Did True Polar Wander Cause the Ice Ages? - Lance Weaver, Utah Geology

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We've all heard the popular theories explaining the clockwork
cycle of glaciations that generally boil down to a series of
overlapping eccentricities in the Earths' solar exposure. These
Milankovitch cycles still don't entirely satisfy our need to
explain the bistability of the system: what causes the Earth to
regularly jump from glacial to interglacial over the course of a
few tens to hundreds of years? Lance Weaver from Utah State
Geology suggests the hypothesis that a true polar wander would
neatly fill in the blanks, whereby some variety of mass imbalance
would cause a true pole shift event that snapped the axis of the
Earth between two stable barycenters. It would certainly explain
why the periodic glaciers seem to be centered directly over
Greenland instead of the North Pole.

#poleshift #geology #iceage   

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