Table T2. Summary of Neogene nannofossils, Hole 1225A.
Core,
section
Depth
(mbsf)
Epoch
Age
(Ma)
Zone
Amaurolithus spp.
Calcidiscus leptoporus
Calcidiscus macintyrei
Catinaster coalitus
Ceratolithus spp.
Coccolithus pelagicus
Coccolithus miopelagicus
Cyclithella annulus
Discoaster asymmetricus
Discoaster bellus
Discoaster brouweri
Discoaster calcaris
Discoaster challengeri
Discoaster exilis
Discoaster hamatus
Discoaster kugleri
Discoaster loeblichii
Discoaster pentaradiatus
Discoaster quadramus
Discoaster quinqueramus
Discoaster surculus
Discoaster tamalis
Discoaster triradiatus
Discoaster variabilis
Discoaster spp.
Discolithina japonica
Discolithina multipora
Discolithina spp.
Emiliania huxleyi
Gephyrocapsa carribeanica
Gephyrocapsa oceanica
Gephyrocapsa parallela
Gephyrocapsa spp. (small)
Helicosphaera carteri
Helicosphaera granulata
Helicosphaera hyalina
Helicosphaera intermedia
Helicosphaera sellii
Helicosphaera wallichii
Pseudoemiliania lacunosa
Reticulofenestra asanoi
Reticulofenestra pseudoumbilicus
Reticulofenestra spp. (small)
Rhabdosphaera clavigera
Sphenolithus abies
Sphenolithus moriformis
Syracosphaera pulchra
Umbilicosphaera sibogae
201-1225A- Pleistocene

















































1H-CC 3.94 ~0.25 NN21
C

























C C C C A C
R





C R

R R
2H-CC 14.10 0.85~1.16 NN19
C +
+ +

























A





C R + A




3H-CC 23.39 1.16~1.65
C






















+



R
A A
R


C

C


R R
4H-CC 32.85 Pliocene late 2.00~2.40 NN18
R R
+ C



R












R +
R



R C


C + R

A


+ +
5H-CC 42.59 2.56~2.75 NN16
C R
R C



R





R

R


R R






C


R + R

A



+
6H-CC 52.14 2.75~3.66
C +
R C
R +
R





R

R R
R R C
C



+ C




R

A


R
7H-CC 61.31
C R
R R
+ +
C









+ + R C

C




R


R
+

A


+
8H-CC 71.06 early 3.66~4.50 NN15
R R
+

R

R










+ R R

R




C






A A
C
+
9H-CC 80.39
R

R +

R
C





+

R

C A +
R




C



+

C A
C
R
10H-CC 90.09 4.50~4.70 NN13~14 + C +
+ R
R

C





+

C +
C A
+ R




C






C A
A


11H-CC 99.54 R C

+ C
R

C





R

C
+ C A +
R




R



+

C A
C
+
12H-CC 108.97 4.70~5.60 NN12 + C +



+

R





+

R

R A
R R




R



R

C A
C


13H-CC 118.56 R C







R





+

R

R A
R R




C



+

C A
A


14H-CC 128.09 Miocene late 5.60~8.70 NN11B R C


R



R





R
R R

R A







C



R

C A
A


15H-CC 137.48 NN10B~11A
C


C
+

R

+


C
R R

R A
R R












R A
A
+
16H-CC 147.20
C


C
R

R

+


+ + R R


C







+






C A
C


17H-CC 156.16
C R

C



R





+
+ R

C C

R




C



+

R A
A


18H-CC 165.80
C R

C



C




+ R

R

C A







R



R


A
C


19H-CC 175.47
C


C



R




R
+ + R

R A







C







A
C


20H-CC 184.94
C R

C



R R R


R R

+

R C

+




R







A
A R

21H-CC 194.39
C


C



R R R


R R
R


R C







C

+




A
A R

22H-CC 203.96
R R

C
R

R + R


+ C
R



A







C

+
+


C
A C

23H-CC 215.13 8.70~9.40 NN10A
+


R
R

R
C










C















C A
C C

24H-CC 224.62
R +

R
R

R

+









R

+




C

+



C A
C C

25H-CC 234.03 9.40~10.70 NN9
R +

C
+
+
+ R + R








C

+












C A
C R

26H-CC 243.53
C
R
C
R
R R R R
+








C















C C
C


27H-CC 252.98 middle 10.70~13.20 NN7~8
R +

C



+
R









+ C







R

R



C R
C R

30H-CC 272.81
+


C R




+









R C

+




R






A C
R R

31H-CC 283.43
R


C R


+
R









R C







R






C A

R

32H-CC 292.88
R


C R




R R









C







R +
+



C A




33H-CC 302.40
R


R R




+ +
R






+ C

R




R +
+



C A
R R

34H-CC 313.48
C +

C C







+







A

R




C R
+



A A
R R

Notes: Biostratigraphic zonation from Martini (1971), bioevents datum from Sato et. al. (1999), and diatom biostratigraphic zonation from Barron (1985a, 1985b) and Baldauf and Iwai (1995). Relative frequencies (Takayama and Sato, 1987): A = abundant (>32% of the species in total assemblage), C = common (32%–8%), R = rare (<8%), + = present (found but not counted).