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Re: Sauropod extinction


    Perhaps North America became more humid, or at least wetter than it had
been during the latter portion of the Jurassic, and, since we seem to see
sauropods in areas that were at least occasionally arid, this may have been
a poor environment for their continued success.

    We do know that North America was bisected by the inland sea, and that
water levels were much higher during the Cretaceous, especially in the
Northern Hemisphere.

    Just a guess.

P.S. (This is a dinosaurian aside).  Is the Docent program still ongoing at
the Academy, or is it in one of those weird flux-states that things sometime
get into at the Academy?


-----Original Message-----
From: Sherry Michael <MICHAELS@preit.com>
To: dinosaur@usc.edu <dinosaur@usc.edu>
Date: Saturday, July 25, 1998 4:33 AM
Subject: Sauropod extinction

Since I'm feeling chatty today, I'll start another sauropod thread:

What do you think happened to the sauropods at the end of the Jurassic? I
think it is very intriguing that N.A. species got hammered, but many
sauropods thrived until the late Cretaceous in other places (such as South
America). What happened in N.A. that didn't occur in places such as S.A.?

-Sherry Michael