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Re: Study Finds that a Single Impact Killed the Dinosaurs

> Or else the geochemistry was changed by the impact
> itself (e.g. acid 
> rain) resulting in a reduction in the liklihood of
> preservation as you 
> get closer to the K/T boundary.  Not saying it's
> right, but you have to 
> control for confounding factors before it's positive
> evidence.

There is a paper (GSA Bulletin 116:760, "Survival in
the first hours of the Cenozoic") which although very
general when it comes to taxa, reviews the evidence of
the physical consequences of the impact. Though it
mainly deals with the IR pulse, it is a good start to
locate some papers on these issues in general.


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