Geological time

  • Period: 541 BCE to 250 BCE

    Palaeozoic ERA

    Age of invertebrates
  • Period: 539 BCE to 485 BCE

    Cambrian

  • Period: 485 BCE to 444 BCE

    Ordovician

    widespread marine algaes
  • 450 BCE

    widespread marine algae

    widespread marine algae
  • Period: 443 BCE to 419 BCE

    Silurian

  • Period: 419 BCE to 359 BCE

    Devonian

  • Period: 359 BCE to 299 BCE

    Carboniferous

  • Period: 299 BCE to 252 BCE

    Permian

  • Period: 252 BCE to 66 BCE

    Mesozoic ERA

  • Period: 251 BCE to 201 BCE

    Triassic

  • Period: 201 BCE to 145 BCE

    Jurassic

  • Period: 145 BCE to 66 BCE

    Cretaceous

  • Period: 66 BCE to 1 BCE

    Cenozoic ERA

  • Period: 66 BCE to 2 BCE

    Tertiary

  • Period: 3 BCE to 50

    Quaternary