Geologic Time Scale

  • Cambrian 570-500

    Cambrian 570-500
    Cambrian period, beggining of the Pelozoic, first time multicellula life forms flourished the Earth.
  • Period: to

    Geologic Time Scale

  • Ordovician 500-435

    Ordovician 500-435
  • Silurian 435-395 MYA

    Silurian 435-395 MYA
    Earliest terrestrial plants and animals.
  • Devonian 395-345 MYA

    Devonian 395-345 MYA
    Armored fish go extinct, but abundance of several species of fish. Ealiest amphibian ammonites.
  • Carboniferous 345-280 MYA

    Carboniferous 345-280 MYA
    Abundant sharks and amphibians large swamps and coal forming forests.Earliest raptiles. Scale trees and seed ferns.
  • 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.
  • Jurassic 195-136 MYA

    Jurassic 195-136 MYA
    Earliest birds and mammals. Abundant dinosaurs and ammonites.
  • Cretaceous 136-65 MYA

    Cretaceous 136-65 MYA
    Earliest flowering plants, climax of dinosaurs, followed by there extinction. Great decline of branchiopads. Abundants of bony fish.
  • Tertiary 65-1.8 MYA

    Tertiary 65-1.8 MYA
    Earliest placement mammals modern mammals large running mammals.
  • Quaternary 1.8-Present

    Quaternary 1.8-Present
    LArge carnivores Neanderthals, humans astondons.