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Re: Dinosaur ecology: hermetically sealed?
In a message dated 4/13/00 10:43:53 PM Eastern Daylight Time,
> I'm not sure this addresses my point regarding an actual mechanism, viz,
> if there were prey available, how come they starved to death? However, I
> do agree there were likely many causative factors.
> I was talking about terrestrial species only. And I'm not arguing that a
> bolide didn't hit and didn't have global effects. I just don't think it
> does a good job--by itself, at least--of explaining dinosaur extinction.
> I don't know about marine species.
One of the talks at the Florida symposium was by Gregory Retallack
"End Cretaceous Acid Rain as a Selective Extinction Mechanism Between
Birds and Dinosaurs." He proposed that acid rain as a result of the
bolide impact caused pH levels to change dramatically, causing brown
vegetation for at least a year. Survivors of the K/T boundary were small,
could eat trash (insects, carcasses, mollusks), and/or could burrow in
the soil. Dr. Retallack himself said that this research is controversial,