Table T4.
Estimated ages of calcareous nannofossil events used during Leg 186, based on
the time scales of Cande and Kent (1995) and Berggren et al. (1995).
(base)
(Ma)
FO
acme
Emiliania huxleyi
0.085
1
LO
Helicosphaera
inversa
0.155
2
FO
Emiliania huxleyi
CN15
0.248
2
LO
Pseudoemiliania
lacunosa
CN14b
0.408
2
FO
Helicosphaera
inversa
0.505
2
LO
Reticulofenestra
asanoi
0.88
3
FO
Gephyrocapsa
parallela
CN14a
0.94
3
FO
Reticulofenestra
asanoi
1.17
3
LO
Helicosphaera
sellii
1.26
3
LO
Calcidiscus
macintyrei
1.64
3
FO
Gephyrocapsa
oceanica
1.64
3
FO
Gephyrocapsa
caribbeanica
CN13b
1.71
4
Pliocene/Pleistocene
boundary
1.745
2
LO
Discoaster
brouweri
CN13a
1.95
3
LO
Discoaster
pentaradiatus
CN12d
2.36
3
LO
Discoaster
surculus
CN12c
2.51
3
LO
Discoaster tamalis
CN12b
2.82
2
LO
Sphenolithus spp.
CN12a
3.62
5
LO
Reticulofenestra
pseudoumbilicus
CN12a
3.83
3
LO
Amaurolithus spp.
CN11
4.50
6
FO
Ceratolithus
rugosus
CN10c
5.046
7
FO
Ceratolithus
acutus
CN10b
5.089
7
LO
Triquetrorhabdulus
rugosus
5.231
7
Miocene/Pliocene
boundary
5.3
LO
Discoaster
quinqueramus
CN10a
5.537
7
LO
Amaurolithus
amplificus
5.993
7
FO
Amaurolithus
amplificus
6.840
7
LO
paracme R.
pseudoumbilicus
7.100
7
FO
Amaurolithus spp.
CN9b
7.392
7
FO
Discoaster
berggrenii
CN9a
8.281
7
FO
Discoaster
loeblichii
CN8b
8.7
8
FO
paracme R.
pseudoumbilicus
8.788
7
LO
Discoaster hamatus
CN8a
9.635
7
LO
Catinaster
calyculus
9.641
7
FO
Discoaster
neohamatus
10.450
7
FO
Discoaster hamatus
CN7
10.476
7
FO
Catinaster
calyculus
10.705
7
FO
Catinaster
coalitus
CN6
10.794
7
LO
Coccolithus
miopelagicus
10.941
7
LO
Discoaster kugleri
11.520
7
FO
Discoaster kugleri
CN5b
11.831
7
LO
Cyclicargolithus
floridanus
13.2
9
LO
Sphenolithus
heteromorphus
CN5a
13.523
7
LO
Helicosphaera
ampliaperta
CN4
15.6
8
LO
abundant
Discoaster deflandrei
16.2
9
FO
Sphenolithus
heteromorphus
CN3
18.2
8
LO
Sphenolithus
belemnos
18.3
8
FO
Sphenolithus
belemnos
CN2
19.2
8
FO
Discoaster druggii
CN1c
23.3
10
LO
Sphenolithus
capricornutus
23.7
8
Oligocene/Miocene
boundary
23.8
LO
Sphenolithus
delphix
23.8
8
LO
Reticulofenestra
bisecta
CN1a
23.9
8
Notes: FO = first occurrence, LO = last occurrence. References are as follows: 1 = Thierstein et al. (1977); 2 = modified from Takayama and Sato (1987), Sato et al. (1991), Takayama (1993), and Kameo et al. (1995); 3 = Wei (1993); 4 = Berger et al. (1994); 5 = Backman and Schackleton (1983); 6 = Backman et al. (1990); 7 = Backman and Raffi (1997); 8 = Berggren et al. (1995); 9 = Raffi and Flores (1995).