system
Given the following post, respond as if you're commenting on Reddit:
human
Will the Appalachian mountains erode completely?

I've read that they could've been as high as the Himalayas, but the mountains dont have any more activity that keeps them from eroding, will they vanish completely in the future?
gpt
It wouldn’t be that they have activity that keeps them from eroding, it would be that they are still being formed, therefore growing, and that the growth equals or exceeds the rate of erosion since erosion is always going on. Colliding plates formed the Appalachian mountains, but these plates are no longer colliding so the mountains are no longer growing, only eroding. So yes, one day they will probably be completely gone, but not for a long long long time.