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RE: Pangea's weather?
The interiors of continents always have more extreme weather than the
coasts. Oceans act as a thermal buffer. So the interior of a
mega-continent would almost certainly have even more extreme weather
conditions than modern day continents. Think: central Asia.
That being said, I'd be deeply surprised if the fossil record could track
seasonal changes from desert to jungle and back again in the course of a
single year. I'm guessing the heart of Pangaea was probably like the
midwest, only more so. Sorching summers and blizzard-y winters without a
great deal of precipitation.
...but I'm just reasoning from first principles on this.
"There is no other wisdom,
And no other hope for us
But that we grow wise. -- Diane Duane
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