What happened in Archean eon?

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Tags

  1. #million
  2. #primitive
  3. #earth
  4. #billion
  5. #formal
  6. #period
  7. #emerge
  8. #first
  9. #earliest
  10. #archean
  11. #archaean
  12. #eoarchean
  13. #formed
  14. #records
  15. #spelled
  16. #oceans
  17. #earlier
  18. #about
  19. #precambrian
  20. #years
  21. #atmosphere
  22. #divisions