Re: Age of Gobi formations

["Dino Sniffer" <dinosniffer@hotmail.com>]

Not to get too off track, but since Jaime keeps bringing geology into these 
discussions, we might as well get it right, right?  First off, there is no 
such word as "inconformity" as was used by Jaime in describing the situation 
with the Morrison and overlying Cretaceous units.  Probably, Jaime meant to 
say disconformity or even unconformity.  Second, nowhere does the Sundance 
Formation overlay the Morrison Fm.  It underlies and interfingers with the 
Morrison, but does not occur in a position between the Morrison and the 
Lower Cretaceous succession.  Dinosaur anatomy is good and all that, but 
some basic understanding of strata from which they are collected is helpful 
too.

It is absolutely CRITICAL to nail down the stratigraphic position of fossils 
as accurately as possible in order to avoid problems of biostratigraphic 
uncertainty, faulty paleoecological interpretations, and all 'round nonsense 
associated with lack of good data.

cheers,
The Sniffer

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