Radiocarbon dating its scope and limitations

Rated 3.98/5 based on 763 customer reviews

The rock was then worked upon by fire-setting to heat the rock, which would be quenched with a stream of water.The resulting thermal shock cracked the rock, enabling it to be removed by further streams of water from the overhead tanks.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.He also captured gold mines in Thrace for minting coinage, eventually producing 26 tons per year.Flint mines have been found in chalk areas where seams of the stone were followed underground by shafts and galleries.

These mines are described by the Greek author Diodorus Siculus, who mentions fire-setting as one method used to break down the hard rock holding the gold.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.Mining is the extraction of valuable minerals or other geological materials from the earth, usually from an orebody, lode, vein, seam, reef or placer deposits.These deposits form a mineralized package that is of economic interest to the miner.

Leave a Reply