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Other hard rocks mined or collected for axes included the greenstone of the Langdale axe industry based in the English Lake District.The oldest-known mine on archaeological record is the "Lion Cave" in Swaziland, which radiocarbon dating shows to be about 43,000 years old.The rock was then worked upon by fire-setting to heat the rock, which would be quenched with a stream of water.

Hence, most of the world's nations have passed regulations to decrease the impact.However, it was the Romans who developed large scale mining methods, especially the use of large volumes of water brought to the minehead by numerous aqueducts.The water was used for a variety of purposes, including removing overburden and rock debris, called hydraulic mining, as well as washing comminuted, or crushed, ores and driving simple machinery.There, the water stored in large reservoirs and tanks.When a full tank was opened, the flood of water sluiced away the overburden to expose the bedrock underneath and any gold veins.

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