Comment by rbanffy
13 hours ago
It all depends on how long. Eventually all the current surface will be sucked under tectonic plates and come out after passing some time in the mantle. We can plan for that by planting evidence in places that aren’t likely to go through that, but, give enough time, most of the crust will be recycled.
the earth is old though, i'd think that the sun will have expanded and made the planet uninhabitable before all the crust is recycled. i've heard there's only 500million years left, assuming we don't destroy it before then.