Bri's Geology Timeline

By briblonde
  • Cambrian

    Cambrian

    570M-500M
    Earliest record of marine life-- Trilobites are dominant.
  • Ordovician

    Ordovician

    500M-435M
    Echinoderms (star fish, sand dollars, Sea Urchan, and sea cucumbers). Invertebrates are dominant, mollusks become abundant. Earliest fish that are Jawless and later, jawed and armoured fish.
  • Silurian

    Silurian

    435M-395M
    Earliest terrestrial plants ande animal. Tiktaalik Eurypterids develop.
  • Devonian

    Devonian

    395M-345M
    Armoured fish go extinct but abundance of several species of fish.
  • Carboniferous

    Carboniferous

  • Permian

    Permian

    280mya-225mya
    This time period was full of extinction of many types of marine animals including tributes
  • Triassic

    Triassic

    225mya-195mya
    this era was the earliest dinosaurs, abundant cycads and conifers.
  • Jurassic

    Jurassic

    195mya-136mya
    This era was the earliest birds and mammals abundant dinosaurs and ammonites.
  • Cretaceous

    Cretaceous

    136mya-65mya
    Earliest floering plants, climax of dinosaurs followed by their extinction great decline of brachiopods, abundance of bony fish.
  • Tertiary

    Tertiary

  • Quaternary

    Quaternary

    1.8mya - today
    large carnivores, neanderthals, humans and mastodons.