Table T2. Ages and zonations of calcareous nannofossil datum levels used during Leg 184.
| Biohorizons | Zone (base) |
Age (Ma) |
Sources |
|---|---|---|---|
| FO Emiliania huxleyi acme | 0.09 | Berggren et al. (1995a) | |
| FO Emiliania huxleyi | CN15/NN21 | 0.26 | Berggren et al. (1995a) |
| LO Pseudoemiliania lacunosa | CN14b/NN20 | 0.46 | Berggren et al. (1995a) |
| LO Reticulofenestra asanoi | 0.83 | I. Raffi (unpubl. data) | |
| LO Gephyrocapsa acme (small) | CN14a | 1.01 | Gartner (1988); J.-P. Shyu et al. (unpubl. data) |
| FO Reticulofenestra asanoi | 1.16 | Kameo and Bralower (2000) | |
| FO Gephyrocapsa acme (small) | 1.22 | Gartner (1988); J.-P. Shyu et al. (unpubl. data) | |
| LO Helicosphaera sellii | 1.47 | Berggren et al. (1995a) | |
| LO Calcidiscus macintyrei | CN13/NN19b | 1.59 | Berggren et al. (1995a) |
| FO Gephyrocapsa spp. (medium) | 1.69 | I. Raffi (unpubl. data) | |
| LO Discoaster brouweri | CN13/NN19a | 1.95 | Berggren et al. (1995a) |
| LO Discoaster pentaradiatus | CN12d/NN18 | 2.52 | I. Raffi (unpubl. data) |
| LO Discoaster surculus | CN12c/NN17 | 2.53 | I. Raffi (unpubl. data) |
| LO Discoaster tamalis | CN12b | 2.83 | I. Raffi (unpubl. data) |
| LO Sphenolithus abies/neoabies | 3.66 | I. Raffi (unpubl. data); Shackleton et al. (1995) | |
| LO Reticulofenestra pseudoumbilicus | CN12a/NN16 | 3.82 | I. Raffi (unpubl. data) |
| LO Amaurolithus spp. (A. primus) | CN11a | 4.80 | Berggren et al. (1995a) |
| LO Ceratolithus acutus | 4.99 | Shackleton et al. (1995) | |
| FO Ceratolithus rugosus | CN10c/NN13 | 5.10 | Berggren et al. (1995a); I. Raffi (unpubl. data) |
| LO Triquetrorhabdulus rugosus | 5.23 | I. Raffi (unpubl. data) | |
| FO Ceratolithus acutus | CN10b | 5.37 | I. Raffi (unpubl. data) |
| LO Discoaster quinqueramus | CN10a/NN12 | 5.54 | I. Raffi (unpubl. data) |
| LO Amaurolithus amplificus | 5.99 | I. Raffi (unpubl. data) | |
| FO Amaurolithus amplificus | 6.76 | I. Raffi (unpubl. data) | |
| FO Amaurolithus primus | CN9b/NN11 | 7.39 | I. Raffi (unpubl. data) |
| FO Discoaster berggrenii | CN9a/NN11 | 8.20 | I. Raffi (unpubl. data) |
| FO Discoaster loeblichii | CN8b | 8.45 | Shackleton et al. (1995) |
| FO Discoaster pentaradiatus | 8.55 | Shackleton et al. (1995) | |
| FO Minylitha convallis | 9.30 | Berggren et al. (1995b) | |
| LO Discoaster hamatus | CN8a/NN10 | 9.40 | Shackleton et al. (1995) |
| FO Discoaster neohamatus | 9.60 | Shackleton et al. (1995) | |
| LO Catinaster calyculus | 9.64 | Backman and Raffi (1997) | |
| LO Catinaster coalitus | 9.69 | Backman and Raffi (1997) | |
| FO Catinaster calyculus | CN7b/NN9b | 10.70 | Berggren et al. (1995b) |
| FO Discoaster hamatus | CN7a/NN9a | 10.38 | Shackleton et al. (1995) |
| FO Catinaster coalitus | CN6/NN8 | 10.79 | Shackleton et al. (1995) |
| LO Discoaster kugleri | 11.52 | Backman and Raffi (1997) | |
| FO Discoaster kugleri | CN5b/NN7 | 11.83 | Backman and Raffi (1997) |
| FO Triquetrorhabdulus rugosus | 12.62 | Shackleton et al. (1995) | |
| LO Cyclicargolithus floridanus | 13.19 | Shackleton et al. (1995) | |
| LO Sphenolithus heteromorphus | CN5a/NN6 | 13.57 | Shackleton et al. (1995) |
| LO Helicosphaera ampliaperta | CN4/NN5 | 15.60 | Berggren et al. (1995b) |
| LO Discoaster deflandrei acme | 16.20 | Shackleton et al. (1995) | |
| FO Sphenolithus heteromorphus | 18.20 | Berggren et al. (1995b) | |
| LO Sphenolithus belemnos | CN3/NN4 | 18.30 | Berggren et al. (1995b) |
| FO Sphenolithus belemnos | CN2/NN3 | 19.20 | Berggren et al. (1995b) |
| FO Discoaster druggii | CN1c/NN2 | 23.20 | Berggren et al. (1995b) |
| LO Sphenolithus delphix | 23.80 | Berggren et al. (1995b) | |
| LO Dictyococcites bisectus | CN1a, CN1b/NN1 | 23.90 | Berggren et al. (1995b) |
| LO Zygrhablithus bijugatus | 24.5 | Berggren et al. (1995b) | |
| LO Sphenolithus ciperoensis | 25.5 | Berggren et al. (1995b) | |
| LO Sphenolithus distentus | CP19b/NP25 | 27.5 | Berggren et al. (1995b) |
| FO Sphenolithus ciperoensis | CP19a/NP24 | 29.9 | Berggren et al. (1995b) |
| FO Sphenolithus distentus | CP18 | 31.5 | Berggren et al. (1995b) |
| LO Reticulofenestra umbilicus | CP17/NP23 | 32.3 | Berggren et al. (1995b) |
| LO Ericsonia formosa | CP16c/NP22 | 32.8 | Berggren et al. (1995b) |
| FO Ericsonia subdisticha acme | CP16b | 33.3 | Berggren et al. (1995b) |
| LO Discoaster saipanensis | CP16a/NP21 | 34.2 | Berggren et al. (1995b) |
| LO Discoaster barbadiensis | 34.3 | Berggren et al. (1995b) | |
| FO Isthmolithus recurvus | CP15b/NP19 | 36 | Berggren et al. (1995b) |
| FO Chiasmolithus oamaruensis | NP18 | 37 | Berggren et al. (1995b) |
| LO Chiasmolithus grandis | CP15a | 37.1 | Berggren et al. (1995b) |
| FO Dictyococcites bisectus | 38 | Berggren et al. (1995b) |
Notes: FO = first occurrence, LO = last occurrence. The zonation codes are after Okada and Bukry (1980) and Martini and Müller (1986). Astrochronologically tuned biostratigraphic datums are depicted in bold.