Fossils and Geologic Time

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Across
  1. 5. animals get stuck in tar and freeze
  2. 9. replacing someone or something
  3. 10. usually amber or some copals
  4. 12. era between the Paleozoic and Cenozoicera the most recent geologic era
  5. 13. not living
  6. 15. an era between 2 eras
Down
  1. 1. dates to geological time events
  2. 2. young layers on bottom
  3. 3. old layers on top
  4. 4. animal or print preserved
  5. 6. when fuel is heated without air
  6. 7. stony substance
  7. 8. when rocks get substances inside
  8. 11. if a rock is older or younger
  9. 14. fossil or footprint