Across
- 2. The time division directly below an Eon
- 3. The name of the earliest and longest part of Earth's history
- 6. The era we are currently in.
- 7. The epoch we currently live in
Down
- 1. The period known as the age of fishes
- 4. The most famous period of the Mesozoic, known for its giant reptiles
- 5. The time division directly below an Era