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Rodents gnawing dino bones



1
The late Cretaceous bone beds in Dinosaur P rovincial Park,
Alberta, Canada contain far more mammalian teeth than dino remains.
That's in terms of numbers, not mass.  All these teeth are adapted
for insectivory, and the best guess is that they represent the 
remains of Insectivora, the only extant order of mammals that
originated before the Tertiary.  Insectivore teeth are not a dapted
for gnawing any hard material, though no doubt their possessors
could cruch up a tiny vertebrate just as easily as a beetle.
So far as recall the Rodentia do not occur earlier than the late
Eocene.

To e xpect to find dino bones gnawed by rodents is thus almost as
unlikely as finding a stone spear point  in a dino skeleton.  Dinos
and rodents just did not co-exist.

David

--
>From: David Brez Carlisle
bk090@Freenet Carleton.CA