Geological time

  • Period: 541 BCE to 552 BCE

    PALEOZOIC ERA

  • Period: 541 BCE to 485 BCE

    Cambrian

  • The arthropods
    500 BCE

    The arthropods

    Marine invertebrates with external skeletons
  • Period: 485 BCE to 444 BCE

    Ordovician

  • Marine algae
    460 BCE

    Marine algae

    And fishes without jaws
  • Period: 444 BCE to 419 BCE

    Silurian

  • First land plants
    430 BCE

    First land plants

  • Period: 419 BCE to 359 BCE

    Devonian

  • First amphibians
    385 BCE

    First amphibians

    Fish diversity
  • Period: 359 BCE to 299 BCE

    Carboniferous

  • First reptiles
    320 BCE

    First reptiles

    And forest of gigants ferns
  • Period: 299 BCE to 252 BCE

    Permian

  • Reptile diversity
    270 BCE

    Reptile diversity

  • Period: 252 BCE to 66 BCE

    MESOZOIC ERA

  • Period: 252 BCE to 201 BCE

    Triassic

  • First dinosaurs
    225 BCE

    First dinosaurs

    And first mammals
  • Period: 201 BCE to 145 BCE

    Jurassic

  • First birds
    170 BCE

    First birds

    First flying and aquatic reptiles, gymosperm plants dominate the earth's surface
  • Period: 145 BCE to 66 BCE

    Cretaceous

  • Extinction of dinosaurs and ammonites
    100 BCE

    Extinction of dinosaurs and ammonites

    and the first plants with flowers
  • Period: 66 BCE to 50

    CENOZOIC ERA

  • Period: 66 BCE to 2 BCE

    Tertiary

  • Development and diversification of mammals
    35 BCE

    Development and diversification of mammals

    And glaciation in the nothern hemisphere
  • Period: 2 BCE to 10

    Quaternary