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Re: Hell Creek and stegosaurs




On Mon, 3 Jun 2002, David Marjanovic wrote:

> When exactly? Could I maybe blame the little
> Aptian-Albian mass extinction? Or the Cenomanian-Turonian one (would imply
> some ghost lineage)? :-) -- With the few known stegosaurs it's of course
> rather improbable that we'll find out anytime soon why they died out before
> the K-T, and when.

"The little...mass extinction." ??  When is a mass extinction not a mass
extinction?