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From: William Hyde <wthyde1953@gmail.com>
Newsgroups: talk.origins
Subject: Re: The permian extinction 200 million years ago ice or fire?
Date: Tue, 5 Nov 2024 17:03:03 -0500
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RonO wrote:
> https://www.sciencedaily.com/releases/2024/10/241028164257.htms
> 
> 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.

Certainly sulphate aerosols act more rapidly than greenhouse gases.


Work on a site at the K/T border in Colorado shows first a shower of
small debris, then a cold period (frost damage evident in aquatic plants
gives an approximate time of year of July), followed by a slow prolonged
warming.

So Fire and Ice, not to mention wind and shock waves.

William Hyde