Table T2. Ages of biostratigraphically useful radiolarian datums calibrated to the Berggren et al. (1995b) geomagnetic polarity time scale.
Age
(Ma) |
Radiolarian
event
|
Source
|
---|---|---|
0.18 | FO Buccinosphaera invaginata | Johnson et al., 1989 |
0.46 | LO Stylatractus universus | Caulet, 1991 |
0.83 | LO Pterocanium trilobum | Lazarus, 1992 |
1.81 | Pliocene/Pleistocene boundary | |
1.92 | LO Eucyrtidium calvertense | Lazarus, 1992 |
1.93 | FO Lithelius nautiloides | Caulet, 1991 |
1.93 | FO Triceraspyris antarctica | Caulet, 1991 |
2.42 | LO Helotholus vema | Lazarus, 1992 |
2.44 | LO Desmospyris spongiosa | Lazarus, 1992 |
2.61 | FO Cycladophora davisiana | Lazarus, 1992 |
3.5 | LO Prunopyle titan | Lazarus, 1992 |
4.57 | FO Helotholus vema | Lazarus, 1992 |
4.98-5.01 | FO Desmospyris spongiosa | Caulet, 1991 |
5.01-5.11 | FO Prunopyle titan | Caulet, 1991 |
5.03 | LCO Lychnocanoma grande | Lazarus, 1992 |
5.2 | Miocene/Pliocene boundary | |
6.1 | LO Amphymenium challengerae | Lazarus, 1992 |
6.58 | FO Amphymenium challengerae | Lazarus, 1992 |
6.79 | FO Lamprocyrtis heteroporos | Morely and Nigrini, 1995 |
7.71 | FO Acrosphaera? labrata | Lazarus, 1992 |
9.12 | LO Cycladophora spongothorax | Lazarus, 1992 |
9.22 | FCO Stichocorys peregrina | Lazarus, 1992 |
9.32 | LCO Ceratocyrtis stigi | Lazarus, 1992 |
9.83 | FCO Ceratocyrtis stigi | Lazarus, 1992 |
10.36 | FO Acrosphaera australis | Lazarus, 1992 |
10.53 | LO Cycladophora humerus | Lazarus, 1992 |
10.61 | FO Eucyrtidium pseudoinflatum | Lazarus, 1992 |
10.77 | LO Actinomma golownini | Lazarus, 1992 |
12.55 | FO Cycladophora spongothorax | Lazarus, 1992 |
12.68 | FO Dendrospyris megalocephalis | Lazarus, 1992 |
13.61 | FO Actinomma golownini | Lazarus, 1992 |
14.18 | FO Cycladophora humerus | Lazarus, 1992 |
17.02 | FO Eucyrtidium punctatum | Lazarus, 1992 |
19.11 | FO Cycladophora golli regipileus | Lazarus, 1992 |
20.72 | FO Cyrtocapsella longithorax | Lazarus, 1992 |
22.48 | FO Cyrtocapsella tetrapera | Harwood et al., 1992 |
23.35-24.73 | LO Lithomelissa sphaerocephalis | Takemura and Ling, 1997 |
23.8 | Oligocene/Miocene boundary | |
23.94-25.26 | FO Cycladophora campanula | Caulet, 1991 |
23.94-25.26 | FO Gondwanaria hister | Caulet, 1991 |
24.12-?28.75 | LO Axoprunum irregularis | Takemura and Ling, 1997 |
26.77-30.05 | LO Eucyrtidium antiquum | Caulet, 1991 |
26.77-30.05 | LO Lophocyrtis longiventer | Caulet, 1991 |
?28.28-29.40 | FO Calocyclas sp. A | Takemura and Ling, 1997 |
?28.28-29.40 | LO Lithomelissa challengerae | Takemura and Ling, 1997 |
28.75-30.10 | LO Lychnocanoma conica | Takemura and Ling, 1997 |
30.48-?33.06 | LO Calocyclas cf. semipolita | Takemura and Ling, 1997 |
30.94-34.66 | FO Axoprunum irregularis | Takemura and Ling, 1997 |
30.94-34.66 | FO Eucyrtidium antiquum | Takemura and Ling, 1997 |
30.94-34.66 | LO Eucyrtidium spinosum | Takemura and Ling, 1997 |
Note: FO = first occurrence, LO = last occurrence, LCO = last common occurrence, FCO = first common occurrence (Shipboard Scientific Party, 1999b).