Time Scale: History of Everything

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Across
  1. 3. Hadean Eon
  2. 6. Carboniferous
  3. 7. Jurassic
  4. 8. Devonian
  5. 10. Paleozoic Era
  6. 13. Triassic
  7. 14. Cenozoic Era
  8. 16. Quaternary
  9. 17. Threshold 2
  10. 20. Cretaceous
  11. 22. Threshold 6
  12. 24. The Cambrian ________
  13. 25. Threshold 8
  14. 27. Phanerozoic Eon
Down
  1. 1. Archean Eon Lands
  2. 2. Permian
  3. 4. Silurian
  4. 5. Ordovician
  5. 9. Threshold 5
  6. 11. Threshold 7
  7. 12. Mesozoic Era
  8. 15. Tertiary
  9. 18. Proterozoic Eon
  10. 19. Archean Eon Liquids
  11. 21. Threshold 3
  12. 23. Threshold 4
  13. 26. Threshold 1