Zgimbau Geologic Timeline

Timeline created by AnamariaZ
  • 4,500 BCE

    Creation of Earth

    Creation of Earth
    The Earth was molten
  • 4,400 BCE

    Water on the Earth

    Water on the Earth
    Meteors fell on the planet where water was formed. Water came from the asteroids.
  • 4,000 BCE

    Granite

    Granite
    Water on the Earth condensed and it rained for millions of years. Undersea volcanic activity formed granite which later formed the continents.
  • 2,500 BCE

    The Continents

    The Continents
    The continents were formed. Single-celled life forms appeared. Stromatolites produce oxygen. Algae make photosynthesis.
  • 1,500 BCE

    Blue water

    Blue water
    Oxygen rusted the iron. Oxygenation made the oceans and the skies blue. Fresh-water creatures appeared. Oceanic plates moved the continents
  • 1,000 BCE

    Rodinia

    Rodinia
    The continents collided and created a super-continent (Rodinia). The Earth was mostly desert and there was no life.
  • -700 BCE

    Ice

    Ice
    Rodinia blocked warm currents. The Earth froze. Marine bacteria and algaes were trapped underneath ice and 95% of the species died.
  • -650 BCE

    Break of Rodinia

    Break of Rodinia
    Volcanic eruptions broke Rodinia apart.
  • -630 BCE

    Greenhouse effect

    Greenhouse effect
    The greenhouse effect melted the ice.
  • -550 BCE

    Cambrian Period

    Cambrian Period
    There was no more ice. Primitive organisms became complex. The Cambrian explosion happened. The first carnivorous animals appeared. Oxygen reached high levels and created an ozone layer in the atmosphere protecting life from UV rays
  • -485 BCE

    Ordovician period

    Ordovician period
    The Ordovician is best known for its diverse marine invertebrates, including graptolites, trilobites, brachiopods, and the conodonts During the Ordovician, most of the world's land was collected together in the super-continent Gondwana. Throughout the Ordovician, Gondwana moved towards the South Pole where it finally came to rest by the end of the period.
  • -443 BCE

    Silurian period

    Silurian period
    The three northern continents collided, forming the new supercontinent, Euramerica. The dominating species were marine species (corals,Agnatha, Romudina, Placoderm).Eurypterids were the apex predators of the Silurian oceans.
  • -419 BCE

    Devonian Period

    Devonian Period
    The supercontinent Gondwana occupied most of the Southern Hemisphere, although it began significant northerly drift during the Devonian Period.Placoderms (the armored fishes) underwent wide diversification and became the dominant marine predators. Lycophytes, horsetails and ferns grew to large sizes and formed Earth’s first forests. Arthropod fossils are concurrent with the earliest plant fossils of the Silurian.
  • -350 BCE

    Carboniferous

    Carboniferous
    The Earth was mostly covered in swamps. Coal formed from plant matter because of fresh water. Oil and gas resulted from dead marine animals. First enormous insects, amphibians, reptilians appeared. This period is characterized by the first complete modern biosphere.
  • -251 BCE

    Triassic Period

    Triassic Period
    Pangaea was formed. First dinosaurs appeared. Although many people, think that they were cold-blooded, scientists have proved that their blood was lukewarm. In combination with big quantities of oxygen and carbon dioxyde, this caused them to grow to enormous sizes.
  • -250 BCE

    Permian period

    Permian period
    In Siberia mantle eruptions took place for a million years. They formed poisonous gases and 95% of species died.
  • -180 BCE

    Jurassic Period

    Jurassic Period
    Continents moved away. Earth was mostly covered in tropical forests.
  • -145 BCE

    Cretaceous period

    Cretaceous period
    It was characterized by enormous volcanic eruptions. Diamonds were formed. It ended 65 million years ago with the K-T extinction. 65% of all species disappeared. Iridium was found which proves the extinction was caused by an enormous meteor. Also, the lava resulted from volcanic eruptions form toxic dust that killed the dinosaurs.
  • -65 BCE

    Tertiary Period

    Tertiary Period
    The Swiss Alps were formed by the collision between Africa and Europe. Erosion and uplift took place. The Grand Canyon was formed. Quartz appeared.
  • 2

    Quaternary period

    Quaternary period
    The first ancestors of humans appeared. It was the period of the Ice Ages. The ice melted 10 thousand years ago and formed the Great Lakes