Earth Geological Time Periods

  • Hadean/Pre-Archean Eon      4.6 BYA

    Hadean/Pre-Archean Eon 4.6 BYA

    There was no atmosphere yet so you could not breath, earth right then would have been forming its plates. Earth was still cooling off.
  • Archeon Eon       3.8 bya

    Archeon Eon 3.8 bya

    1st. The earliest forms of life were forming and called stromatolites
    2nd. you still couldn't breath.
  • The Proterozoic Eon           2.5 bya

    The Proterozoic Eon 2.5 bya

    stromatolites diverity increases then population declines
    herbivores begin to increase.
    herbivores increase because they feed on the stromalites.
  • Phanerozoic      542 mya

    Phanerozoic 542 mya

    niches were available now
    plants were now able to create photosynethis thus creating oxygen for further life
  • Paleozoic era          570 mya

    Paleozoic era 570 mya

    the paleozoic era was when the most important forms of life were formed. Multicelled animals undergoes an explosion of diversity.
    At the end a mass extinction wipes out 90% of marine animals.
  • Cambrian      570 mya

    Cambrian 570 mya

    many of the major species were in this period like hard shelled or plated marine animals.
  • Ordovician       500 mya

    Ordovician 500 mya

    red and green algea, primitive fish,cephalopods, and other marine inveretabrates are indigeonous.
  • Silurian      400-430 mya

    Silurian 400-430 mya

    thsi period experienced the stabilization of earths climate.
    a huge diversity of fish occurs including jawless fish. The first fresh water fish began to occur.
  • Devonian   395 mya

    Devonian 395 mya

    The first vascular plants occured in this period leading up to todays vascular plants. The first tetrapods or land living vertabres were one of the 2 major groups to clonize the land. Anthropods were also one of the major groups to colonize land. Marine animals diversified into plants like crinoids.
  • Carboniferous    345 mya

    Carboniferous 345 mya

    This period was the time when the largest amount of coal deposites were formed into todays modern world. Another great innavation occured in that time, THE EGG. This allowed tetrapods to not fear of desiccation.
  • Permian    280 mya

    Permian 280 mya

    This was the end for two things, the paleozoic and life then itself.
    This affected all of the organizms both marine and terrastrial.
  • Mesozoic era     225 mya

    Mesozoic era 225 mya

    This era was when flora and fauna changed dramaticly. The dinosaurs and the birds also became more and more diverse.
  • Triassic     225 mya

    Triassic 225 mya

    It started approximetly 225 million years ago it was the time that the world continent pangaea existed which altered global climate and ocean circulation. Triassic also follows to the largest extinction event in history. The orginisms of the Triassic were listed in 3 groups the hold overs the new groups that existed briefly and new groups like the dinosaures that went and counquered the mesazoic era.
  • Jurassic period    190-195 mya

    Jurassic period 190-195 mya

    large reptilian herbivores fed on lush ferns and palm like cycades small but carnivorous dinosaurs hunted the plant eaters.
    The jurassic period was named for the Jura mountains.
  • Cretaceous period     136 mya

    Cretaceous period 136 mya

    many insect groups or species,modern mammals, birds, and the first flowering plants were thriving in this period
    the breakup of pangea increased diversity in animals living in the north and south continents.
    no mass extinction or burst in diversity occured
  • Cenizoic era    65 mya

    Cenizoic era 65 mya

    The Cenezoic era took place 65 million years ago they sometimes call it age of the mammals because the largest land animals have been mammals at that time. The Cenezoic era split into 3 periods the Paleogene the Neogene and the Quaternary.
  • Tertiary period   65 mya

    Tertiary period 65 mya

    The tertiary period started 65 million years ago it was the major start of the mammals and was the start of the cooling of the global tempratures. It also lead to the current configuration of the continents.
  • Paleocene era    65 mya

    Paleocene era 65 mya

    Started approximetly 65 million years ago after most reptiles/ dinosaures where wiped off the face of the earth. And they were all mostly filled in with little mammals,and large flightless birds which mostly became predators.
  • Eocene era     59 mya

    Eocene era 59 mya

    it started approximately 59 million years ago. it has extremely hot and humid climate with green house conditions. Fossils would be mammals, primates, elephants, whales, and birds.
  • Oligocene era     38 mya

    Oligocene era 38 mya

    It started approximately 38 million years ago mammals continue to flourish and grow larger apes start to appear and the first elephants with trunks start to appear. And also climate is warm but starts to cool.
  • Miocene era   26 mya

    Miocene era 26 mya

    Started approximately 26 million years ago. The Mediteranian sea dries up and almost all modern mammal and bird families start to appear and are present. Modern carnivores start appearing and humenoid apes flourish and start to diversify.
  • Pliocene era   12 mya

    Pliocene era 12 mya

    Started approximately 12 million years ago. Big Gibraltar waterfall fills up the Mediterranean sea the climate stays cool and it is dry and seasonal. Fossils found would be modern plants and animals, grasslands and the first hominids appear.
  • quaternary

    quaternary

    This period was divided into 2 pleistocene and the holocene. Glaciations were formed in this small period, this period also included the earliest people in which they eventually evolved.
  • Pliestocene era    3 mya

    Pliestocene era 3 mya

    It started approximately 3 million years ago. The climate there was cold and dry world wide. Neandrathals dissapear and modern humans appear and large mammals thrive.
  • Holocene epoche  10000 years ago

    Holocene epoche 10000 years ago

    The holocene epoch was the closest to our modern era. The first people were now indigenous on our planet. The glaciation process was soon followed after this.