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Mass Extinctions on Earth - Coggle Diagram
Mass Extinctions on Earth
Ordovician:
440 to 450 million years ago
Extinct species: All complex organisms lived in the sea and close to one hundred biological families were extinguished
Global cooling and lowering of the sea levels are the main causes of extinction.
Devonian
416 to 359 million years ago
It hits more to the marine creatures
Causes: global cooling, reduction on the levels of carbon dioxide due to forestation of the continents, and possibly an asteroid impact
Triassic
251 to 199 million years ago
Species: Dinosaurs, terrestrial and marine creatures
Causes: gradual climate changes, an asteroid impact, volcanic eruptions, global cooling
Cretaceous
Extinct Species: dinosaurs were the most affected in this period.
Causes: Impact of an asteroid.
145 to 66 million years ago
Permian
Extinct Species:90% of all species died, 7 out of 10 terrestrial species and more than 9 out of 10 marine species.
Causes: intense volcanism, poisoning of the seas and the atmosphere, or possibly a collision with one or more asteroids
299 to 251 million years ago
Name: Ariana Espinosa
