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Ordovician Period - PowerPoint PPT Presentation


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Ordovician Period. 488-444 million years ago. 460 mya - Eurypterids Appear 450 mya – Chondrichthyes 444 mya – Mass extinction. 460 million years ago. Eurypterids Appear “Sea Scorpion” Largest arthropod to ever live (2 meters or 6 feet long) Predator of the sea.

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488 444 million years ago
488-444 million years ago
  • 460 mya- Eurypterids Appear
  • 450 mya – Chondrichthyes
  • 444 mya – Mass extinction
460 million years ago
460 million years ago

Eurypterids Appear

  • “Sea Scorpion”
  • Largest arthropod to ever live

(2 meters or 6 feet long)

  • Predator of the sea
450 million years ago
450 million years ago
  • Ostracoderms
  • Jawless Fish
  • Bony plated armor
  • Cartilage “skeleton”
444 million years ago
444 million years ago

Mass Extinction

marks the end of the

Ordovician most likely due to glaciation of Gondwana…

new organisms that appear
New Organisms that Appear
  • Cephalopods
  • Brachiopods
  • Crinoids
  • Ostracoderms
continents
Continents
  • Gondwana
  • Australia
  • Africa
  • Southern Europe
  • Antarctica
  • South America
  • Gondwanagradually moved toward the South Pole until it covered the pole at the end of the period. Most of Gondwana was covered by water during the Ordovician.
  • North America and EuropeNorth America, Western Europe and Northern Europe were located in the tropics. These land areas were sometimes covered with water and sometimes not.
picture it
Picture It
  • Were there terrestrial animals or plants?
  • What would the land have looked like?
  • Was all life found in the sea or marine environments?

THERE WAS NO LIFE ON LAND STILL!

Ordovician was the time where marine life diversified!