Exactly. While the elapsed KT transition period was a blink of geological
time, it may have lasted several decades or several centuries. Dinosaur
populations were scattered all over the world and, as recent evidence
suggests, they were very robust and diverse. It is extraordinarily difficult
to image a scenario where a series of tsunami, even huge tsunami, could
obliterate all these populations. And a tsunami event would not explain why
late Mesozoic sea reptiles as well as pterosaurs would also be wiped out.
Unless of course you believe that a few of the sea beasties are still hiding
out in a long thin but very deep lake in Scotland! grin

e.


"Aidan Karley" wrote in message
. invalid...
In article , EarlCox
wrote:
The question then becomes, could any
truly huge tsunami (or even a series of huge tsunami), regardless of the
cause, do sufficient damage world-wide to kill off the dinosaurs
(recalling
that dino fauna have been found in South America, in the arctic, in the
American west, in Australia, etc.) Right off the bat, it doesn't seem
plausible.

Throw in the demonstrated fact that dinosaurs were living in
mid-Arctic latitudes in the mid-Cretaceous and it gets very hard to argue
that there were *no* dinosaurs in upland areas in the summer hemisphere at
the time of impact/ tsunami, and it gets really hard to sustain the
argument.
The point for the asteroid impact hypothesis is that a "asteroid
winter" could last *several years*.

--
Aidan Karley,
Aberdeen, Scotland,
Location: 57°10'11" N, 02°08'43" W (sub-tropical Aberdeen), 0.021233