Karla's Historic Timeline

By sotokar

  • Cambrian 570-500 MYA

    Cambrian 570-500 MYA
    Earkiest record of marine life. Triolobites are dominant.

  • Ordovician 500-435 MYA

    Ordovician 500-435 MYA
    Echinoderms (starfish,sand dollar, etc.)
    Invertebrates were dominant. Mollusks became abundant and earliest fish that were jawless and later jawed and armored fish were present.

  • Silurian 435-395 MYA

    Silurian 435-395 MYA
    Earliest terrestrial plants and animals. Tikataalik Euryoterids develop.

  • Devonian 395-345 MYA

    Devonian 395-345 MYA
    Armored fish go extinct but there was an abundance of several species of fish. Earliest amphibians and ammonites.

  • Carboniferous 345-280 MYA

    Carboniferous 345-280 MYA
    The Mississippian and Pennsylvanian. Abundant sharks and amphibians. There were large swamps and coal was forming. Earliest reptiles found.

  • Permian 280-225 MYA

    Permian 280-225 MYA
    Extinction of many types of marine animals including trilobites.

  • Triassic 225-195 MYA

    Triassic 225-195 MYA
    Earliest dinosaurs and abundant cycads and conifers.

  • Jurassic 195-136 MYA

    Jurassic 195-136 MYA
    Earliest birds and mammals were abundant. Dinosaurs and ammonites were also present.

  • Cretaceous 136-65 MYA

    Cretaceous 136-65 MYA
    Earliest flowering plants. Climax of dinosaurs followed by their extinction. Great decline of brachiopods. There was an abundance of bony fish.

  • Tertiary 65-1.8 MYA

    Tertiary 65-1.8 MYA
    Earliest placental mammals. Modern mammals and large running mammals werre present as well.

  • Quaternary 1.8- Present

    Quaternary 1.8- Present
    Large carnivores and neanderthals. Humans evolved and mastodons.