Dana's Geologic Timeline

By danaloraine

  • Cambrian

    Cambrian
    Earliest Record of Marine life - Trilobites dominant.

  • Ordovician

    Ordovician
    Echinoderms: Starfish, Sand dollar , sea urchin and sea cucumbers. Invertebrates are dominant, Lots of mollusks. Earliest Fish without jaws and then jawed and armored fish came later.

  • Silurian

    Silurian
    Earliest terrestrial plants and animals. Tiktaalik
    Eurypterids develop.

  • Devonian

    Devonian
    Armored fish go extinct, but lots of several species of fish. Earliest amphibians and ammonites.

  • Carboniferous

    Carboniferous
    Lots of sharks and amphibians. Large swamps and coal forming forests. Earliest reptiles. Scale trees and seed ferns.

  • Permian

    Permian
    Extinction of many types of marine animals including trilobites. :(

  • Triassic

    Triassic
    Earliest Dinosaurs, lots of cycads and conifers.

  • Jurassic

    Jurassic
    Earliest birds and a lot of mammals, Dinosaurs and ammonites

  • Cretaceous

    Cretaceous
    Earliest flowering plants, high point of dinosaurs followed by their extinction. Great decress of brachiopods. Lots of of bony fish.

  • Tertiary

    Tertiary
    Earliest Placental Mammals, modern mammals, large running mammals

  • Quaternary

    Quaternary
    Large Carnivores, Neanderthals, Humans, mastodons