 
 
Table T2.
Calcareous nannofossil datums used during Leg 181.
 
  
   
 
   Age 
  
   (Ma)
  
   Nannofossil
   events
   
  
   References
   
  
 
  
   
 
   0.085
  
   Bottom acme Emiliania
   huxleyi
  
   Berggren et al. (1995a)
  
  
   
 
   0.16
  
   LO Helicosphaera
   inversa
  
   Sato and Kameo (1996)
  
  
   
 
   0.24
  
   FO Emiliania huxleyi
  
   Naish et al. (1998)
  
  
   
 
   0.42
  
   LO Pseudoemiliania
   lacunosa
  
   Sato and Kameo (1996)
  
  
   
 
   0.78
  
   Top acme Gephyrocapsa
   parallela
  
   Matsuoka and Okada (1989)
  
  
   
 
   0.85
  
   LO Reticulofenestra
   asanoi
  
   Sato and Kameo (1996)
  
  
   
 
   0.90
  
   Top dominance Gephyrocapsa
   (small)
  
   Young et al. (1994)
  
  
   
 
   0.95
  
   FO Gephyrocapsa
   parallela
  
   Sato and Kameo (1996)
  
  
   
 
   1.14
  
   Bottom dominance Gephyrocapsa
   (small)
  
   Young et al. (1994)
  
  
   
 
   1.16
  
   FO Reticulofenestra
   asanoi
  
   Sato and Kameo (1996)
  
  
   
 
   1.20
  
   LO Gephyrocapsa (large)
  
   Sato and Kameo (1996)
  
  
   
 
   1.26
  
   LO Helicosphaera
   sellii
  
   Sato and Kameo (1996)
  
  
   
 
   1.44
  
   FO Gephyrocapsa (large)
  
   Sato and Kameo (1996)
  
  
   
 
   1.60
  
   LO Calcidiscus
   macintyrei
  
   Raffi et al. (1993)
  
  
   
 
   1.67
  
   FO Gephyrocapsa (medium)
  
   Raffi and Flores (1995)
  
  
   
 
   1.96
  
   LO Discoaster brouweri
  
   Raffi and Flores (1995)
  
  
   
 
   2.30
  
   LO Discoaster
   pentaradiatus
  
   Wei (1993)
  
  
   
 
   2.61
  
   LO Discoaster surculus
  
   Raffi and Flores (1995)
  
  
   
 
   2.76
  
   LO Discoaster tamalis
  
   Raffi and Flores (1995)
  
  
   
 
   3.54
  
   LO Sphenolithus
   neoabies
  
   Spencer-Cervato et al.
   (1994)
  
  
   
 
   3.82
  
   LO Reticulofenestra
   pseudoumbilicus
  
   Raffi and Flores (1995)
  
  
   
 
   ~3.88
  
   Acme Gephyrocapsa
   (small)
  
   Rio (1992)
  
  
   
 
   4.0
  
   FO Pseudoemiliania
   lacunosa
  
   Gartner (1990)
  
  
   
 
   4.13
  
   FO Discoaster
   asymmetricus
  
   Shackleton et al. (1995)
  
  
   
 
   5.56
  
   LO Discoaster
   quinqueramus
  
   Raffi and Flores (1995)
  
  
   
 
   7.39
  
   FO Amaurolithus primus
  
   Backman and Raffi (1997)
  
  
   
 
   7.73
  
   LO Minylitha convallis
  
   Shackleton et al. (1995)
  
  
   
 
   9.34
  
   FO Minylitha convallis
  
   Raffi and Flores (1995)
  
  
   
 
   9.64
  
   LO Cantinaster
   calyculus
  
   Backman and Raffi (1997)
  
  
   
 
   10.5
  
   FO Discoaster bellus
  
   Gartner (1992)
  
  
   
 
   10.79
  
   FO Cantinaster
   coalitus
  
   Backman and Raffi (1997)
  
  
   
