Event
|
Minimum depth
|
Maximum depth
|
Age (Ma)
|
|---|---|---|---|
| 183-1138A- | 183-1138A- | ||
| FAD H. vema | 12R-3, 20 | 13R-1, 105 | 4.58 |
| LAAD L. grande | 12R-2, 22 | 12R-3, 20 | 5.02 |
| LAD A. challengerae | 12R-2, 22 | 12R-3, 20 | 6.10 |
| FAD A. challengerae | 12R-3, 20 | 13R-1, 105 | 6.65 |
| FAD A. labrata | 13-4R, 105 | 13R-5, 30 | 7.80 |
| LCO L. stigi | 13-4R, 105 | 13R-5, 30 | 9.30 |
| LAD C. spongothorax | 14R-1, 20 | 14R-2, 20 | 9.12 |
| FCO S. peregrina | 14R-1, 20 | 14R-2, 20 | 9.22 |
| ET A. murrayana > australis | 17R-5, 20 | 18R-1, 20 | 10.37 |
| FAD E. pseudoinflatum | 17R-5, 20 | 18R-1, 20 | 10.61 |
| LAD A. golownini | 17R-5, 20 | 18R-1, 20 | 10.77 |
| FAD C. spongothorax | 18R-3, 20 | 18R-5, 105 | 12.55 |
Notes: Information after Lazarus (1992, 2001). FAD = first appearance datum, LAAD = last abundance appearance datum, LAD = last appearance datum, LCO = last common occurrence, FCO = first common occurrence, ET = evolutionary transition. Events in bold are formal zonal markers.