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Scientists unlock secrets of the Great Dying

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pallidin

Wow. I had no idea.

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fred_mc
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They determined that before the eruption, the lithosphere was filled with chlorine, bromine and iodine, but that after the eruption these elements seemed to have all but disappeared.

"We concluded that the large reservoir of halogens that was stored in the Siberian lithosphere was sent into the earth's atmosphere during the volcanic explosion, effectively destroying the ozone layer at the time and contributing to the mass extinction," said Broadley.

Yes, or perhaps there was an advanced civilization at the time who mined all the halogens, and had application areas for them that released them into the air. Not as likely as a volcano but a more interesting theory ;-) .

 

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paperdyer

Depending how much of these halogens were in the air, the civilization to support your theory wouldn't be human as we know it.

So the Earth lost its ozone layer, but it came back.  I wonder if the next study is going to determine how this happened.

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Setton
4 hours ago, fred_mc said:

Yes, or perhaps there was an advanced civilization at the time who mined all the halogens, and had application areas for them that released them into the air. Not as likely as a volcano but a more interesting theory ;-) .

 

Or a volcanic eruption. 

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Socks Junior
On 8/28/2018 at 11:34 AM, UM-Bot said:

A new study has determined how a volcanic eruption 205 million years ago wiped out 90 percent of all life on Earth.

https://www.unexplained-mysteries.com/news/320998/scientists-unlock-secrets-of-the-great-dying

The Permian ended 252 million years ago.

You could even say 251.902 ± 0.024 million years ago if you're feeling really sparky, like the International Commission on Stratigraphy.  They love putting "golden spikes" in.

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