“This is fascinating”:http://www.livescience.com/forcesofnature/060519_moving_mountain.html
A mountain near the Montana-Wyoming border once moved 62 miles in a half-hour in a catastrophic scenario that could be repeated elsewhere, scientists say. Rock at the summit of Heart Mountain is 250 million years older than at its base. That suggests the top and the bottom have not always been together. The presumed migration to its present home has puzzled scientists for years. They have known the mountain moved, but no one has explained how it happened or how long it took.