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

[drainboy.livejournal.com]

I guess that inundation could be the cause of all of the flood stories that occur in so many myths and legends (I imagine that's a quite common thought amongst people studying such things).
I wonder how many likely candidate areas have been searched under water for ancient stone settlements. Maybe not the easiest things to find or getting funding to look for.