Previous   |   Close   |   Next

Table T13. Distribution of diatoms, Hole U1312A.

Core,
section
 Abundance Preservation Transects Actinocyclus ingens Actinocyclus marginatus Alveus marinus Alveus marinus fragments Chaetoceros resting spores Coscinodiscus nodulifera Coscinodiscus radiatus Denticula spp. Ethmodiscus spp. fragments Fragilariopsis doliolus fragments Fragilariopsis fossilis Fragilariopsis aff. pseudocylindra Fragilariopsis reinholdii Fragilariopsis reinholdii fragments Hemidiscus cuneiformis Nitzschia panduriformis Paralia sulcata Proboscia alata Raphoneis spp. Rhizosolenia spp. Rhizosolenia bergonii Rhizosolenia hebetata sp. Stephanopyxis grunowii Synedra spp. Thalassionema nitzschioides nitzschioides Thalassionema nitzschioides lanceolata Thalassiosira spp. Thalassiosira convexa Thalassiosira eccentrica Thalassiosira leptopus Thalassiosira oestrupii venrickae Thalassiosira oestrupii oestrupii Thalassiosira trifulta Thalassiothrix spp. Total diatoms (processed) Silicoflagellates
Zone
Event
Processed Raw
306-U1312A-
1H-2 F T M–P 1


6 1
4

2














1


1


6 21
F. doliolus
1H-CC T t VP 6





2








1


1




4






8 1

2H-CC T t P 5



7












1 2

1


2






13


3H-CC C T M–P 1 1 1
8

2



1 3 4 3
2 1



1


1
6
13
6 2 55 6 A. marinus LO F. reinholdii (0.50 Ma)
4H-CC C T M–P 1

1 11





3
5
11 1




2
2 2 1

1 1 3 18 3 2 67 3

5H-CC T t P 1


1

1

















2






1 5


6H-CC C T M–P 1


7 3 12 1
1
1
1
7





1

1

3 2 2
1
1 44 4 T. convexa/jouseae LO T. convexa (2.40 Ma)
7H-CC B

1

































0


8H-CC R t P 1

6
1

1





3








2



1

2 1 17


9H-CC B

1

































0


10H-CC T t P 1



1





















1





2


11H-CC T t P 1




1












1













2


12H-CC B

1

































0


13H-CC B

1

































0


14H-CC B

1

































0


15H-CC B t
1

































0


16H-CC B

1

































0


17H-CC t
VP 1


























1





1


18H-CC B

1

































0


19H-CC B

1

































0


20H-CC B

1

































0


21H-CC B

1

































0


22H-CC B

1

































0


23H-CC B

1

































0


24H-CC B

1





































25H-CC B

1





































Notes: Abundance: C = common, F = few, R = rare, T = trace, t = single occurrence or fragment, B = barren. Preservation: G = good, M = Moderate, P = poor, VP = very poor. See "Diatoms" in the "Site U1312–U1315 methods" chapter. LO = last occurrence.

Previous   |   Close   |   Next  |   Top of page