| Answer | Crossword Clue |
|---|---|
| ICEAGE | Period of great glaciation |
| ICEAGE | Glaciation period |
| BOOM | Period of great growth |
| GOLDENAGE | Period of great prosperity. |
| GOLDENAGE | Period of great culture. |
| AGEOFGOLD | Period of great prosperity |
| ERIAN | Of a Great Lake period |
| EOCENE | Period of great climate change |
