| Answer | Crossword Clue |
|---|---|
| EPOCH | Period part |
| EOCENE | Tertiary Period part |
| EPOCH | Part of a period |
| HALFDAY | Part-timer's work period, perhaps |
| EPOCH | Part of a geological period. |
| DARKAGES | Early part of medieval period. |
| NEOCENE | Part of the Tertiary Period. |
| EMBERDAY | Part of a church period. |
| ICEAGE | Part of the Quaternary Period |
| EPOCH | Part of a period, geologically |
| EDO | ... Period (part of Japanese history) |
| NEOGENE | Latter part of the Tertiary period |
| STONEAGE | The Paleolithic period is part of it |
| DTS | Part of a drying-out period, maybe |
