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Re: "Lazarus" Dinosaurs in the Paleocene!!?



First, it would probably be best to continue calling them "Lazarus" dinosaurs, and not abbreviated as "Lazarosaurs". Otherwise it may generate confusion with the non-dinosaurian genus Lazarussaurus (which were primitive choristoderes or choristodere relatives).
As for Buckaroo's suggestion (below) that Paleocene dinosaur survivors might be "the end of the impact hypothesis", I don't think it would even begin to threaten he impact hypothesis unless we found that the great majority of dinosaur species continued into the early Paleocene (along with ammonites, etc.).
This does not appear to be the case at all. If there were dinosaur survivors of KT, it was probably just a few species whose eggs managed to hatch many months after the impact. Fassett himself suggests that all the adult dinosaurs probably died in the devastation caused by the impact, and I agree fully.
From the abstract, it appears that his talk tomorrow will deal with how long he thinks the Lazarus dinosaur species survived (some almost a million years in New Mexico?). Whether he will be discussing new evidence that the hadrosaur femur was not reworked remains to be seen. We might have to wait until early 2002 for that evidence.
He apparently has no grant money for this research, and works on it in his spare time (which must make progress on this research slow and difficult). I just hope he is right about "Lazarus" dinosaurs, and that his new evidence will be pretty convincing (although it won't be like having some articulated specimens).
By the way, does anyone know how close together the two "Paleocene" theropod vertebrae were found? I assume they were not found articulated.
-----Ken
********************************************
From: Buckaroobwana@aol.com
Date: Mon, 29 Oct 2001

Greetings,
If this hadrosaur femur turns out to be Paleocene, wouldn't it be the end of
the impact hypothesis for all intents and purposes? What are the thoughts of
the on-list professional paleontologists about this? Thanks, Brian Buck


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