25. Early Cretaceous Foraminifera from the Northwestern Pacific ...

H. LUTERBACHER
AGE
EARLY
CENOMANIAN
LATE
ALBIAN
(to basal C nomanian)
MIDDLE
TO
EARLY
ALBIAN
9
APT IAN
•
BARREMIAN
BARREMIAN
TO
HAUTERIVIAN
EARLY
CRETACEOUS
(undiffereπtiated)
SUBDIVISION
BASED ON
FORAMINIFERA
Interval with
Robalipora brobzem.
Robalipora greenhornen sis
and Kobalipora gandoffii
Interval with
Robalipora apenπinica
Interval with
Ticinella primula
*
Interval with
Globigerinel/oides ferreolensis
Interval between
highest occurrence of
Dorobhia zedlerae
and highest occurrence of
Dorobhia hauberiviana
Interval with
Dorobhia hauberiviana
li
1
1
1T
...A.
-4-
38
39
40
41
42
44
45
46
47
41
49
50
S1
52
53
54
55
57
58
59
60
61
62
63
64
65
66
67
**305
32 β OO,13'N
157*51,OO'E
Water depth.
2903 m
.1 1
Λ
Q
II
||
II
I 1
1
|
I
SHATSKY RISE
2
3
4
5
6
7
β
9
I0
II
12
13
14
15
16
17
18
19
23
24
25
26
27
28
29
30
= 31 =
32
33
34
35
36
37
38
39
40
41
42
4*306
31 β 52,02'N
157 β 28,7rE
Water depth:
3399 m
50
40
-30
20*
| 11*^1
π — 13
~•
A
-Om
-50 m
1000 kin
140*
-100 m
#304
39'20,27'N
155*04,19'E
Water depth:
5630 m
0
150
Φ
#303
•304
306* *
.307 "
160
Interval with poor and/or
uncharacteristic
microfaunas
\
JAPANESE
Interval with
characteristic
microfaunas
7A
8A
#303
40 48.50'N
l54 β
27,O7'E
Water depth:
5609m
MAGNETIC LINEATIONS
Figure 1. Subdivision and correlation based on foraminifera of the Lower Cretaceous in Sites 303, 304, 305, and 306.
704