| Rating | Solver | Clue |
|---|---|---|
| NEOCENE | Geological period | |
| ERA | Geological period | |
| EON | Geological period | |
| AGE | Geological period | |
| JURASSIC | Geological period for Michael Crichton's park? | |
| ARCHAEAN | Ancient; pertaining to the earliest period in geological history. | |
| PERIOD | One of the great divisions of geological time; as, the Tertiary period; the Glacial period. See the Chart of Geology. | |