The Neolithic Flint Mines of Spiennes occupy two chalk plateaux located to the south-east of the city of Mons. They cover an area essentially devoted to agriculture. The site appears on the surface as a large area of meadows and fields strewn with millions of scraps of worked flint. Underground, the site is an immense network of galleries ...
how is copper extracted from its ore . How is copper extracted from ore? treehozz. Copper can be extracted from its ore by: Underground: sinking a vertical shaft into the Earth to an appropriate depth and driving horizontal tunnels into the ore This trickles slowly through the ore dissolving copper to form copper sulfate The copper is recovered by electrolytic refining.