polar wander

British

noun

geology the movement of the earth's magnetic poles with respect to the geographic poles

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polar wander

The researchers agreed that true polar wander — the shifting of the north and south pole — was responsible for this ice placement.

From The Verge ● Mar. 23, 2016

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023