Across
- 2. 3.9-2.5BYA
- 5. The name of sedimentary rock layers
- 9. The preserved remains of an extinct animal or plant
- 10. The newest rock layers are on top of the older ones
- 13. The age of rock layers in comparison to one another
- 14. The large pieces of land that makes up the Earth's continents
- 19. 146-65MYA
- 21. The exact numerical age of rock layers
- 22. 408-360MYA
- 23. When an organism no longer is alive
Down
- 1. Cooled layers of volcanic material that cuts through strata layers
- 3. 438-408MYA
- 4. 360-280MYA
- 6. 505-438MYA
- 7. Characterized by a crosscutting of strata layers that shift the layers up or down
- 8. 208-146MYA
- 11. 540-500MYA
- 12. .01-1.8 MYA
- 15. 65-24MYA
- 16. 2.5billion-540MYA
- 17. 280-248MYA
- 18. 249-208MYA
- 20. 24-1.8MYA