The history of the Earth

  • Period: 541 BCE to 252 BCE


    -Guide fossil:Trilobites (arthropods).
    -Geological event: Big explosion of life.
    -Climate event: Greenhouse effect, great volcanic activity and formation of the super continent Pangeas.
  • Period: 252 BCE to 66 BCE


    -Guide fossil: ammonites (cephalopod mollusk).
    -Geological event: The Atlantic Ocean originates and the continents begin to separate.
    -Climate event: There are no glaciations due to the warm climate.
  • Period: 66 to