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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.