There is probably a more cautious way to word the last paragraph of the Snowball Earth discussion. The anamolous equatorial glacial deposits can be accounted for either by a high axial tilt for the Earth (What untilted it?) or by a lesser tilt in the axis of the magnetic field combined with a "normal" glaciation. Someone reported a very high rate of N/S continental motion in the lower Cambrian a few years ago -- which should make one wonder if just maybe the magnetic field wasn't wandering a bit back then.
How about "Competing theories to explain the presence of "equatorial" glaciers explain the phenomenon by assuming that the Earth's axial tilt at the time was roughly 60 degrees or that the magnetic poles used to determine ancient latitudes were wandering further from the physical poles than at later times."
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