Shaw Geologic Timeline

By Ryantshaw
  • Cambrian Period 570MYA-500MYA
    570 BCE

    Cambrian Period 570MYA-500MYA

    Earliest record of marine life, Trilobites were dominant. Oceans dominated
  • Ordovician 500MYA-435MYA
    500 BCE

    Ordovician 500MYA-435MYA

    Echinoderms. invertebrates are dominants. mollusks became abundant. Earliest fish that are jawless, and later jawed and armored fish
  • Silurian Period 435MYA-395MYA
    435 BCE

    Silurian Period 435MYA-395MYA

    Earliest terrestrial plants and animals. Tik-Taalik Eurypterids develop.
  • Devonian Period 395MYA-345MYA
    395 BCE

    Devonian Period 395MYA-345MYA

    Armored fish go extinct, but an abundance of several other species of fish develop. Earliest amphibians and ammonites
  • Carboniferous Period 345MYA-280MYA
    345 BCE

    Carboniferous Period 345MYA-280MYA

    Abundant sharks and amphibians. Large swamps and coal forming forests. Earliest reptiles, scale trees, and seed ferns
  • Permian Period 280MYA-225MYA
    280 BCE

    Permian Period 280MYA-225MYA

    Extinction of many marine animals including Trilosbites
  • Triassic Period 225MYA-195MYA
    225 BCE

    Triassic Period 225MYA-195MYA

    Earliest dinosaurs appear. There is an abundance of Cycads and Conifer trees/plants
  • Jurassic Period 195MYA-136MYA
    195 BCE

    Jurassic Period 195MYA-136MYA

    Earliest birds and mammals start to appear. An abundance of dinosaurs and ammonites.
  • Cretaceous Period 136MYA-65MYA
    136 BCE

    Cretaceous Period 136MYA-65MYA

    Earliest flowering plants. Climax of dinosaurs followed by their extinction. Great decline in the amount of Brachiopods. Abundance of boney fish.
  • Tertiary Period 65MYA-1.8MYA
    65 BCE

    Tertiary Period 65MYA-1.8MYA

    Earliest placental mammals are appearing. Modern mammals and large running mammals are also appearing.