Melt streams on the Greenland Ice Sheet on July 19, 2015. Ice loss from the Greenland and Antarctic Ice Sheets as well as alpine glaciers has accelerated in recent decades. NASA
Credit: Maria-José Viñas.

As the ice sheets of the world melt, an enormous amount of pressure will be lifted off of the continental crusts that play host to them, as well as the surrounding oceanic basins. Something similar is broadly true, but to a much lesser degree, of the world’s remaining large glaciers (think of the Himalayas).

As this pressure is lifted, after tens of millions of years of being there, tectonic and volcanic features that have been dormant for hundreds of thousands of years or even tens of millions of years will awake — as will broader geologic-system elements and processes.

The ice sheets of East Antarctica have effectively been there in one form or other for ~15 million years (to a lesser extent than now, though), while a portion of the Greenland ice sheet is thought to have partially melted around 120,000–130,000 years ago […]

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