7
2
0.9
3
0.8
4
1.0
6
1.2
9
1.4
6
6.6
2
4.9
3
Per
cent
Cla
y 0.71
1.08
1.39
1.25
2.77
0.42
0.70
2.43
1.19
0.2
0
0.3
3
0.2
5
0.7
7
0.0
0
0.6
9
0.8
6
1.0
9
1.3
9
1.2
6
1.5
9
1.9
3
2.1
8
0.4
2
0.5
0
Per
cent
Mud
1.18
1.80
2.32
6.04
4.6
2
5.6
4
9.41
22.6
7
13
.10
0.3
4
0.5
5
0.4
2
1.2
8
0.0
0
1.1
4
1.4
3
1.81
2.3
2
2.1
1
2.6
5
3.2
2
3.6
4
7.0
4
5.4
3
San
d/M
ud
Rat
io
83.9
6
54.5
1
42.1
1
15.5
7
20
.63
16.7
4
9.34
3.34
3.3
8
292.
91
180.
05
116.
55
76
.97
0.00
86
.43
68
.80
54
.08
42
.04
46
.46
36.6
9
30.0
2
26
.47
13.2
0
17.4
3
Sta
ndar
d
Dev
iatio
n
0.84
0.96
0.99
1.07
1.33
1.12
1.38
2.08
2.50
0.71
0.79
1.02
1.00
0.88
0.8
7
0.85
1.01
1.10
1.05
1.10
1.17
1.21
0.93
0.88
-
CO
Sam
ple
ID
M50
M51
M52
M53
M54
M55
M56
M57
M58
M59
M60
M61
M62
M63
M64
M65
M66
M67
M68
M69
M70
M71
M72
M73
First
Mom
ent
2.59
2.7
6
2.9
2
3.0
8
3.3
1
2.6
4
2.4
6
3.1
2
1.31
2.3
4
2.21
-0.2
8
2.4
2
-0.0
3
2.5
8
2.6
8
2.5
9
2.7
2
2.7
9
2.9
8
3.1
1
3.21
2.9
9
3.0
4
Sec
ond
Mom
ent
0.7
1
0.9
2
0.9
8
1.1
4
1.7
6
1.2
6
1.9
2
4.3
2
6.2
3
0.5
0
0.6
3
1.0
4
1.01
0.7
7
0.7
5
0.7
2
1.0
3
1.2
2
1.11
1.21
1.3
6
1.4
7
0.8
7
0.7
7
Third
Mom
ent
4.3
5
4.7
2
5.2
9
5.4
2
3.51
1.3
0
1.2
2
0.8
2
0.9
0
1.4
6
2.5
5
3.4
7
2.6
7
1.1
9
4.1
4
5.7
8
3.7
9
4.0
9
4.0
0
4.1
0
3.9
8
3.7
8
2.5
0
3.2
0
Fou
rth
Mom
ent
35
.91
32
.91
33
.15
38
.46
15
.85
12
.77
9.2
4
4.9
9
3.5
4
28
.03
29
.20
26
.91
23
.06
5.1
2
35
.84
44.3
4
27
.36
24
.99
26
.17
24
.35
21
.51
19.3
5
20
.72
25
.50
Med
ian
2.6
2
2.6
9
2.7
9
2.8
6
3.0
1
2.6
8
2.6
6
2.9
8
0.9
3
2.4
7
2.2
6
-1.0
0
2.4
5
-0.1
4
2.6
0
2.6
3
2.5
8
2.5
5
2.6
8
2.9
7
2.9
1
3.0
4
2.7
7
2.9
7
Mea
n 2.54
2.6
6
2.8
5
3.01
3.0
5
2.7
5
2.3
9
3.0
2
1.0
7
2.4
2
2.2
6
-0.5
1
2.4
2
-0.1
3
2.5
6
2.5
6
2.5
2
2.6
4
2.7
5
2.8
8
2.9
8
3.1
0
2.8
8
2.9
6
Sort
ing
0.3
9
0.4
4
0.3
2
0.4
7
0.3
9
0.7
8
1.01
2.0
6
2.1
0
0.4
3
0.5
2
0.6
6
0.5
3
0.8
0
0.41
0.3
7
0.3
3
0.4
5
0.4
5
0.3
6
0.3
3
0.3
4
0.5
2
0.5
5
Ske
wne
ss
-0.3
2
-0.1
7
0.2
0
0.7
4
0.1
6
0.0
4
-0.2
2
0.0
7
0.2
7
-0.3
0
-0.1
3
1.0
0
-0.1
8
0.1
5
-0.1
7
-0.0
9
-0.2
7
0.21
0.1
2
-0.1
8
0.3
9
0.3
0
0.5
7
0.0
7
Kurt
osi
s
4.3
2
1.9
2
2.81
1.8
5
0.91
2.3
9
1.11
2.2
4
0.71
0.9
9
1.0
8
0.6
0
3.0
0
0.6
9
2.5
5
1.3
4
1.0
5
1.8
2
1.2
4
1.4
0
1.8
8
