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).