History of the Earth

By Samuu_33
  • Period: 4598 BCE to 540 BCE

    Precambrian

    Guide fossil: Estromatolites.
    Geological events: geologic activity, oceans, Rodinia, Pannotia.
    Climate events: Global glaciation, oxidizing atmosphere, ozone layer.
  • First form unicelular life
    3800 BCE

    First form unicelular life

    Bacterias was the first unicelular life form.
  • Cyanobacteria appears
    2500 BCE

    Cyanobacteria appears

    Cyanobacterias was the first life form that perform the photosynthesis, this life form, helped to transform the atmosfere.
  • Invertebrates appers
    600 BCE

    Invertebrates appers

    First pluricelular life forms like sponges, jellyfishes or corals appears.
  • Period: 540 BCE to 250 BCE

    Paleozoic

    Guid fossil: Trilobites.
    Geological events: Big mountain ranges, geologic activity, Pangea
    Climate events: Global glaciations.
  • Arthropods and cephalopods
    539 BCE

    Arthropods and cephalopods

    First arthropods and cephalopods appears in Cambrian period.
  • First vertebrates
    500 BCE

    First vertebrates

    First vertebrates apears in Ordovician period.
  • First plants
    490 BCE

    First plants

    First plants appears in Ordovician period, but this plants appears in the ocean.
  • First mass extinction
    438 BCE

    First mass extinction

    First mass extinction was at the end of Ordovician period.
  • First fishes with jaws
    435 BCE

    First fishes with jaws

    Startin the silurian period, the first fishes with jaws apears.
  • Colonization of mainland
    420 BCE

    Colonization of mainland

    First plants and arthropods colonization mainland at Silurian period.
  • Fish age
    400 BCE

    Fish age

    Fish age was during the Devonian period.
  • First insects
    380 BCE

    First insects

    First insects apears during the Devonian period,evolving from different arthropods.
  • Second mass extiction
    360 BCE

    Second mass extiction

    The second mass extiction was at the end of Devonian period.
  • Forest age
    359 BCE

    Forest age

    Finish the Devonian period and started the Carbonisferous period, was the forest age.
  • Amphibian age
    340 BCE

    Amphibian age

    Amphibian age was in Carboniferous period, evolving from some fish and dominating the land.
  • Sauropsids and synapsids
    290 BCE

    Sauropsids and synapsids

    Sauropsids and synapsids are two bigs evolutions of amniotes.
  • Third mass extiction
    255 BCE

    Third mass extiction

    This mass extiction was the biggest, because around the 90% of species became extinct.
  • Period: 250 BCE to 66 BCE

    Mesozoic

    Guide fossil: Ammonites
    Geological events: Pangea fractures, meteorite impact, geologic activity, more oceans.
    Climate events: A warm period begins.
  • First dinosaurus
    245 BCE

    First dinosaurus

    The first dinosaurus was starting the Mesizoic era.
  • Reptiles age
    240 BCE

    Reptiles age

    In the Triassic period, the reptiles dominate the land.
  • First mammals
    225 BCE

    First mammals

    The first mammals appears in the Triassic period, evolving from synapsid reptiles.
  • First birds
    160 BCE

    First birds

    First birds apears in the Jurassic period.
  • Plants with flowers
    150 BCE

    Plants with flowers

    The first plants with flowers appears at the end of Triassic period and starting the Cretaceous period.
  • Fourth mass extiction
    145 BCE

    Fourth mass extiction

    Fourth mass extiction was at the Jurassic period.
  • Different dinosaurus appears
    100 BCE

    Different dinosaurus appears

    Different dinosaurus like Tyrannosaurus, Mosasaurus, Titanosaurus, appears in Cretaceous era.
  • Fifth mass extiction
    67 BCE

    Fifth mass extiction

    The fifth mass extiction was in Cretaceous period.
  • Period: 66 BCE to 1 CE

    Cenozoic

    Guide fossil: Nummulites
    Geological events: Actual continents, mountain ranges.
    Climate events: Warmer weather and four global glaciations.
  • First primates
    60 BCE

    First primates

    The first primates appears at the Paleogene period.
  • Mammals age
    50 BCE

    Mammals age

    In the Pleogene period, the mammals predominated over the othes species.
  • Mammoths and megalodons
    20 BCE

    Mammoths and megalodons

    Differents mammals or animals that prenominated the Neogene period appears, like mammoths and megalodons.
  • Homo sapiens
    2 BCE

    Homo sapiens

    The Homo sapiens appears during the Quaternary period, evolving from different primates.