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.