The Earth Day Special

[Snarl]

If civilization fell ... in a thousand years ... there'd be little to nothing left.  Megaliths (that would likely include your mines) tend to stay.  Probably our nuclear waste will too, unless we find a way to give it back to the Earth's core.  Kind'a wonder about the micro-plastics issue too.

 True, any thing that wouldn't rot, deteriorate in a few years would be incorporated back into nature somehow. Like the cities that have been swallowed up in south and central america by the jungle, before lidar you could be walking in the middle of one and never know it.

My mind always goes to concrete.  Ours doesn't last anywhere near as long as the stuff the Romans built their aqueducts with.

So, I guess there would be deposits of the stuff thousands of years from now, but would anyone from a follow-on civilization be able to deduce what they once were.