Geologic Timescale

By tswain
  • Cambrian Period-570-500MYA

    Cambrian Period-570-500MYA

    Earliest marine life recorded. Abundant amout of Trilobite.
  • Ordovician Period - 500-435 MYA

    Ordovician Period - 500-435 MYA

    Echinoderms, Invertabrates, mollusks, jawed and armored fish.
  • Silurian Period - 435-395MYA

    Silurian Period - 435-395MYA

    Tiktaalik
  • Devonian Period - 395-345 MYA

    Devonian Period - 395-345 MYA

    Armored fish go extinct. ammonites and amphibians
  • Carboniferous Period - 345-280 MYA

    Carboniferous Period - 345-280 MYA

    Reptiles, Scale trees, seed ferns
  • Permian Period - 280-225 MYA

    Permian Period - 280-225 MYA

    Pangea, or the 'Super continent'
  • Triassic Period - 225-195 MYA

    Triassic Period - 225-195 MYA

    Earliest dinosaurs, cycads, and conifers
  • Jurassic Period - 195-136 MYA

    Jurassic Period - 195-136 MYA

    Earliest birds and mammals
  • Cretaceous Period - 136-65 MYA

    Cretaceous Period - 136-65 MYA

    Age of Dinosaurs
  • Teritary Period - 65-1.8 MYA

    Teritary Period - 65-1.8 MYA

    Age of Mammals

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