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Earth's Geologic Timeline

By armajog

  • Cambrian Beginning 570-500 M

    Cambrian Beginning 570-500 M
    First ever living organisms existed at this time. These organisms were small, unicellular, and simple.

  • Ordovician Era

    Ordovician Era
    Echinoderms, invertebrates are dominant. Mollusks are abundant.

  • Silurian Era

    Silurian Era
    Earliest terrstrial plants and animals.

  • Devonian Era

    Devonian Era
    Armored fish go extinct, but abundance of several species of fish. Earliest amphibians and ammonites.

  • Carboniferous Era

    Carboniferous Era
    Large swamps, and coal forming forests.

  • Permian Era

    Permian Era
    Extinction of many types of marine animals including trilobites.

  • Triassic Era

    Triassic Era
    Earliest dinosaurs, abundant with cyads and conifers.

  • Jurassic Era

    Jurassic Era
    Earliest birds, and mammals, abundant dinosaurs and ammonites.

  • Cretacious Era

    Cretacious Era
    The climax of dinosaurs followed by their entire extinction. Lots of bony fish.

  • Tertiary Era

    Tertiary Era
    First appearance of Placental Mammals, modern mammals.

  • Quaternary Era

    Quaternary Era
    Large carnivores, humans, mastodons.