1.5
8
1.3
2
1.51
-
en
Sam
ple
ID
M74
M75
M76
M77
M78
M79
M80
M81
M82
M83
M84
M85
M86
M87
M88
M89
M90
M91
M92
M93
M94
M95
M96
M97
Latit
ude
37.8
4990
37
.85
66
4
37
.86
33
6
37.8
7444
37
.86
76
9
37
.86
12
7
37
.85
50
1
37.8
4851
_ 37
.84
27
0
37
.83
55
2
37
.82
92
8
37
.82
29
7
37
.81
68
4
37
.81
02
8
37
.80
38
1
37.7
9713
37
.79
06
2
37
.78
41
9
37
.77
77
6
37
.77
15
0
37
.76
46
8
37
.75
82
2
37.7
3001
37
.73
63
7
Long
itude
-123.0
5996
-12
3.0
66
89
-12
3.0
73
55
-123.0
7310
-12
3.0
65
66
-12
3.0
59
54
-123.0
5265
-123.0
4539
-123.0
3903
-123.0
3249
-12
3.0
26
36
-123.0
1988
-123.0
1341
-12
3.0
06
96
-123.0
0038
-122.9
9324
-122.9
8660
-122.9
7991
-12
2.9
73
36
-12
2.9
66
25
-122.9
6018
-12
2.9
53
44
-122.9
9454
-123.0
0163
Dep
th
(met
ers) 8
6
88
88
88
88
88
86
86
81 79
77
77
77
73
73
73
71 70
68
66
64
62
55
59
Perc
ent
Gra
vel 0.0
0
0.0
0
0.0
0
5.61
7.7
0
0.3
5
2.0
6
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
0.0
0
8.1
9
0.0
0
0.0
0
20.1
2
0.0
0
0.0
0
0.0
0
0.0
0
Per
cent
San
d
85.6
7
88.2
0
86.1
5
63
.25
62
.85
81
.44
78.3
9
91
.31
94
.23
95
.88
96.3
5
97.0
2
97.9
5
98.0
8
98.1
9
98
.01
91.3
7
98.5
7
99.1
6
79.8
8
98.4
7
99.8
4
99.8
6
99.5
2
Per
cent
Silt 12
.20
10.4
0
12.6
1
28
.17
26
.55
16.3
1
17.6
0
7.6
2
4.8
8
1.6
5
1.4
6
1.1
9
0.8
2
0.7
7
0.7
2
0.8
0
0.1
8
0.8
3
0.3
4
0.0
0
0.8
7
0.0
6
0.0
6
0.1
9
Per
cent
Cla
y 2.13
1.40
1.2
4
2.9
7
2.9
1
1.91
1.9
6
1.0
7
0.8
9
2.4
7
2.1
9
1.7
9
1.2
3
1.1
5
1.0
9
1.2
0
0.2
6
0.6
0
0.51
0.0
0
0.6
6
0.1
0
0.0
8
0.2
9
Per
cent
Mud 1
4.33
11.8
0
13
.85
31.1
4
29.4
6
18
.22
19
.55
8.6
9
5.7
7
4.1
2
3.6
5
2.9
8
2.0
5
1.9
2
1.81
1.9
9
0.4
4
1.4
3
0.8
4
0.0
0
1.5
3
0.1
6
0.1
4
0.4
8
San
d/M
ud
Rat
io 5.9
8
7.4
7
6.2
2
2.0
3
2.1
3
4.4
7
4.0
1
10
.51
16.3
3
23
.27
26
.42
32
.57
47.8
3
51.0
1
54.2
4
49.1
3
206.8
9
69
.01
11
7.3
8
0.0
0
64
.48
62
6.8
9
72
2.7
1
20
8.6
0
Sta
ndar
d
Dev
iatio
n
1.49
1.53
1.3
4
2.2
1
2.1
5
1.4
9
1.5
8
1.0
8
0.9
7
1.2
5
1.21
1.3
0
0.9
9
1.01
0.9
9
0.9
8
0.8
7
0.8
7
0.7
8
0.8
6
0.8
6
0.5
7
0.6
7
0.7
7
-
CO cr>
Sam
ple
ID
M74
M75
M76
M77
M78
M79
M80
M81
M82
M83
M84
M85
M86
M87
M88
M89
M90
M91
M92
M93
M94
M95
M96
M97
Firs
t
Mom
ent
3.21
2.91
3.07
3.2
6
3.2
4
3.2
6
3.3
6
3.2
2
3.1
4
