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Re: "Meteor theory gets rocky ride from dinosaur expert"

If the southern end of the seaway was closed, is there any evidence of
hypersalinity in the latest Maastrictian seaway?  Reason I ask is because
most workers believe that the northern end of the seaway was already
closed off (the northern strand line is believed to have been located
somewhere around southern North Dakota).

Restricted marine basins that lack global circulation usually possess a
*very* distinctive fauna (and for that matter, flora). 


On Fri, 27 May 2005 03:45:57 -0700 (PDT) Tim Donovan <uwrk2@yahoo.com>
> > > It is likely that the shallow shelf across the
> > southern WIS would 
> > > also have 
> > > caused the wave to break, thereby ameliorating its
> > impact in the 
> > > northern 
> > > WIS
>   Lehman wrote that the southern end was closed by
> middle Maastrichtian time, and mentioned an incipient
> Cannonball Sea. Btw, wouldn't a tsunami have wiped out
> the ejecta layer if it struck immediately afterwards?
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