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Mass Extinctions - Coggle Diagram
Mass Extinctions
Ordovician:
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Extict species: its not that clear but around one hundred families were
extinguished that means around 85% earths fauna dissapear
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Devonian
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Reasons:Global cooling,loweing levels of carbon dioxide an possibly an
asteroid impact
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Permian
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Extinct species:90% of the surface on the earth was dead 7 out of 10 species in
the land extinct and 9 out of 10 marine species died
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