3.2
2
3.0
2
2.8
0
2.8
2
2.8
4
2.8
4
2.7
7
0.0
2
2.4
3
2.2
6
0.21
2.5
3
2.4
7
2.1
7
2.3
2
Sec
ond
Mom
ent
2.22
2.3
3
1.8
0
4.9
0
4.6
2
2.2
3
2.5
0
1.1
7
0.9
5
1.5
7
1.4
7
1.7
0
0.9
8
1.0
2
0.9
8
0.9
6
0.7
6
0.7
6
0.61
0.7
3
0.7
4
0.3
3
0.4
4
0.5
9
Third
Mom
ent
2.8
2
1.9
8
2.0
3
0.6
2
0.6
9
2.21
1.6
3
3.8
7
4.3
6
3.9
5
4.2
7
2.6
2
4.7
8
4.0
2
3.9
8
4.9
0
5.39
^
4.3
6
4.9
4
0.4
9
4.5
1
0.41
0.2
9
1.8
9
Fou
rth
Mom
ent
13
.76
10.6
2
14.1
8
4.91
5.4
5
11.9
8
10.6
2
26
.54
33
.23
18
.92
21
.76
16.6
1
31
.83
27
.40
28
.27
32
.98
49.6
7
36
.44
43
.68
3.9
2
39.9
2
32
.43
19.7
9
28
.41
Med
ian
2.89
2.90
2.8
6
2.9
5
2.9
0
2.9
8
3.0
2
3.0
0
2.9
8
3.0
2
2.8
0
2.7
6
2.6
8~
2^f
2.7
6
2.5
6
-0.1
0
2.4
6
2.2
3
0.2
9
2.5
3
2.5
7
2.2
4
2.4
6
Mea
n 2.9
9
2.6
8
3.1
2
3.1
3
3.1
6
3.2
5
3.3
6
3.0
5
3.0
6
3.01
2.9
0
2.7
9
2.7
2
2.7
9
2.7
3
2.6
0
-0.0
3
2.3
8
2.2
7
0.0
8
2.4
2
2.6
0
2.2
2
2.4
0
Sor
ting
0.98
1.22
0.8
0
2.1
6
2.0
3
1.0
9
1.1
4
0.5
4
0.4
7
0.3
6
0.2
8
0.5
6
0.3
2
0.4
7
0.4
3
0.3
7
0.3
9
0.4
9
0.4
3
0.8
4
0.3
2
0.3
3
0.4
8
0.5
0
Ske
wne
ss
0.39
-0.0
4
0.59
0.09
0.1
4
0.41
0.4
6
0.3
8
0.3
2
0.0
2
0.4
7
-0.2
1
0.0
7
-0.0
7
0.0
4
0.2
1
0.3
4
-0.1
7
-0.0
4
-0.2
2
-0.5
0
-0.1
9
-0.2
6
-0.3
6
Kurt
osi
s
2.4
6
1.1
4
3.6
0
1.6
6
1.8
0
2.1
3
2.2
2
1.61
2.8
3
0.8
0
14
.05
3.8
5
1.3
6
1.4
T
1.3
5
1.4
2
1.3
5
1.1
9
0.8
0
1.01
1.4
7
0.9
3
0.9
0
1.11
-
Sam
ple
ID
M98
M99
M10
0
M10
1
M10
2
M10
3
M10
4
M10
5
M10
6
M10
7
M10
8
M10
9
M11
0
M11
1
M11
2
M11
3
M11
4
M11
5
M11
6
M11
7
M11
8
M11
9
M12
0
M12
1
Latit
ude
37.7
4298
37.7
4916
37.7
5539
37
.76
17
8
37
.76
80
1
37.7
7439
37
.77
83
3
37.7
8743
37
.79
37
4
37
.80
00
9
37.8
0674
37
.81
30
9
37
.81
94
2
37
.82
22
7
37.8
3187
37
.83
86
9
37
.84
46
0
37.8
4365
37.8
3691
37.8
3057
37.8
2409
37.8
1774
37.8
1123
37
.80
47
0
Long
itude
-123.0
0840
-123.0
1518
-12
3.0
21
97
-123.0
2854
-123.0
3545
-12
3.0
42
27
-12
3.0
52
49
-123.0
5600
-12
3.0
62
81
-12
3.0
69
27
-123.0
7553
-123.0
8259
-123.0
8922
-12
3.1
03
57
-123.1
0341
-123.1
1003
-12
3.1
16
71
-12
3.1
24
42
-12
3.1
17
49
-12
3.1
11
21
-12
3.1
04
44
-123.0
9783
-123.0
9129
-123.0
842
4
Dep
th
(met
ers) 6
2
66
68
68
69
69
69
71 73
73
75
77
78
80
84
86
88 87
84
82
80
78
77
77
Per
