The BGS geological timeline site map

A site map of the geological timeline from the beginning.

  1. 4600-4500 million years ago, the Earth formed and its crust cooled to become solid.
  2. 4500-4400 million years ago, the oldest known thing to have formed on Earth, zircon, formed along with solid crust and oceans.
  3. 4400-4300 million years ago
  4. 4300-4200 million years ago
  5. 4200-4100 million years ago, the close of the Hadean Period (there are no surviving rocks).
  6. 4100-4000 million years ago, the oldest rocks are around 4000 million years old, but there is no evidence of life from this time.
  7. 4000-3900 million years ago, the first living organisms develop from chemicals.
  8. 3900-3800 million years ago
  9. 3800-3700 million years ago, bacteria start to form banded ironstones.
  10. 3700-3600 million years ago
  11. 3600-3500 million years ago
  12. 3500-3400 million years ago, the oldest known fossils?
  13. 3400-3300 million years ago
  14. 3300-3200 million years ago
  15. 3200-3100 million years ago, eobacterium — early fossil bacteria.
  16. 3100-3000 million years ago, the first dome builders: blue-green bacteria.
  17. 3000-2900 million years ago
  18. 2900-2800 million years ago
  19. 2800-2700 million years ago, did evolution take place faster than we think?
  20. 2700-2600 million years ago
  21. 2600-2500 million years ago
  22. 2500-2400 million years ago
  23. 2400-2300 million years ago
  24. 2300-2200 million years ago
  25. 2200-2100 million years ago, oxygen escapes into the atmosphere.
  26. 2100-2000 million years ago, the land is colonised?
  27. 2000-1900 million years ago
  28. 1900-1800 million years ago, detrital uraninite disappears
  29. 1800-1700 million years ago
  30. 1700-1600 million years ago
  31. 1600-1500 million years ago
  32. 1500-1400 million years ago, the oldest fossil eukaryotes are found in the Bitter Springs Formation, Australia.
  33. 1400-1300 million years ago
  34. 1300-1200 million years ago, life on the land? Fossil bacteria in ancient soils.
  35. 1200-1100 million years ago
  36. 1100-1000 million years ago
  37. 1000-900 million years ago
  38. 900-800 million years ago
  39. 800-700 million years ago, evolution of the first animals?
  40. 700-600 million years ago, the earliest fossilised, multicelled animals.
  41. 600-500 million years ago, shells and skeletons evolve as well as the first vertebrates — fish.
  42. 500-600 million years ago, the land turns green.
  43. 400-300 million years ago, animals colonise the land.
  44. 300-200 million years ago dinosaurs and the first mammals.
  45. 200-100 million years ago, the first birds and the first flowers.
  46. 100-0 million years ago, the last 'twelve months' of Earth's life.