 
   10.94
  
   LO Coccolithus
   miopelagicus
  
   Backman and Raffi (1997)
  
  
   
 
   12.34
  
   FO Calcidiscus
   macintyrei
  
   Raffi and Flores (1995)
  
  
   
 
   12.65
  
   LO Calcidiscus
   premacintyrei
  
   Raffi and Flores (1995)
  
  
   
 
   13.19
  
   LO Cyclicargolithus
   floridanus
  
   Raffi and Flores (1995)
  
  
   
 
   13.52
  
   LO Sphenolithus
   heteromorphus
  
   Backman and Raffi (1997)
  
  
   
 
   16.21
  
   LO acme Discoaster
   deflandrei
  
   Raffi and Flores (1995)
  
  
   
 
   17.40
  
   FO Calcidiscus
   premacintyrei
  
   Backman and Raffi (1997)
  
  
   
 
   17.80
  
   LO Sphenolithus
   dissimilis
  
   Gartner (1992)
  
  
   
 
   18.20
  
   FO Calcidiscus
   leptoporus
  
   Gartner (1992)
  
  
   
 
   18.30
  
   LO Sphenolithus
   belemnos
  
   Berggren et al. (1995b)
  
  
   
 
   18.60
  
   FO Sphenolithus
   heteromorphus
  
   Backman et al. (1990)
  
  
   
 
   19.20
  
   FO Sphenolithus
   belemnos
  
   Berggren et al. (1995b)
  
  
   
 
   19.80
  
   FO Geminilithella
   rotula
  
   Young et al. (1994)
  
  
   
 
   22.30
  
   LO Ilselithina fusa
  
   Gartner (1992)
  
  
   
 
   23.20
  
   FO Discoaster druggii
  
   Berggren et al. (1995b)
  
  
   
 
   23.6
  
   LO Sphenolithus
   umbrellus
  
   Berggren et al. (1995b)
  
  
   
 
   23.9
  
   LO Dictyococcites
   bisectus
  
   Berggren et al. (1995b)
  
  
   
 
   24.3
  
   LO Sphenolithus
   delphix
  
   Berggren et al. (1995b)
  
  
   
 
   26.1
  
   LO Chiasmolithus altus
  
   Berggren et al. (1995b)
  
  
   
 
   27.5
  
   FO Sphenolithus
   distentus
  
   Berggren et al. (1995b)
  
  
   
 
   31.3
  
   LO Reticulofenestra
   umbilicus
  
   Morgans et al. (1996)
  
  
   
 
   32.8
  
   LO Ericsonia formosa
  
   Berggren et al. (1995b)
  
  
   
 
   33.30
  
   Acme Clausicoccus
   subdistichus
  
   Berggren et al. (1995b)
  
  
   
 
   ~34.6
  
   LO Discoaster
   saipanensis
  
   Berggren et al. (1995b)
  
  
   
 
   35.5
  
   FO Isthmolithus
   recurvus
  
   Morgans et al. (1996)
  
  
   
 
   38.0
  
   FO Dictyococcites
   bisectus
  
   Berggren et al. (1995b)
  
  
   
 
   58.3
  
   LO Hornibrookina
   teuriensis
  
   Berggren et al. (1995b)
  
  
   
 
   59.7
  
   FO Fasciculites
   tympaniformis
  
   Morgans et al. (1996)
  
  
   
 
   60.6
  
   FO Sphenolithus primus
  
   Berggren et al. (1995b)
  
  
   
 
   60.7
  
   FO Chiasmolithus
   bidens
  
   Berggren et al. (1995b)
  
  
   
 
   64.5
  
   FO Cruciplacolithus
   tenuis
  
   Berggren et al. (1995b)
  
  
   
 
   64.9
  
   FO Hornibrookina
   teuriensis
  
   Berggren et al. (1995b)
  
  
   
   65.0
  
   LO Micula spp.
  
   Berggren et al. (1995b)
  
Note: This table is also available in ASCII format.
