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mass extinctions (triassic extinction (was not as vilet as others,…
mass extinctions
triassic extinction
was not as vilet as others
volcanic eruption
acid rain
global warming
a drop in sea levels
more than half of sea animals dead and all large amphibians
late Devonian area
happend over 30 million years and several factors contributed
global cooling
falls in sea leaves
oxygen depleted water welling up
permian extinction
the most severe extortion
95% of marine life extinct
70% of land spices extinct
this was caused by volcanic eruptions
cretaceous extols
the most recent and the best known
caused by astroyed with was in south america with killed anything 100 km around
it is believed that three courters of the spies this included dinosaurs
the end of the ordovician period
this was because of an ice age
this was the 2nd most devastating extinction on earth