![]() The Chinese writer, poet, and politician Zhang Hua of the Jin dynasty wrote in his book Bowuzhi how people in Zigong, Sichuan, excavated natural gas and used it to boil a rock salt solution. They first discovered natural gas when they excavated rock salt. The earliest found salt mine was in Halstatt, Austria where salt was mined 5000BC.Īncient China was among the earliest civilizations in the world with cultivation and trade in mined salt. Salt is now plentiful, but until the Industrial Revolution, it was difficult to come by, and salt was often mined by slaves or prisoners. The railing (lower middle) gives the viewer an idea of scale.īefore the advent of the modern internal combustion engine and earth-moving equipment, mining salt was one of the most expensive and dangerous of operations because of rapid dehydration caused by constant contact with the salt (both in the mine passages and scattered in the air as salt dust) and of other problems caused by accidental excessive sodium intake. Inside Salina Veche, in Slănic, Prahova, Romania. History Diorama of an underground salt mine in Germany. ![]() The mined salt is usually in the form of halite (commonly known as rock salt), and extracted from evaporite formations. Salt mining extracts natural salt deposits from underground. Modern rock-salt mine near Mount Morris, New York ![]()
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