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RE: Antarctica moved too (was RE: Warm southern winters)
Tracy Ford wrote:
> I take it it was Antarctica that got colder? :0 (just kidding).
Well it sure wasn't Australia. Crikey, it gets bloody hot there in Summer!
> > But during the Cretaceous, Antarctica would be expected to
> > have climatic conditions not too different from most of Australia.
> Most of Australia? I don't know Australia's climatic (except for that
> huge desert), and the outer northern (?) crocodile infested area, but
> there is a more temperate forest there right? Where is it?
In the present day, this would be eastern Australia. But actually I was
referring to Cretaceous Australia. The climates of Antartica and Australia
would have been comparable back then, considering their relative positions
to each other and to the pole.
> So, let me understand what your saying. The southeastern corner of
> Australia and the adjacent portion of Antarctica were next to each
> other. The Australian side had permafrost, while the adjacent
> Antarctica, which was real close to each other, was more tropical? Ok...
Umm... no, that wasn't what I said. Southeastern Australia had a similar
climate (i.e. cold in winter) to the adjacent PART of Antarctica. Sure,
part (and perhaps most) of Antarctica was temperate/subtropical - ditto for
most of Australia.
Australia and Antarctica are both darn big landmasses (even accounting for
the fact that a chunk of central Australia was underwater), and the climatic
conditions varied greatly from one end of the continent to the other - for
BOTH continents. In the Early Cretaceous, PART of both continents were
within the current "Antarctic Circle". It was these parts that were exposed
to cold dreary polar winters.
> you can put frost on the ground and feathers on what ever animal you
> want. I just don't buy it.
I'm certainly not advocating feathered prosauropods - but I'm not
discounting the possibility either.
Timothy J. Williams, Ph.D.
Iowa State University
Ames IA 50014
Phone: 515 294 9233
Fax: 515 294 9359