Geologic time scale

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Across
  1. 3. no longer exists
  2. 4. process where all substances of plants and animals decay
  3. 8. the most recent era where humans came in
  4. 11. organic material being converted into stone
  5. 13. original material being preserved not replaced
  6. 14. specific age of something
  7. 15. indicate the boundaries of geological time
Down
  1. 1. type of fossilization that preserves the whole body
  2. 2. oldest rock layer is on the bottom
  3. 5. age of an animal in comparison to another
  4. 6. era between the paleozoic and and cenozoic eras
  5. 7. sticky substance that hardens and preserves insects
  6. 9. water replace original tissue with minerals
  7. 10. era in geologic time scale with the biggest extinction of all time
  8. 12. provides indirect evidence of life