For what it’s worth, my working hypothesis is that a major geological process responsible for shaping and reshaping Earth’s surface, mainly continental divisions and coastlines, has been overlooked. Generally, when we think of geological erosion we think of small amounts of materials being worn away by wind, water or ice (glacial motion) over long periods of time. However, I am of the opinion that Earth geological erosion processes aren’t always so subtle. [br]      That being said, I conjecture that Earth periodically casts off, setting adrift the entirety of its polar ice accumulations mainly upon the Northern Pacific & Sothern Atlantic oceans within 8-16 hours, from start to finish. Once irreconcilably off axis and adrift, these massive accumulations of ice would disrupt ocean currents and begin to accelerate in the direction of centrifugal force outward away from the Earth’s axis and towards the equator. The Arctic and Antarctic ice sheets are estimated to contain 4.6 and 7.2 million square miles of ice respectively and having almost zero rotational velocity, they would achieve relative impact velocities with their new surroundings (equatorial land masses/continent(s)) upward of nine hundred miles per hour, capable of displacing millions square miles of earth and rock in a matter of hours (rifting by extrusion). The proceeding bow wave, and ensuing wake would drive massive ice flow tsunamis inland causing further erosion. Additionally, the subsequent melting and runoff should be capable of carving great canyons on relatively short geological time scales.