As sediment builds up over the earth, it is compacted into layers of rock, which can be seen in the geological record. However, urban areas typically have good maintenance which washes away any opportunity for sediment to settle.
If we continue to maintain our urban areas, would there not come a point where the land around us starts to tower over the rest?
The "sinking city" problem helps illustrate the question.
In every city I can think of, the entire area is essentially a plateau of concrete and stone, my imagination conjures up dystopic-esque images of towns surrounded by walls of natural landmass - Which I think is pretty cool but probably not all that accurate. Jakarta and Lagos are the best (and only) examples I can think of, yet these are both coastal areas. Since geology is slow, is it safe to just assume that by the time this becomes a problem for us, we'll have already built over the pre-existing cities - circumnavigating the problem completely? What are your thoughts?