Geologic time scale prt.2

• The Paleozoic Era is divided into six periods, with the Cambrian Period being the first.
• Sulirian period- 430 mya-400 mya
• Cambrian period- 600 mya
• Ordovician- 435 mya
• Devonian- 400 mya
• Carboniferous- 360 mya
• Permian period- 360 mya
• Palezoic means "Age of the ancient life"
• Mesozoic- age of reptiles (middle life)

  Periods:

  Triassic Period

  Jurassic Period

  Crateceous Period
• Era:

  Pre-cambrian

  Palezoic

  Mesozoic

  Cenozoic
• Pre- cambrian

  * 5 bya- 600 mya

  * fungi, sponges, algae
• Age of invertebrates

  Sulirian Period

  Ordovician Period

  Cambrian Period (trilobites)
• Age of Fishes

  Devonian period
• Age of Amphebians

  Permian

  Carboniferous period
• Cenozoic

  " Age of recent life"

  • Beginning from tertiary period
  • Cenozoic "new life"
• Cenozoic

  Tertiary period- 65 mya (herbs, modern mammals, birds)

  Quaternary period - 1 mya (dominant humans)
• Eon- 0.5 bya or more

  Era- several hundred million years

  Period- tens of hundred million years

  Epoch- tens of millions of years