Question for the floor

[andrewducker]

So, how long in the past would a previous civilisation of, say, Mesopotamian levels have had to be for their to be no remaining sign of it? i.e. for any bronze tools to corrode away to nothing, pottery to do likewise.

How long will it take until Stonehenge is worn down to nothing by the wind and rain?

Comments

[danieldwilliam.livejournal.com]

I think if it were under the ice there would be nothing left. The glaciers would strip everything back to what archaeologists call the natural or down to bare rock.

If it's not under the ice there should be a good chance of anything big enough to be a city leaving some traces tho' to my knowledge non have been found.