HISTORY OF EARTH (EXTINCTION)

• Percentage of Mass Extinction of Ordovician - Silurian

  85%
• Percentage of Mass Extinction of Late Devonian

  75%
• The extinction event that occurred during the late Paleozoic Era is known as the "Great Dying" or the "Permian-Triassic mass extinction." It was one of the most severe extinctions, with an estimated loss of up to 90% of all marine species.
• Percentage of mass Extinction of Permian-Triassic

  96%
• Percentage of mass extinction of Triassic -Jurassic

  80%
• Percentage of mass extinctions in Cretaceous -Paleogene

  76%
• Happened 444 MYA

  Ordovician-Silurian
• Major pulse happened 374-359 MYA

  Late Devonian Extinction
• Happened 66 MYA

  Cretaceous - Paleogene
• Happened 201 MYA due to increased volcanic activity

  Triassic - Jurassic
• Happened 252 MYA

  Permian-Triassic
• Hirnantian Glaciation and Anoxic Oceans (No Oxygen)

  Ordovician-Silurian
• Ordovician-Silurian Extinction happened

  444 MYA
• Late Devonian Extinction happened

  374 - 359 MYA
• Permian-Triassic Extinction happened

  252 MYA
• Triassic-Jurassic Extinction happened

  201 MYA
• Cretaceous-Paleogene Extinction happened

  66 MYA
• The Permian extinction was the largest mass extinction event in Earth's history.
• Caused Global Warming and Acid Rains

  Permian- Triassic
• Bolide impact

  Cretaceous -Paleogene
• Most catastrophic extinction pulse

  Hangenberg Event
• Ammonites perished

  Frasnes Event
• Affected the evolution of fishes and other aquatic organisms.

  Late Devonian
• Fransnes Event

  Kellwasser Event

  Hangenberg Event

  Late Devonian
• Abundance of toxic Metals under Ordovician-Silurian 


  Mercury
• Gephuroceratide and Beloceratide perished

  Kellwasser Event
• Multiple volcanic Eruption

  Permian-Triassic
• Causes of Frasnes Event

  Climate change

  Eutrophication

  Ocean Convection
• Sea level fluctuations and Anti Greenhouse effect

  Kellwasser Event
• High atmospheric oxygen content makes the climate colder

  Ordovician-Silurian
• Lethal mutations in aquatic organisms

  Ordovician-Silurian
• Ocean anoxia indirectly

  Hangenberg Event
• Intense thermal radiation, earthquake, volcanic Eruption, rian of fireballs, tsunami, deep darkness and drop Earth temperature 


  Cretaceous -Paleogene