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RE: youngest dino-remains
On Saturday, March 20, 1999 6:16 PM, Stanley Friesen
> Not at all. The extinction was still one of Big Five, and outside of the
> avian clade, it wiped out all dinosaurs. A causal explanation for this is
> indeed very interesting, even *with* the survival of *one* clade of
> As to the post-Cretaceous teeth, there are numerous such above the Hell
> Creek in Montana, mostly theropod and ceratopsian. (Which is as expected
> for redeposited teeth).
Nor would post-KT dinosaurs disprove the Alvarez scenario, even if found.
Since this is a repeat of a discussion we had not so long ago, I'll simply add
that the impact could have killed by immediate physical effects, or much
longer-term ecological effects, or any combination of both.