Re: Volcanoes (comments on pterosaur extinction)

["Emma C. Rainforth" <emmar@ldeo.columbia.edu>]

except, the iridium layer and all other impact-related features occur 
in the MIDDLE of the Deccan.....i.e. the Deccan traps were already 
erupting before the bolide hit.

BTW, the Triassic-Jurassic mass extinction PREdates the central 
Atlantic magmatic province (which is bigger than Deccan). So the 
volcanism can NOT have caused this extinction event.

Emma

Ken Kinman wrote:
>     I don't know much about geology, but it seems likely to me that 
> the bollide collision probably set off a lot of the volcanic 
> activity, and that this just added insult to injury and vulcanism 
> was of secondary importance overall.
--
Emma C. Rainforth
Geosciences Rm. 206E
Lamont-Doherty Earth Observatory
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Palisades
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ph. (845) 365-8621
fax (801) 838-4126
emmar@ldeo.columbia.edu