[Lucysgirl]

I also agree. This happened with the Cornish tin mines; they closed down due to difficult mining conditions including water problems and then decades later when world conditions prevailed and mining technology advanced they re-opened. I read not too long ago that one mine was estimated to be worth over £1billion and would be opening again.

I also have a vague recollection of reading one old Cornish tin mine had deposits of a mineral required for modern ipads - if that's true the workers should be laughing all the way to the bank.