aerial view over an open quarry in Brazil on the side of the Iguazu River near Foz do Iguazu with the rock piles and excavators

openpit quarry openpit open quarry quarrying opencast quarry ore geology environmental aerial pit limestone landscape dig mineral damage foz do iguazu construction mine excavator industry iguazu river development drone large extraction brazil digging production red stone rock gravel iron granite machinery surface nature metal equipment dirty work truckload technology heavy gold vehicle truck business