Reply to k-t

[Peter Sheehan <sheehan@csd4.csd.uwm.edu>]

Nautiloids may have gotten through with a yolky egg--See Gallagher,
Geology 1991 p. 967-970--with several more examples.  Other low 
metabolism groups made it See  Rhodes and Thayer, Geology 1991, p. 877-880.
Members of stream communities may have been detritus buffered )(Geology 
1986. p 868-870 & Geology 1992, p. 556-560).  As I have said before, we
are talking at each other and rehashing old ideas that we choose or do 
not choose to believe.

As to correlation, although the impact layer is only occasionally preserved
in Montana and North Dakota it is one of the best time markers known
in geology, allowing a precise tie to many sections around the world.

Personally, I see good documentation of most groups of marine animals and
at least suggestive evidence for terrestrial animals that there was no
gradual decline in the last few million years of the Cretaceous.  Others
will disagree.  

I make the point again.  We are setting up valid tests.  But each side 
ignores the other.  As Kuhn has pointed out--it takes a long time for the 
dust to settle in this kind of scientific debate.  (Although it only took 
months at the k-t boundary.)

Peter Sheehan