Paleozoic Era

  • Jan 1, 1111

    Beginning of Paleozoic Era

    Beginning of Paleozoic Era
    The Paleozoic Era began 542 million years ago.
  • Jan 1, 1112

    Beginning of the Cambrain period

    Beginning of the Cambrain period
    The Cambrian peroiod of the Paleozoic Era spanned from 542 million years ago to 488 million years ago.
  • Jan 2, 1112

    Cambrian Period

    Cambrian Period
    *Global supercontinent, Pannotia, was in the process of breaking up.
    *Earth was generally cold.
    *Animal life was aquatic. First invertebrates appear.
  • Jan 1, 1113

    Beginning of the Ordovician period

    Beginning of the Ordovician period
    The Ordovivian period spanned from 488 million years ago to 444 million years ago.
  • Jan 2, 1113

    Ordovician period

    Ordovician period
    *Sea levels were high.
    *Earth started out very hot, but towards the end of the period, cooled off closer to today's temps.
    *Life flourished at first, and then mass-extinction events began to occur. First vertebrates (fishes) appear
  • Jan 1, 1114

    Beginning of Silurian period

    Beginning of Silurian period
    The Silurian period spanned from 444 million years ago to 416 million years ago.
  • Jan 2, 1114

    Silurian period

    Silurian period
    *Supercontinent Gondwana covered the equator and much of the southern hemisphere, a large ocean occupied most of the northern half of the globe.
    *Earth was in long warm greenhouse phase.
    *First macrofossils seen. First land plants and animals appear.
  • Jan 2, 1115

    Beginning of Devonian period

    Beginning of Devonian period
    The Devonian period spanned from 416 million years ago to 359 million years ago.
  • Jan 2, 1115

    Devonian period

    Devonian period
    *Period of great tectonic activity.
    *Exceptionally warm and probably lacked glaciers.
    *Primitive anthropods co-evolved. Age of fishes. First amphibians appear.
  • Jan 1, 1116

    Beginning of Carboniferous period

    Beginning of Carboniferous period
    The Carboniferous period spanned from 359 million years ago to 299 million years ago.
  • Jan 2, 1116

    Carboniferous period

    Carboniferous period
    *High sea levels.
    *Warm in the beginning and then cooled.
    *Lots of fish. Forrest and swamps cover the land. Giant cockroaches and dragonflies appear. First reptiles.
  • Jan 1, 1117

    Beginning of the Permian period

    Beginning of the Permian period
    The Permian period spanned from 299 million years ago to 251 million years ago.
  • Jan 2, 1117

    Permian period

    Permian period
    *Pangea formed.
    *Varied climate.
    *Mass extincion events.
  • Jan 1, 1118

    End of the Paleozoic era