Snowball Earth: New Evidence Hints at Global Glaciation 716.5 Million Years Ago ( In the Yukon)

ScienceDaily ^ | Mar. 5, 2010 | Led by scientists at Harvard University,

[count-your-change]

“new precision”? Tropical rocks found in the North and that proves the South was cold? Say what?

[gogogodzilla]

Global Warming!!!

Al Bore said so...

[Publius6961]

Bookmark

[himno hero]

If you were to go to Ellesmere Island, you can still pick coral on the beaches there.... same coral that you can find in equatorial waters, example, Hawaii.. Coral Harbor, same thing. Calcium carbonate galore!!! So at one point it was warm there. Very warm.

Since then there has been a trend of incredible cooling!!!

I would blame it on a couple of things... asteroid impact and natural rotation thereby spinning the mantle to settle into a new polar equilibrium.

I shitteth yee not. Coral is there. Go look.

[Little Pig]

Those rocks used to be at the equator. Plate tectonics and all that.

[count-your-change]

And how would coral in northern climes demonstrate the equator was frozen? That would argue more for a subtropical climate earth wide.

[ETL]

LOL! I thought at first it was al-bore as a polar bear.

[bd476]

Thanks for the Ping Ernest. :)

[Ernest_at_the_Beach]

Did you notice the Polar Bears were laughing....LOL!

[ETL]

Yeah, I noticed it afterwards.

[himno hero]

There are many arguments that could be put forth and you are quite correct,,, at what time?
But if you accept polar caps, and there is equatorial coral under some of that ice at the current north pole, then the icy pole of that time had to be elsewhere.....

[ETL]

Here’s a link to part 1 of a terrific PBS and/or Discovery Channel special on the snowball Earth theory. There are 5 parts in all. You can catch the others at YouTube. They’ll be convenient links on the same page as part 1. Each of the 5 parts is 10 mins in length. It was originally a 1 hr doc.

http://www.youtube.com/watch?v=HG5_ufWfbuk

[count-your-change]

“......the icy pole of that time had to be elsewhere.”

Not necessarily:

“Temperatures of sea water fringing South Pole were tropical 50 million years ago
(PhysOrg.com) Oct. 8, 2009.. The temperature difference between equatorial and polar sea waters was minimal during the extremely warm ‘Greenhouse world’ 60 to 50 million years ago. This is the main conclusion drawn by a team of scientists from Utrecht University, the Netherlands, the NIOZ Royal Netherlands Institute for Sea Research and the University of California, Santa Cruz. The team of scientists, headed by Peter Bijl, show that circum-Antarctic sea water exceeded 30ºC at that time. The results were published in Nature this week.
.
What emerges from these results is that the Greenhouse pole-to-equator sea surface temperature gradient was close to non-existent. After the warmest phase (about 50 million years ago), the world gradually cooled down to an ‘Icehouse’ state, like today. Along with this cooling, the temperature gradient turned more and more into its present day shape.” (a partial quote)

[Ernest_at_the_Beach]

Not sure where this fits in but we have this thread:

The big picture: 65 million years of temperature swings

[Ernest_at_the_Beach]

This graph is from the material linked at post #34 above:

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Whoops ...time period doesn't go back far enough.

[count-your-change]

Even so it seems the warmer periods have been good for humans. Why that a slight warming is viewed with alarm is beyond me.

[Ernest_at_the_Beach]

It is about seizing control...where is that thread....?

Global Warming The Anthropocentric Crisis

[count-your-change]

Yup, but then it always was.

[Marine_Uncle]

Interesting article.

[neverdem]

BTTT!