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I guess my point is, when does a drought become subsumed as a principal part of the climate change cycle. Anyway, good points and info. I just cant get my mind around a 100,000 year drought; however, climate change over that period, seems more reasonable.

The first part of the current ice age had cycles of about 40,000 years of ice followed by an interglacial of 10,000 years of warmth and high ocean levels. The second part of the current ice age had cycles of about 100,000 years of ice followed by an interglacial of 10,000 years of warmth and high ocean levels.

We've had about 20 such cycles!

The climate for 2.5 million years for most of the planet has therefore been ICE AGE ~ GLACIAL. The climate for a couple of million years before that was PRE ICE AGE - NON GLACIAL ~ but the Southern Hemisphere had it's own cycles of expansion and contraction of the Antarctic ice pack.

Several sources say the ice in the Ghost Mountains (2 miles deep ~ covers all the mountains) in Antarctica may well have been there 500 million years! Nobody's been to the bottom yet, so who knows eh!

I suspect the almost permanantly iced up condition of much of Antarctica has a lot to do with advances of glaciers in the Northern hemisphere though, so we should keep our eyes on the place. Currently it's getting colder and producing more ice ~ just freezes it right out of the air too!