Geological time Scale Science class period 7

By Cypress Bay High School

  • Precambrian period

    It covered almost 90% of the entire history of Earth.
    It has been divided into three areas:the Hadean,the Archean and the Proterozoic.
  • Period: to

    Hernandez period 7

    Geological Timescale

  • Teritary period

    Many early mammels become evolved or extinct.

  • Quatemary period

    Major changes in Earth's climate.

  • Jurassic period

    Dinosaurs become the dominant animals of the Earth

  • Triassic

    Dinosaurs were still on Earth but started to extinct,

  • Miocene

    Climate slowly cooling towards a series of ice age.

  • Ordivician period

    North of tropics were almost only ocean

  • Pilocene period

    There were different boundaries in the Earth plates.

  • Eocene period

    The atmosphere was low in comparison with more isotope.

  • Silurian period

    It was about the first mass extinction in earth.

  • Permian period

    Vast regions of deserts left behind.

  • Paleogene epoch

    Large group of diverse animals on Earth/

  • Cenozoic period

    It caused a mass extinction of dinosaurs.

  • Mesozoic

    When a time of new animals called the Reptiles started coming to Earth and dominate it.

  • Mesoproterozoic period

    When a geological record survived.

  • Archean period

    When the Earth crust layers and tectonics started forming.

  • Neoarchean period

    When a specific level of a rock section started forming

  • Mesoarchean period

    There were fossils forming in Australia. The Mesoarchean is a geologic era within the Archean, spanning 3,200 to 2,800 million years ago.

  • Phanerozoic era

    One abundant animal is evolving time by time.