Henry Geologic time line

Timeline created by HenryW.
  • 4,500 BCE

    Earth is born

    Earth is a ball of lava
  • 4,400 BCE

    The crust

    The magma cools and a crust begins to from
  • 4,000 BCE

    Water

    Asteroids deliver water to the earth and causing the rain for millions of years
  • 3,400 BCE

    Continents

    the Continents begin to form and grow for 1 billion years
  • 2,500 BCE

    Oxygen

    Single celled organism begin to produce oxygen
  • 1,500 BCE

    Blue Skies and Seas

    The iron in the ocean sinks and the sky becomes filled with oxygen
    Rodinia also forms
  • -541 BCE

    Cambrian

    Cambrian explosion. During this time earth had the most diverse species. Mostly Marine life
  • -485 BCE

    Ordovician

    Tectonic movement that caused huge changes in climate and biological systems.
  • -443 BCE

    Silurian

    During this time continental plates were low and sea levels had risen
  • -419 BCE

    Devonian

    Late in the period the first four-legged amphibians appeared, indicating the colonization of land by vertebrates.
  • -358 BCE

    Carboniferous

    During this period much of the landscape was filled with swamps, this is where we get much of our carbon from
  • -251 BCE

    Triassic

    The early dinosaurs roamed the supercontinent of Pangea, ended in a mass extinction on 85-90% of species
  • -201 BCE

    Jurassic

    Pangea had begun to separate and create Laurasia to the north, and Gondwana to the south
  • -65 BCE

    Tertiary

    An interval of enormous geologic, climatic, oceanographic, and biological change. The beginning of mammals being dominant
  • -3 BCE

    Quaternary

    Large glacial movements, during this time earth saw a large change in climate. Earliest humans form
  • Period:
    -298 BCE
    to
    -251 BCE

    Permian

    Ended with a mass extinction, about 90% of species died
  • Period:
    -145 BCE
    to
    -65 BCE

    Cretaceous

    The final time period for the dinosaurs, there was a diverse amount of species and some of the largest land animals lived during this period