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Re: [Re: K-T question]



   Well, what I want to know is the paleopopulation with the plantlife as
immediately before and after (and during) the K-T boundary. Could you also
explain the warming-cooling trends in the plant life too, and when exactly
they occur? 



                                                Thanks,
                                                Caleb






Phillip Bigelow <bh162@scn.org> wrote:
> 
> 
> On Thu, 1 Jun 2000, Stanley Friesen wrote:
> 
> > At 11:40 AM 6/1/00 -0600, Caleb wrote:
> > >Gang,
> > >
> > >    Out of curiosity, was the plant life near the K-T boundary dwindling
too?
> > >What was it doing before, at, and after the boundary? Also, just another
quick
> > >question, are there any known dinosaur specimens from the Middle East?
> > Tricky question.
> > 
> > The flora of the Lance and Hell Creek is decidedly less tropical in nature

> > than that of the underlying formations, and thus has a lower 
> > diversity.  There is also some evidence of a subtle change in the flora 
> > towards the top of the Hell Creek, though I do not remember the details.
> 
> 
> According to Kirk Johnson, the flora of the Hell Creek Fm shows evidence
> of a couple of cooling periods and a couple of warming periods.  As far as
> I know, the stratigraphic zones in which these flora/climate changes have
> been documented have not yet been corrolated with dinosaur taxonomic
> diversity (e.g., temporary declines/increases in diversity) or changes in
> dinosaur fossil numbers (which may or may not be associated with dinosaur
> paleopopulation changes within these particular zones).  It may not be
> do-able (some field project proposals look better in print than they do
> when actually attempted), but if it is possible to test, it could make a
> neat MS thesis project for someone! Maybe I should add it to my list of
> suggested projects, found at: 
> 
> http://www.scn.org/~bh162/suggested_research.html
>  
> 
> Although the following does not address Caleb's question, here is an
> abstract that Kirk Johnson wrote a couple years ago on the flora of the
> middle part of the Hell Creek Formation (BTW: break out the bongs, kids,
> 'cause the Hell Creek Fm. has some righteous weed!)
> 
> http://www.ou.edu/cas/botany-micro/bsa-abst/section8/abstracts/17.shtml
> 
> 
>                  <pb>
> --
> 
> 


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