geologic time line ashley

By ashleyjensen12

  • Cambrian 570 M-500 M

    Cambrian 570 M-500 M
    this is the earliest Record of Marine life- Trilobites are dominant.

  • ordovician 500 M - 435 M

    ordovician 500 M - 435 M
    invertebrates are dominant, mollusks become abundant. earliest fish that are jawless and later, jawed and ammored fish.

  • silurain 435 M - 395 M

    silurain 435 M - 395 M
    Earliest terrestrial plants and animals.
    tiktaalik evrypterids develop.

  • Devonian 395 M - 345 M

    Devonian 395 M - 345 M
    Amored fish go extinct, but abundance of several species of fish. earliest amphibians and ammonites.

  • carboniferous 345 M - 280 M

    carboniferous 345 M - 280 M
    abundent sharks and amphibians. large swamps and coal forming forests. earliest reptials

  • Permian 280 M - 225 M

    Permian 280 M - 225 M
    extinction of many types of marine animals including trilobites.

  • trassic 225 M - 195 M

    trassic 225 M - 195 M
    earliest dinosaurs, abundent cycades and conifers.

  • jurassic 195 M - 136 M

    jurassic 195 M - 136 M
    earliest birds and mammals abundent dinnosaurs and ammonties.

  • cretaceous 136 M - 65 M

    cretaceous 136 M - 65 M
    earliest flowering plants, climax of dinosaurs fallowed by there extinction. great decline of branchiopods. abundance of bony fish.

  • tertiary 65 M - 1.8 M

    tertiary 65 M - 1.8 M
    earliest plavental mammels, modern mammels, large running mammels.

  • quaternary 1.8 M -present

    quaternary 1.8 M -present
    large carnivores, neanderthals, humans, mastodons.