History of Snowball Earth

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	Revision 7 . . November 30, 2001 3:48 am by Paul Drye [Incorporating change suggested in /Talk]
	Revision 6 . . November 30, 2001 3:47 am by Paul Drye [Incorporating suggestion from /Talk]
	Revision 5 . . November 27, 2001 8:41 am by Don Kenney [Added a talk item re magnetic vs geodedic latitude]
	Revision 4 . . November 27, 2001 5:45 am by Paul Drye [It wasn't the oxygen that was the problem, but darkness and cold. However, your point about smoker life is still the counter so I rephrased and kept it.]
	Revision 3 . . (edit) November 27, 2001 5:37 am by (logged).128.16.xxx [no oxygen doesn't necessarily mean no life survives]
	Revision 2 . . November 27, 2001 5:26 am by Eob [Links to orders of magnitude comparison page]
	Revision 1 . . November 27, 2001 5:11 am by Paul Drye [Initial entry. Could use some more "contra", but opposing theories are much less interesting, and thus harder to find details on.]

Difference (from prior major revision) (author diff)

Changed: 19c19

One competing, less-radical theory to explain the presence of ice on the equatorial continents was that the Earth's axial tilt was quite high, in the vicinity of 60°, which would place the Earth's land in high "latitudes". An even less severe possibility would be that it was merely the Earth's [magnetic pole]? to this inclination, as the magnetic readings which suggested ice-filled continents depends on the magnetic and rotational poles being relatively similar (to be fair, there is some evidence to believe that this is the case). In either of these two situations, the freeze over would be limited to relatively small areas, as is the case today, and severe changes to the Earth's climate are not necessary.

One competing, less-radical theory to explain the presence of ice on the equatorial continents was that the Earth's axial tilt was quite high, in the vicinity of 60°, which would place the Earth's land in high "latitudes". An even less severe possibility would be that it was merely the Earth's [magnetic pole]? that wandered to this inclination, as the magnetic readings which suggested ice-filled continents depends on the magnetic and rotational poles being relatively similar (to be fair, there is some evidence to believe that this is the case). In either of these two situations, the freeze over would be limited to relatively small areas, as is the case today, and severe changes to the Earth's climate are not necessary.