GEOLOGY

Detailed explanation-1: -End Ordovician (444 million years ago; mya) Late Devonian (360 mya) End Permian (250 mya) End Triassic (200 mya) – many people mistake this as the event that killed off the dinosaurs. End Cretaceous (65 mya) – the event that killed off the dinosaurs. 30-Nov-2022

Detailed explanation-2: -These five mass extinctions include the Ordovician Mass Extinction, Devonian Mass Extinction, Permian Mass Extinction, Triassic-Jurassic Mass Extinction, and Cretaceous-Tertiary (or the K-T) Mass Extinction.

Detailed explanation-3: -Cretaceous Period-66 million years ago. Triassic Period-201 million years ago. Permian Period-252 million years ago. Devonian Period-359 million years ago.

Detailed explanation-4: -The planet has experienced five previous mass extinction events, the last one occurring 65.5 million years ago which wiped out the dinosaurs from existence. Experts now believe we’re in the midst of a sixth mass extinction.

Detailed explanation-5: -Permian-Triassic extinction-252 million years ago The cataclysm was the single worst event life on Earth has ever experienced. Over about 60, 000 years, 96 percent of all marine species and about three of every four species on land died out.