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Re: Why was Earth a fiery hell 55 million years ago?



There was a relatively small (9km crater) marine
impact (55+/- Ma)--Ragozinka--in what are now the Middle Urals in Russia,
which could have easily triggered a methane release.

Cool!

I'm also a fan of the idea of bolide impacts triggering volcanism elsewhere
on the globe, especially in the vicinity of their antipodes (e.g. Chicxulub
and the Deccan Traps).

No. The main episode of Deccan volcanism ended 100,000 years before the impact. Smaller episodes happened both earlier and later. Unless the impact had a time machine, it didn't cause any volcanism in India.


BTW...

Also as the the vapor condenses it extracts heat from the atmosphere.

The other way around: it gives off heat when it condenses.