Re: Report Sez Volcanic Gases Killed The Dinosaurs

[Tommy Tyrberg <tommy.tyrberg@norrkoping.mail.telia.com>]

At 20:59 2007-11-04, David Marjanovic wrote:

> I'd rather say that the current positions of the continents -- one 
> continent at the South Pole, a ring of continents around the Arctic 
> Ocean -- makes ice ages possible if the carbon dioxide level is low 
> enough, which it is, thanks to (roughly) the Tibetan plateau being 
> above the treeline. That's why only the most extreme interglacials 
> (like the one 400,000 years ago) succeed in melting Greenland 
> anymore; Greenland used to be ice-free well into the Mio- or 
> probably Pliocene.

Almost certainly the Pliocene. The Kap Kobenhavn formation fossils 
shows that there was taiga in *northern* Greenland in the late Pliocene.

Tommy Tyrberg