| Clue | Source | Date |
|---|---|---|
| Geological era | Eugene Sheffer | 05 Jan 2023 |
| Ice zooms during this geological period | Irish Times Simplex | 01 Jul 2015 |
| Era when dinosaurs were dominant | ||
| One era | ||
| Era of the dinosaurs | ||
| Geologic era when plants and dinosaurs appeared | ||
| Era in which dinosaurs became extinct |