Geological Timescales

• How old is the Earth?

  Aprox. 4.6 billion years old
• Geological Time Periods Are:

  Pre-Cambrien

  Cambrien

  Ordovician

  Silurian

  Devonian

  Carboniferous

  Permian

  Triassic

  Jurassic

  Cretaceous

  Paleogene

  Neogene

  Quaternary
• What Periods Cover the Paleozoic?


  Cambrien, Ordovician, Silurian, Devonian, Carboniferous, Permian
• What Periods cover the Mesozoic? 


  Triassic, Jurassic, Cretaceous
• What Periods cover the Cenozoic? 


  Paleogene, Neogene, Quaternary