[hellbender]

Then, about 250-100 million years ago, when dinosaurs roamed the planet, the crust started to pull apart in a series of rifting events close to the old root. This rifting warmed and rejuvenated the root, giving it the buoyancy needed to lift the land upwards once more to re-establish the mountains.

This might be similar to the rejuvenation of the southern Appalachians during the Cenozoic Era.

[Cardhu]

You guys are making me Google those wonderful names.