Table
3. Distribution and relative abundances of stratigraphically useful
planktonic foraminifers in Pliocene-Quaternary Hole 1012A.
Core,
section, interval (cm)
Depth (mbsf)
Neogloboquadrina
pachyderma B
Neogloboquadrina
pachyderma A
Globorotalia
inflata
Neogloboquadrina
dutertrei
Neogloboquadrina
humerosa praehumerosa
Neogloboquadrina
kagaensis
Neogloboquadrina
asanoi
Globorotalia
puncticulata
Zone
Age
167-1012A-
1H-1,
50-55
0.50
F
R
CM1
Quaternary
1H-2,
50-55
2.00
A
C
1H-3,
50-55
3.50
A
2H-1,
50-55
5.20
A
2H-2,
50-55
6.70
R
2H-3,
50-55
8.20
R
2H-4,
50-55
9.70
F
2H-5,
50-55
11.20
A
F
A
2H-6,
50-55
12.70
A
A
R
3H-1,
46-50
14.66
A
3H-2,
50-55
16.20
R
3H-3,
50-55
17.70
C
3H-4,
50-55
19.20
R
3H-5,
50-55
20.70
A
F
3H-6,
50-55
22.20
A
R
3H-7,
50-55
23.70
C
4H-1,
50-55
24.20
F
R
4H-2,
50-55
25.70
A
F
R
F
4H-3,
50-55
27.20
C
4H-4,
50-55
28.70
F
4H-5,
50-55
30.20
F
4H-6,
50-55
31.70
A
F
A
4H-7,
50-55
33.20
A
A
R
5H-1,
50-55
33.70
F
5H-2,
50-55
35.20
C
R
R
5H-3,
50-55
36.70
C
5H-4,
50-55
38.20
A
F
R
5H-5,
49-55
39.69
F
R
5H-6,
50-55
41.20
A
5H-7,
50-55
42.70
R
6H-1,
50-55
43.20
A
C
6H-2,
50-55
44.74
A
R
6H-3,
50-55
46.27
A
C
6H-4,
50-55
47.77
A
6H-5,
50-55
49.32
A
6H-6,
50-55
50.87
A
F
C
6H-7,
50-55
52.40
A
A
F
CM2
7H-1,
50-55
52.70
R
7H-2,
50-55
54.20
F
7H-3,
50-55
55.70
A
F
7H-4,
50-55
57.20
A
R
R
7H-5,
50-55
58.70
A
7H-6,
50-55
60.20
A
7H-7,
50-55
61.70
A
C
A
R
8H-1,
50-55
62.20
A
F
F
8H-2,
50-55
63.70
A
C
8H-3,
50-55
65.20
F
C
8H-4,
50-55
66.70
R
8H-5,
50-55
68.20
C
C
A
C
8H-6,
50-55
69.70
C
C
R
8H-7,
50-55
71.20
A
F
R
9H-1,
55-60
71.75
A
C
A
A
9H-2,
50-55
73.20
A
C
R
9H-3,
50-55
74.70
A
C
C
C
9H-4,
55-60
76.20
A
F
F
A
9H-5,
55-60
77.70
A
R
A
A
A
9H-6,
50-55
79.20
C
C
9H-7,
50-55
80.70
C
F
10H-1,
50-55
81.20
A
R
C
10H-2,
50-52
82.70
A
C
10H-3,
50-55
84.20
C
R
F
10H-4,
50-55
85.70
A
C
C
C
10H-5,
50-55
87.20
F
10H-6,
50-55
88.70
A
CM3
to CM4
11H-1,
50-55
90.70
11H-2,
50-55
92.20
F
11H-3,
50-55
93.70
11H-4,
50-55
95.20
F
11H-5,
50-55
96.70
R
11H-6,
50-55
98.20
A
R
11H-7,
50-55
99.70
R
R
12H-1,
50-55
100.20
late
Pliocene
12H-2,
58-63
101.95
F
12H-3,
50-55
103.37
R
CM3
to CM4
12H-4,
50-55
104.87
F
12H-5,
50-55
106.37
12H-6,
50-55
107.87
12H-7,
50-55
109.37
C
R
13H-1,
50-55
109.70
13H-2,
50-55
111.20
A
A
A
13H-3,
50-55
112.70
R
R
13H-4,
50-55
114.20
13H-5,
50-55
115.70
13H-6,
50-55
117.20
F
13H-7,
50-55
118.70
C
C
C
14H-1,
50-54
119.20
C
CM5
