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Five mass extinctions on the Earth, Sources: http://tauja.ujaen…
Five mass extinctions on the Earth
Ordovician
440-450 million years ago
disappearance of a third of all brachiopods and bryozoan families, as well as numerous groups of conodonts, trilobites, and graptolites.
The world cool and that started to froze the sea, causes the lowering of the sea levels
Triassic
251-199 million years ago
Archosaurs, pterosaurs, crocodiles and a lot of dinosaurs
gradual climate changes, asteroid impact, volcanic eruptions and global cooling.
Cretaceous
145-66 million years ago
dinosaurs, pterosaurs, pliosaurs, and ammonites
The impact of an asteroid
Devonian
416-359 million years ago
the carpoids, cystoidsrombiferous, three families of blastoids, the family Scutellidae became extinct, also the trilobites and eight families of Givetiensede trilobites were lost.
Global cooling, reduction in the levels of carbon due to forestation and an asteroid impact.
Permian
299-251 million years ago
trilobites, giant amphibians, most mammalian reptiles.
Intense volcanism, poisoning of the seas and the atmosphere, and a collision with one or more asteroids
Sources:
http://tauja.ujaen.es/bitstream/10953.1/574/1/TFG_PradosT%C3%A9llez%2CCecilia.pdf
, the image you sent us
