The largest open-pit
ore mine is in Chile
is extracted from this pit, which is 3.8 x 1.8 x 0.6 km in size.
The deepest open-pit mine, (also the deepest hole made by man) is in the middle of Kimberley South Africa
, and is 1.2km deep. It was dug over 43 years from 1871 to 1914, and yielded 14,000,000 carats
, and 25,000,000 metric ton of soil and rock. The spoil
heaps can be found in every direction around the hole.
Source :- World Records In Chemistry, Faust, Knaus, Siemling Wiley-VCH