[halfcat]

Erosion would happen, but also icebergs would wipe out anything like buildings during the next ice age. And eventually subduction would consume the existing earth’s surface into the inner molten layer, leaving behind zero trace, but that might take hundreds of millions of years.

[Gare]

Cratons don't get subducted, that's a common misconception.

https://en.wikipedia.org/wiki/Craton

[halfcat]

Interesting! Thank you. So craton areas, say, near the equator where icebergs may not reach, could possibly contain remnants from indefinitely old civilizations?