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Re: extinction 2

> > - number 4. "Within a very short period of time (minutes, hours, 
> days,
> > weeks based on the distance) a large amount of fossils should have 
> been
> > produced in
> > high density. Where are these?"

> Anything that dies within minutes of an impact is, presumably, very 
> close to
> the point of impact.  Anything close to the point of impact would be 
> pretty
> much obliterated from a fossil formation point of view.

The following 2 classic papers are required reading for anyone pondering
why there is no "big K-T boundary bonebed", caused by all of the
dinosaurs (and other critters) suddenly keeling-over in their tracks:

Signor, P. W., and J. H. Lipps. 1982. Sampling bias, gradual extinction
patterns and catastrophes in the fossil record, p. 291-296, in Silver,
L.T., and P.H. Schultz (eds.). Geological implications of impacts of
large asteroids and comets on the Earth. Geological Society of America
Special Paper 190.

Williams, M. E. 1994. Catastrophic versus noncatastrophic extinction of
the dinosaurs: Testing, falsifiability, and the burdon of proof.  Journal
of Paleontology 68: 183-190.


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