There were two major pulses of extinction at the end of the Devonian Period around 360 million years ago. However, the cause or causes of these extinctions remain mysterious. It is thought that the spread of large land plants, such as trees, contributed to major climate change at this time, but there are also hypotheses regarding extraterrestrial causes, such as nearby supernovae, and volcanic causes. In this video, I go through the evidence behind each of these possible causes and what effect they would've had on the climate and biosphere of Earth.
References: Earth System History: amzn.to/3v1Iy0G
Supernova paper: doi.org/10.1073%2Fpnas.201377...
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0:00 1st Pulse of Devonian Mass Extinctions
1:29 2nd Pulse of Devonian Mass Extinctions
2:47 What Caused the Extinctions?
4:07 Killer Plants?
7:33 Extraterrestrial Cause?
8:54 Volcanic Cause?
9:44 Summary of Causes & Effects
10:56 Related videos & References
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Негізгі бет Ғылым және технология Late Devonian Mass Extinction Event ~360 Million Years Ago | GEO GIRL
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