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Re: oldest dino fossils location?

As far as I know, there are certain dinosaur remains coming from North
American Formations that have been considered as coeval with or even
older than the Ischigualastian. However, it is no sure from what I

2009/10/10 David Marjanovic <david.marjanovic@gmx.at>:
>>  At the current time, are the very oldest dinosaur fossils from South
>>  America?
> Yes.
>>  Does anyone expect older ones to be found elsewhere? (speculation, of
>>  course)
>>  Could S.A. be the radiating point from which they spread to the rest
>>  of the super-continent?
> This question is wrong. Being part of the supercontinent, SA didn't exist in
> a biogeographic sense (...nor, in fact, any other). Perhaps there was an
> ecosystem, a climatic zone, where the dinosaurs originated and from where
> they spread, but any such region would contain only parts of SA as well as
> parts of the neighboring continents.