Table T1. Shipboard biostratigraphic datums.
| Datum event |
Age (Ma) |
Core, section, interval (cm) |
Depth (mbsf) |
||||
|---|---|---|---|---|---|---|---|
Top
|
Bottom
|
Top
|
Bottom
|
Mean
|
|||
| LO Calcidiscus macintyrei | 1.67 | 8H-CC | 9H-2, 140 | 68.37 | 73.10 | 70.74 | |
| LO Discoaster brouweri | 1.95 | 10H-CC | 11H-3, 10 | 89.67 | 92.30 | 90.99 | |
| LO Discoaster surculus | 2.55 | 12H-CC | 13H-CC | 108.49 | 117.82 | 113.16 | |
| LO Discoaster tamalis | 2.83 | 13H-CC | 14H-CC | 117.82 | 127.45 | 122.64 | |
| LO Reticulofenestra pseudoumbilicus | 3.82 | 20H-CC | 21H-CC | 183.96 | 193.63 | 188.80 | |
| LO Amaurolithus tricorniculatus | 4.50 | 24H-CC | 25H-CC | 221.90 | 230.99 | 226.45 | |
| FO Discoaster asymmetricus | 5.02 | 26H-CC | 27H-CC | 241.53 | 250.87 | 246.20 | |
| LO Discoaster quinqueramus | 5.54 | 32H-CC | 33H-CC | 296.87 | 304.90 | 300.89 | |
Notes: Calcareous nannofossil datums were used to develop the biostratigraphic age model and to provide an estimate of stratigraphic position for the tuned core magnetic susceptibility model. LO = last occurrence, FO = first occurrence.