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End Ordovician
444 MYA- The geological activity at the end of the Ordovician period, roughly 443.8 million years ago, was characterized by the Late Ordovician mass extinction -
Late Devonian
360 MYA- The Late Devonian saw significant geological activity, including tectonic shifts, volcanic eruptions, and a major mass extinction event. Continental plates were moving and colliding, leading to mountain building -
End Permian
250 MYA- The End-Permian geological activity, specifically the Permian-Triassic extinction event, involved a massive and sudden decline in biodiversity on Earth, primarily due to volcanic activity associated with the Siberian Traps. -
End Triassic
200 MYA- The End-Triassic extinction event, occurring about 201.5 million years ago, was characterized by significant geological activity, including widespread volcanic eruptions and the breakup of the supercontinent Pangea -
End Cretaceous
65 MYA- The Cretaceous Period ended approximately 66 million years ago with a mass extinction event, likely triggered by a major asteroid impact.