When a full tank was opened, the flood of water sluiced away the overburden to expose the bedrock underneath and any gold veins.
Mining in Egypt occurred in the earliest dynasties.
The gold mines of Nubia were among the largest and most extensive of any in Ancient Egypt.
Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final reclamation of the land after the mine is closed.
Mining operations usually create a negative environmental impact, both during the mining activity and after the mine has closed.
The marble was shipped away and was later found by archaeologists to have been used in buildings including the tomb of Amphipolis.
Philip II of Macedon, the father of Alexander the Great, captured the gold mines of Mount Pangeo in 357 BC to fund his military campaigns.
Due to the low recycling rates, some landfills now contain higher concentrations of metal than mines themselves.
Since the beginning of civilization, people have used stone, ceramics and, later, metals found close to the Earth's surface.
The miners crushed the ore and ground it to a fine powder before washing the powder for the gold dust. Examples include the silver mines of Laurium, which helped support the Greek city state of Athens.