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Table T8. Distribution of diatoms in Unit I, Hole C0020A.
|
Cuttings sample
|
Depth DRF (m)
|
Top depth MSF (m)
|
Bottom depth MSF (m)
|
Geologic
age
|
Zone/
Subzone
|
Abundance
|
Preservation
|
Actinocyclus oculatus
|
Crucidenticula spp.
|
Denticulopsis spp.
|
Kisselviella spp.
|
Melosira spp.
|
Neodenticula kamtschatica
|
Neodenticula koizumii
|
Neodenticula seminae
|
Nitzchia pliocena
|
Proboscia curvirostris
|
Thalassiosira oestrupii
|
|
337-C0020A-
|
|
25-SMW
|
1865
|
646.5
|
656.5
|
Barren
|
—
|
B
|
—
|
|
|
|
|
|
|
|
|
|
|
|
|
35-SMW
|
1965
|
746.5
|
756.5
|
late Pliocene
|
upper NPD9
|
C
|
M
|
R
|
|
|
|
|
|
R
|
F
|
|
|
|
|
40-SMW
|
2015
|
796.5
|
806.5
|
late Pliocene
|
upper NPD9
|
R
|
P
|
|
|
|
|
|
|
R
|
R
|
|
|
|
|
45-SMW
|
2065
|
846.5
|
856.5
|
late Pliocene
|
upper NPD9
|
C
|
M
|
R
|
|
|
|
|
|
R
|
F
|
|
|
|
|
53-SMW
|
2085
|
866.5
|
876.5
|
Barren
|
—
|
B
|
—
|
|
|
|
|
|
|
|
|
|
|
|
|
54-SMW
|
2095
|
876.5
|
886.5
|
Barren
|
—
|
B
|
—
|
|
|
|
|
|
|
|
|
|
|
|
|
55-SMW
|
2105
|
886.5
|
896.5
|
late Pliocene
|
NPD9
|
F
|
P
|
|
|
|
|
|
|
F
|
|
|
|
|
|
56-SMW
|
2115
|
896.5
|
906.5
|
early Pliocene
|
NPD8
|
F
|
G
|
R
|
|
|
|
|
R
|
R
|
X
|
|
|
|
|
61-SMW
|
2165
|
946.5
|
956.5
|
early Pliocene
|
NPD8
|
C
|
M
|
|
|
|
|
|
F
|
F
|
X
|
|
|
|
|
66-SMW
|
2215
|
996.5
|
1006.5
|
early Pliocene
|
NPD7Bb
|
A
|
G
|
|
|
|
|
|
C
|
|
|
|
|
R
|
|
74-SMW
|
2275
|
1056.5
|
1066.5
|
early Pliocene
|
NPD7Bb
|
F
|
M
|
|
|
|
|
|
F
|
|
|
|
|
R
|
|
75-SMW
|
2285
|
1066.5
|
1076.5
|
early Pliocene
|
NPD7Bb
|
F
|
G
|
R
|
|
|
|
|
F
|
|
|
|
|
R
|
|
92-SMW
|
|
1116.5
|
1126.5
|
Lost
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
89-SMW
|
2335
|
1126.5
|
1136.5
|
Miocene
|
—
|
C
|
M
|
|
|
|
R
|
C
|
X
|
|
X
|
|
|
|
|
90-SMW
|
2345
|
1136.5
|
1146.5
|
Miocene
|
—
|
C
|
M
|
|
|
|
R
|
C
|
|
|
|
|
|
|
|
94-SMW
|
2435
|
1216.5
|
1226.5
|
Barren
|
—
|
B
|
—
|
|
|
|
|
|
|
|
|
|
|
|
|
95-SMW
|
2445
|
1226.5
|
1236.5
|
Miocene
|
—
|
R
|
M
|
|
|
|
R
|
|
X
|
|
X
|
|
|
|
|
97-SMW
|
2455
|
1236.5
|
1246.5
|
Miocene
|
—
|
R
|
P
|
|
|
|
|
|
|
|
|
|
X
|
|
|
98-SMW
|
2465
|
1246.5
|
1256.5
|
Miocene
|
—
|
R
|
P
|
|
?
|
R
|
|
|
|
X
|
|
|
|
|
NPD = North Pacific diatom. Abundance: A = abundant (≥6 specimens per field of view [FOV] at 400× magnification), C = common (1–5 specimens/FOV at 400×), F = few (1–4 specimens/5 FOVs at 400×), R = rare (1–10 specimens/horizontal traverse at 400×), B = barren, X = contaminant. Preservation: P = poor, M = moderate, G = good. — = barren or indeterminate.
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