The Geologic Time Scale

By tshanda
  • Cambrian 570-500 MYA

    Cambrian 570-500 MYA
    Earliest Record of marine life.
  • Period: to

    The Geologic Time Scale

  • Ordovician 500-435 MYA

    Ordovician 500-435 MYA
    Invertebrates are dominant. Mollusks become abundunt, Earliest fish are jawless, and later jawed and armored fish.
  • 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. Abundance of several species of fish.
  • carboniferous 345-280 MYA

    carboniferous 345-280 MYA
    abundant sharks and amphibians. Large swamps and coal forming forests.
  • Permian 280-225 MYA

    Permian 280-225 MYA
    extinction of many types of marine life such as trilobites
  • Triassic 225-195 MYA

    Triassic  225-195 MYA
    earliest dinosaurs, abundant cyads and conifers.
  • Jurrasic 195-136 MYA

    Jurrasic  195-136 MYA
    Earliest birds and mammals abundant dinosaurs and ammonites.
  • Cretacious 136-65 MYA

     Cretacious 136-65 MYA
    Earliest flowering plants, climax of dinosaurs following their extinction. Great decline of brachiopods. Abundance of bony fish.
  • Tertiary 65-1.8 MYA

    Tertiary 65-1.8 MYA
    Earliest placental mammals, modern mammals, large running animals.
  • Quaternary 1.8 MYA-Present

    Quaternary 1.8 MYA-Present
    large carnivors and, neanderthals, humans, and mastodons.