TABLE 3.
GDGT abundance and composition in different MGP sediment layers
| Sediment sample | Depth (cm) | Conc (μg g−1) | % of total GDGTa
|
|||
|---|---|---|---|---|---|---|
| GDGT Ia | GDGT III | GDGT IV | GDGT VIII | |||
| 13GB02C | 0-1 | 0.6 | 63.0 | 12.4 | 4.6 | 20.1 |
| 13GB02C | 13-14 | 16.5 | 43.6 | 17.2 | 14.3 | 24.9 |
| 25GB13B | 0-1 | 0.2 | 49.0 | 19.2 | 8.8 | 23.1 |
| 25GB13B | 13-14 | 0.6 | 76.8 | 14.8 | 2.5 | 5.9 |
| 27GB15C | 0-1 | 0.8 | 63.1 | 10.7 | 6.3 | 19.9 |
| 27GB15C | 12-13 | 11.1 | 40.7 | 28.8 | 7.1 | 23.4 |
| 28GB16C | 0-1 | 0.8 | 61.0 | 13.2 | 4.3 | 21.5 |
| 28GB16C | 13-14 | 7.6 | 46.0 | 25.2 | 8.2 | 20.6 |
| 29GB18B | 0-1 | 0.3 | 68.8 | 19.9 | 2.2 | 9.9 |
| 29GB18B | 14-15 | 1.4 | 58.1 | 17.4 | 6.5 | 18.1 |
a
The chemical nomenclature for GDGT carbon skeleton moities is based on the scheme described by Schouten et al. (53).