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Re: late night thoughts: adults only

----- Original Message ----- From: "don ohmes" <d_ohmes@yahoo.com>
Subject: Re: late night thoughts: adults only

Still, I had thought that the overlap between T. rex and sauropods in N. America was minimal and early, not zero.

Indeed it wasn't zero. "*Alamosaurus*" persisted all the way to The End, just as *T.* did.

Not that my assessment of the physical vulnerability of sauropods is affected, or my perception of the stealth-through-immobility options/capabilities of T.rex and functional equivalents (notably including allosaurids).

In that case the sauropods should have died out in the Late Jurassic at the latest...

Nor was I aware that the difference in last appearance times of sauropods in Asia/North America was so dramatic and clearcut.

It isn't. I talked about the North American "sauropod gap" (which may be an artifact of preservation). In North America, there's "*Alamosaurus*" from the late Campanian all the way to the end of the Maastrichtian; in Asia there are sauropods all the way to the Djadokhta Formation, which is usually considered early Maastrichtian in age -- there is no late Maastrichtian in northern and central Asia.