'Snowball Earth' theory melted

BBC ^ | Wednesday, March 6, 2002

[SunkenCiv]

Hmm, maybe — I missed that. C-13 is the decay result of (sez here) boron-13 and nitrogen-13; the abundance of C-13 relative to C-12 (both are stable, ie don’t decay) in a mineral sample could be used to date that sample, or date the period of exposure to weathering.

http://www.astrobio.net/exclusive/293/when-did-life-on-earth-begin-ask-a-rock

“Normally, carbon-13 (C-13, with atomic weight 13), is much rarer than C-12. However, biological processes concentrate C-12, so when organic debris falls to the ocean floor, the C-12 to C-13 ratio rises still further in the sedimentary rock that forms. That ratio is preserved even in rocks that formed billions of years ago.”

however, also see:

http://www.sciencedaily.com/releases/2008/09/080910104202.htm

[DManA]

How do you explain all the cracks in the Earth.

How do you explain that N and S America fits into Africa and Europe perfectly?

[SunkenCiv]

How do you explain all the cracks in the Earth.

The Earth has cracks in it. That's the explanation.

How do you explain that N and S America fits into Africa and Europe perfectly?

It isn't true, but for such a superficiality to have any bearing on anything, it would be necessary for the elevations to have NOT CHANGED over 284 million years. Plate tectonics is warmed-over continental drift, and both are pareidolia.

[Ernest_at_the_Beach]

Haven’t seen that before...

[TigersEye]

There’s also a “Slushball Earth” version.

No one wants to get hit with that theory! ;^)

[Marine_Uncle]

"Haven’t seen that before..."
I'm staying out of this one.

[SunkenCiv]

:’)

[SunkenCiv]

This graphic shows the tilting of the Earth that might occur if a dramatic imbalance in the planet's mass distribution ever developed in the Arctic. According to the theory of true polar wander, a heavy spot in the Arctic -- caused by a very large upwelling of magma, for instance -- would reorient the planet over 5 to 20 million years so that the heavy spot would lie at the equator, changing the orientation of the Earth in relation to its poles. New evidence uncovered by the team of Princeton geoscientist Adam Maloof shows that this sort of reorientation may have occurred in the planet's distant past. (Graphic: Maloof Laboratory)