Re: The permian extinction 200 million years ago ice or fire?

On 11/5/24 10:23 AM, RonO wrote:

On 11/5/2024 11:59 AM, John Harshman wrote:

On 11/5/24 9:39 AM, RonO wrote:

https://www.sciencedaily.com/releases/2024/10/241028164257.htms
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These researchers think that the cold periods after the massive volcanic eruptions cause the mass extinction 200 million years ago. Massive amounts of carbon dioxide were expelled into the atmosphere, but they think that the huge amounts of sulfates caused rapid cooling more than once during these massive eruptions and that it was the cold that life on earth could not survive.
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Maybe the dinos were warm blooded even then and took over after the mass extinction event.

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Nope. There were no dinosaurs in the Permian, and the first dinosaurs appear more than 20 million years after the extinction. And even then they were fairly rare members of the fauna they were part of, so couldn't be considered to have taken over.
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 The article didn't call it the Permian extinction I messed up.  The dinos did survive the extinction event 200 million years ago that the article was talking about.

Ah, I missed the bit about 200 million years ago. That would be the end-Triassic extinctiion, a much smaller one, and dinosaurs did come to dominate the charismatic megafauna after that.