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Geological time

  • Period: 541 BCE to 252 BCE

    Paleozoic Era

  • Period: 541 BCE to 485 BCE

    Cambrian period

  • Period: 485 BCE to 444 BCE

    Ordovician period

  • Period: 444 BCE to 419 BCE

    Silurian period

  • Period: 419 BCE to 359 BCE

    Devonian period

  • Period: 359 BCE to 299 BCE

    Carboniferous period

  • Period: 299 BCE to 252 BCE

    Permian period

  • Period: 256 BCE to 66 BCE

    Mesozoic Era

  • Period: 252 BCE to 201 BCE

    Triassic period

  • Period: 201 BCE to 145 BCE

    Jurassic period

  • Period: 145 BCE to 66 BCE

    Cretaceous period

  • Period: 66 BCE to 50

    Cenozoic Era

  • Period: 66 BCE to 3 BCE

    Tertiary period

  • Period: 3 BCE to 50

    Quaternary period