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Re: [dinosaur] Paleocene tyrannosaurs in Montana
The probability of tyrannosaurs having existed in the Paleocene is about the
same as the chance of an asteroid hitting Philadelphia tonight. So, if Philly
is still here tomorrow, you'll have your answer. Check the news.
Paul P.
On Sunday, October 25, 2020, 02:23:20 PM UTC, Thomas Richard Holtz
<tholtz@umd.edu> wrote:
What we have is essentially hearsay. We don't have the measured stratigraphic
sections to demonstrate it was in the Fort Union. (And I can tell you from
directÂexperience, the Hell Creek and the Fort Union are not always distinct
from each other! There is a reason there was a serious debate in the technical
literature in the early 20th Century where the Lancian dinosaurs were in the
Maastrichtian or the Danian.)
It is "said to be" 1.3 m over the boundary; it is "said to have" almost no
wear; but we need independent confirmation of the facts.
(Additionally, a buried tooth or bone can be weathered out of a bank and buried
right there: it need not be transported far.)
On Sun, Oct 25, 2020 at 10:14 AM Poekilopleuron <dinosaurtom2015@seznam.cz>
wrote:
Good day to all listmembers!
I would like to ask, what is your opinion on this controversial topic: Given
that RigbyÂs 1980Âs research about supposedly early Paleocene T. rex teeth in
Montana was rejected (and the fossils in question are now considered to be
reworked), how was it explained, that they have very little surficial damage of
the enamel? If it was really carried by the river stream, then it would bear a
visible signs of mechanical damage from impacting stones in the riverbed,
right? Yet these fossil teeth, found 1.3 meters above the K-Pg boundary, are
said to be almost intact on its surface. Thank you for your thoughts, in
advance! Tom
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