Across
- 2. began 10000 years old
- 7. oceans water floods continents
- 8. middle era
- 9. youngest era
- 10. oldest era
- 11. longest units of geologic time
- 13. mesozoic flying reptiles
- 14. dominant mesozoic land vertebrates
Down
- 1. ancient landmass
- 3. first eopch
- 4. two continents that were previously separated
- 5. oxygen-poor environment
- 6. earth´s surface is covered by glaciers
- 10. mesozoic marine reptiles
- 12. smallest unit of time