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Table T9. Recognized nannofossil events and their depths, Site C0009. (See table notes.)
Zone (base)
|
Nannofossil event |
Age (Ma) |
Degree of reliability |
Event top |
Event bottom |
Mean depth MSF (m) |
Cuttings
sample
|
Bottom depth MSF (m)* |
Cuttings
sample |
Bottom depth MSF (m)* |
|
|
|
|
319-C0009A-
|
319-C0009A-
|
|
NN20
|
LO Pseudoemiliania lacunosa |
0.436 |
B |
Above 2-SMW |
<712.7 |
Above 2-SMW |
<712.7 |
<712.7 |
|
LCO Reticulofenestra asanoi |
0.905 |
A |
19-SMW |
777.7 |
21-SMW |
787.7 |
782.7 |
|
LCO large Gephyrocapsa (>5.5 µm) |
1.24 |
B |
33-SMW |
842.7 |
35-SMW |
852.7 |
847.7 |
|
LO Helicosphaera sellii |
1.34 |
D |
44-SMW |
897.7 |
45-SMW |
902.7 |
900.2 |
|
LO Calcidiscus macintyrei (≥11 µm) |
1.60 |
D |
45-SMW |
902.7 |
47-SMW |
912.7 |
907.7 |
NN19
|
LO Discoaster brouweri |
2.06 |
A |
51-SMW |
927.7 |
52-SMW |
932.7 |
930.2 |
NN18
|
LO Discoaster pentaradiatus |
2.393 |
A |
56-SMW |
952.7 |
57-SMW |
957.7 |
955.2 |
NN17
|
LO Discoaster surculus |
2.52 |
A |
61-SMW |
977.7 |
63-SMW |
987.7 |
982.7 |
|
LO Discoaster tamalis |
2.87 |
A |
77-SMW |
1052.7 |
79-SMW |
1062.7 |
1057.7 |
|
LO Sphenolithus spp. |
3.65 |
A |
115-SMW |
1232.7 |
117-SMW |
1242.7 |
1237.7 |
NN16
|
LO Reticulofenestra pseudoumbilicus (>7 µm) |
3.79 |
A |
123-SMW |
1272.7 |
125-SMW |
1282.7 |
1277.7 |
NN12
|
LO Discoaster quinqueramus |
5.59 |
A |
125-SMW |
1282.7 |
127-SMW |
1292.7 |
1287.7 |
|
PE Reticulofenestra pseudoumbilicus (>7 µm) |
7.077 |
C |
167-SMW |
1482.7 |
169-SMW |
1492.7 |
1487.7 |
|
FCO Discoaster surculus |
7.88 |
C |
Below base of section |
>1603.2 |
NN11
|
FO Discoaster berggrenii |
8.52 |
D |
Below base of section |
>1603.2 |
Notes: * = Bottom depth is used for each cuttings sample representing a 5 m interval. LO = last occurrence, LCO = last consistent occurrence, RE = reentrance, PE = paracme end, FCO = first consistent occurrence, FO = first occurrence. Degree of reliability: A = distinct, well defined, and based on LO; B = indistinct and less well defined but based on LO; C = distinct and well defined but based on FO; D = indistinct, poorly defined, and based on FO or incomplete range (modified from Raffi et al., 2006, to accommodate the status of stratigraphic occurrence in cuttings at Site C0009).
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