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Re: Age of Gobi formations
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
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.
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