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Unusual-Diver-8335 t1_j6pc97z wrote

>two thirds of marine species went extinct

over the course of ~1,000 years

Contrarily, planktonic foraminifera diversified, and dinoflagellates bloomed. Success was also enjoyed by the mammals, who radiated extensively around this time.

https://en.wikipedia.org/wiki/Paleocene%E2%80%93Eocene_Thermal_Maximum

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