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.