Re: Climate Changes Mid-late Dinosaur era.

["David Marjanovic" <david.marjanovic@gmx.at>]

> >>(on the contrary, the seas were all warm down to great depths,
> and at least sometimes the Canadian Arctic were nearly tropical).<<
> I have a side question, here. Just how extensive _was_ global warming
during the
> Cretaceous? Was there _any_ polar ice?

Phew... usually the Arctic Ocean was, as today, under the North Pole, so any
ice there is unlikely to have left many traces, and first a meanwhile
subducted part of the Pacific and then Antarctica were under the South Pole,
so any evidence is gone. Climatic models predict no ice at all, AFAIK.

Global temperatures must have been quite warm indeed, and the temperature
differences between latitudes very low. Palm trees grew on Spitsbergen aka
Svalbard, champsosaurs thrived on Bylot island in the northern Canadian
Arctic (Nunavut meanwhile)...