Table 1.
Average planktonic foraminiferal B/Ca and δ11B data during the PETM.
| average B/Ca µmol mol−1a |
|||||
|---|---|---|---|---|---|
| core site | species | below CIE onset | CIE core | post-CIE | ΔB/Cab |
| 1209 | M. velascoensis | 70.4 | 44.5 | 62.7 | 25.9 |
| 1209 | A. soldadoensis | 71.0 | 43.9 | 53.5 | 27.1 |
| 401 | M. subbotinae | 51.9 | 51.4 | 52.6 | 0.5 |
| 689 | Acarinina spp. | 49.3 | 29.8 | 49.2 | 19.5 |
| 690 | Acarinina spp. | 53.4 | 37.0 | 52.7 | 16.4 |
| Bass River | Acarinina spp. | 65.0 | 40.0 | 48.0 | 25.0 |
| Bass River | Morozovella spp. | 42.0 | 45.0 | ||
| Ancora | Acarinina spp. | 38.0 | 65.0 | ||
| Ancora | Morozovella spp. | 51.0 | 58.0 | ||
| 1209 | Subbotina spp. | 46.0 | 31.3 | 37.5 | 14.8 |
| 689 | Subbotina spp. | 37.3 | 24.9 | 39.2 | 12.4 |
| 690 | Subbotina spp. | 45.3 | 33.8 | 42.6 | 11.5 |
| Bass River | Subbotina spp. | 57.0 | 40.0 | 42.0 | 17.0 |
| Ancora | Subbotina spp. | 51.0 | 38.0 | 49.0 | 13.0 |
| average δ11B (‰)a | Δδ11B (‰)b | ||||
| 1209 | M. velascoensis | 15.5 | 14.7 | 15.3 | 0.9 |
| 401 | M. subbotinae | 14.7 | 14.0 | 14.3 | 0.7 |
| Bass River | Subbotina spp. | 13.5 | 12.5 | 1.1 | |
| Millville | Subbotina spp. | 12.7 | |||
aThe onset of the CIE is identified as the initial decrease in δ13C, core CIE is an interval of sustained low δ13C values (less than 70 kyr) and the post-CIE interval represents the recovery of δ13C to values below the CIE onset (70–200 kyr) (figure 2d).
bDifference between average values prior to the CIE onset and the CIE core interval.