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Table T8. Distribution of calcareous nannofossils, Hole U1312B. (Continued on next page.)

Core, section
Martini (1971)
Zone (base)
Age
(Ma)
 Abundance Preservation Amaurolithus delicatus Amaurolithus ninae Amaurolithus primus Amaurolithus tricorniculatus Calcidiscus leptoporus Calcidiscus macintyrei Calcidiscus tropicus Catinaster calyculus Ceratolithus cristatus Ceratolithus spp. Coccolithus braarudii Coccolithus miopelagicus Coccolithus pelagicus Cryptococcolithus mediaperforatus Discoaster asymmetricus Discoaster bellus Discoaster berggrenii Discoaster brouweri Discoaster cf. exilis Discoaster hamatus Discoaster loeblichii Discoaster neohamatus Discoaster pentaradiatus Discoaster quinqueramus Discoaster surculus Discoaster tamalis Discoaster triradiatus Discoaster variabilis Discoaster variabilis (3, 5, or 7 ray) Emiliania huxleyi Gephyrocapsa aperta Gephyrocapsa caribbeanica Gephyrocapsa oceanica Gephyrocapsa parallela Large Gephyrocapsa spp. Helicosphaera carteri Helicosphaera granulata Helicosphaera inversa Helicosphaera sellii Minylitha convallis
306-1312B-
1H-CC NN21
V G



A




C
F















A A F F F
C
?

2H-CC NN19
A G



C




F
C
















A F
F
C



3H-CC
V G–M



C






C





















C



4H-CC NN17
V G–M



C F





C



R



R



R


R R

F

R
5H-CC NN16
V G–M



C F





C



R



F
F R
R






F

R
6H-CC
V G–M



F F





C



R



F



R






F

R
7H-CC
V G–M



C F





C



R



R
R R
R






R

R
8H-CC
V G–M



C C





C



F



F
R R
C






C

F
9H-CC
V G–M



C C





A
R

F



F



F






F

R
10H-CC
V G–M



C C





C
R

R



F
R R
F






F

R
11H-CC
V G–M



C R





C
R

F



F

F
F






F

F
12H-CC
V G–M



C F





F
F

F



F

F
F






C

R
13H-CC NN15
V G–M



A F


p

C



F



C



F






C



14H-CC
V G–M



C F

R


C



F



C



R






C



15H-CC NN12/NN13/NN14
V G–M

F
C R





C



F



R



F






F



16H-CC
V G–M

F F C F

R


C



R



F



F






F



17H-CC
V G–M R


C F C




C
F

F



C

R
C R





R F


18H-CC
V M F R F
F F C

?

C



F



F ?

R C R





F F


19H-CC NN11D
V G–M

F
C F C




C F

F F



F F R

C R






F


20H-CC NN11A
V G–M



C
C




A C

F F

F F F


R C R





R F

C
21H-CC NN10A
V G–M



C
C




C C
R
F


F F


R C R






F

C
22H-CC NN9
V G–M



F C C




A C


F
F
p



F C R






F


23H-CC
V G–M




C A R



C F


F
F
R




C F










24H-1, top
V G–M



F C A ?



A



R R R






C







R


24H-CC
V G–M



F C C R



A C


F F R
R




C R






F


25H-CC NN7
V G–M



F C C



R A



R F







C R






F


Notes: Abundance: V = very abundant, A = abundant, C = common, F = few, R = rare, p = present, ? = questionable, * = reworked. Preservation: G = good, M = moderate. See "Calcareous nannofossils" in the "Site U1312–U1315 methods" chapter. FO = first occurrence, LO = last occurrence.

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