Cover page

-Geologic Time-

By kaitlynnowak
  • Period: to

    Precambrian Time

    precambrian time by lynette okenica
  • First crustal rocks form.

    First crustal rocks form.

  • Earth's surface is cool enough for liquid water

    Earth's surface is cool enough for liquid water

  • First known unicellular life appears

  • Earth'satmosphere starts to become oxygen rich

  • First known multicellular life appears

  • First fungi appears

  • First sheltered organisms, such as arthropods and mollusks, appear

  • Period: to

    Paleozoic Era

    the geologic era that followed Precambrian time and that lasted from 542 million to 251 million years ago.
  • First possible Vertebrates appear

    First possible Vertebrates appear

  • Modern, oxygen-rich atmosphere has formed

    Modern, oxygen-rich atmosphere has formed

  • First land plants appear

    First land plants appear

  • First amphilbians appear

    First amphilbians appear

  • First reptiles appear

  • Formation of pangea is complete

  • Permain mass extinction results from major enviroment changes

  • Period: to

    The Mesozoic Era

    the geologic era that lasted from 251 million to 65.5 million years ago; also called the Age of Reptiles
  • Pangaea begins to break apart

    Pangaea begins to break apart

  • First mammals appear

    First mammals appear

  • First primitive birds appear

    First primitive birds appear

  • First flowering plants (angiosperms) appear

    First flowering plants (angiosperms) appear

  • First modern birds appear

    First modern birds appear

  • The last disnosaurs become exinict Catastrophic meteorite impact occurs

  • Period: to

    The Cenozoic Era

    The cenozoic era by lilshan88
  • Most modern mammal familes, including whales, carnivores, hooved animals, and primates have appeared

    Most modern mammal familes, including whales, carnivores, hooved animals, and primates have appeared

  • First grasses appear

    First grasses appear

  • India colides with Asia, and Anartica drifts over south pole

    India colides with Asia, and Anartica drifts over south pole

  • First hominids (early human ancestors) appear

    First hominids (early human ancestors) appear

  • Modern Ice Age appears

    Modern Ice Age appears

  • Modern humans appear

    Modern humans appear