14H-2,
50-54
120.70
R
R
F
14H-3,
50-54
122.20
A
F
F
14H-4,
50-54
123.70
14H-5,
50-54
125.20
F
14H-6,
50-54
126.70
F
C
A
15X-1,
50-54
128.90
F
C
15X-2,
50-54
130.40
R
R
15X-3,
50-54
131.90
F
F
C
15X-4,
50-54
133.40
R
A
15X-5,
50-54
134.90
F
C
C
CM6
15X-6,
50-54
136.40
R
R
F
F
16X-1,
50-55
138.50
R
F
A
16X-2,
50-55
140.00
R
16X-4,
50-55
143.00
R
16X-5,
50-55
144.50
F
16X-6,
50-55
146.00
R
R
17X-1,
50-55
148.10
R
17X-2,
50-55
149.60
R
R
17X-3,
50-55
151.10
R
C
C
17X-4,
50-55
152.60
C
C
17X-5,
50-55
154.10
R
R
C
C
17X-6,
50-55
155.60
F
18X-1,
50-55
157.70
18X-2,
50-55
159.20
R
18X-3,
50-55
160.70
18X-4,
50-55
162.20
R
R
C
C
18X-5,
50-55
163.70
F
C
C
18X-6,
50-55
165.20
R
19X-1,
50-55
167.30
R
F
C
A
F
19X-2,
50-55
168.80
F
C
A
20X-1,
50-55
170.40
R
R
A
A
C
20X-2,
50-55
171.90
C
C
20X-3,
50-55
173.40
F
A
A
R
20X-4,
50-55
174.90
R
C
A
20X-5,
50-55
176.40
R
R
A
A
R
20X-6,
50-55
177.90
F
21X-1,
50-55
179.00
R
F
F
21X-2,
50-55
180.50
C
F
21X-3,
50-55
182.00
R
A
A
21X-4,
50-55
183.50
R
C
F
21X-5,
50-55
185.00
F
C
C
R
22X-1,
50-55
188.50
F
C
22X-2,
50-55
190.00
F
A
F
22X-3,
50-55
191.50
R
F
C
22X-4,
50-55
193.00
R
C
R
22X-5,
50-55
194.50
C
A
C
23X-1,
50-55
198.10
R
C
A
C
R
23X-2,
50-55
199.60
R
23X-3,
50-55
201.10
F
23X-4,
50-55
202.45
R
C
23X-5,
50-55
203.95
R
F
23X-6,
50-55
205.45
C
C
24X-1,
50-55
207.80
R
F
F
24X-2,
50-55
209.30
R
F
R
24X-3,
50-55
210.80
24X-4,
50-55
212.30
C
24X-5,
50-55
213.80
A
F
24X-6,
50-55
215.30
C
C
C
A
25X-1,
50-55
217.20
C
C
C
25X-2,
50-55
218.70
F
25X-3,
50-55
220.20
R
F
25X-4,
50-55
221.70
F
R
R
25X-5,
50-55
223.20
F
R
C
F
R
CM6
late
Pliocene
25X-6,
50-55
224.61
R
R
F
R
26X-1,
50-55
226.90
A
F
C
26X-2,
50-55
228.40
F
26X-3,
50-55
229.90
26X-4,
41-46
231.31
R
R
F
26X-5,
50-55
232.90
R
F
27X-1,
50-55
236.50
F
R
R
27X-2,
50-55
238.00
R
27X-3,
50-55
239.50
F
F
27X-4,
50-55
241.00
R
F
R
27X-5,
50-55
242.50
R
R
28X-1,
50-55
245.10
R
F
28X-2,
50-55
246.60
F
F
28X-3,
50-55
248.10
R
28X-4,
50-55
249.60
R
C
R
28X-5,
50-55
251.10
F
R
28X-6,
50-55
252.60
F
C
R
29X-2,
50-55
255.93
C
A
A
29X-3,
50-55
257.43
C
C
C
29X-4,
50-55
258.93
R
R
29X-5,
67-72
260.60
F
F
F
29X-6,
50-55
261.93
R
F
F
30X-2,
50-55
264.68
R
30X-3,
50-55
266.18
C
C
A
30X-4,
50-55
267.68
R
R
CM7
e.
Plio.
30X-5,
50-55
269.18
R
R
30X-6,
50-55
270.68
l.
Mio.
30X-7,
49-54
272.17
Notes: California margin (CM) zones indicated. A = abundant, C = common, F = few, R = rare.