Rawr

Geological Timeline~

By spazzypandamonium

  • Cambrian Period- 570 – 500 MYA

    Cambrian Period- 570 – 500 MYA
    Earliest Record of Marine life- Trilobites are dominant

  • Ordovician 500M- 435 M

    Ordovician 500M- 435 M
    Inertebrates dominant. Mollusk of great numbers. Earliest jawless fish. Later, jawed and armored fish appeared.

  • Silurian 435 M- 395M

    Silurian 435 M- 395M
    Earliest terrestrial plants and animals. Tiktaalik
    Eurypterids develop.

  • Devonian 395 M- 345M

    Devonian 395 M- 345M
    Armored fish- Extinct
    Great amount of different fish species
    Earliest amphibians and ammonites.

  • Carboniferous 345M-280M

    Carboniferous 345M-280M
    Sharks and amphibians abundant.
    Mass swamps and coal-forming forest.
    Earliest reptiles.
    Scale trees and Seed ferns

  • Permian 280 M-225M

    Permian 280 M-225M
    Extinction of many marine animals- trilobites included.

  • Triassic- 225M-195M

    Triassic- 225M-195M
    Earliest dinosaurs roam the Earth. Cycads and confiers abundant.

  • Jurassic- 195M-136M

    Jurassic- 195M-136M
    Earliest birds and mammals. Multtude of dinosaurs and ammonites.

  • Cretaceous- 136M-65M

    Cretaceous- 136M-65M
    Earliest flowering plants
    Dinosaurs- climax, then extinction.
    Decline of brachiopods.
    Bony fish.

  • Tertiary- 65 M- 1.8M

    Tertiary- 65 M- 1.8M
    Earliest Placental Mammals.
    Modern Mammals
    Large Running Mammals.

  • Quaternary- 1.8 M – Present

    Quaternary- 1.8 M – Present
    Large Carnivores, Neanderthals, Humans, mastodons