Definitions for "Isostatic rebound"
"bouncing back" of the mantle (and the crust atop it) following the removal of weight. The weight of thousands of feet of glacial ice would have depressed the plastic magma of the mantle. When the ice weight was removed, the magma rebounds.
a geological concept that explains how the crust of the earth can rise up after being pushed down by the weight of glaciers. Evidence of isostatic rebound is common along shorelines in glaciated regions around the world.
The upward movement of the Earth's crust following isostatic depression.