Discovery How Stuff Works : Salt
underground salt mine.
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HALLSTATT - Going Down the Salt Mine (Salzwelten)
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Salt mining in Danakil
From Wikipedia, the free encyclopedia
This article is about mining for salt. For the secret CIA prison, see
salt mine is a mine that extracts rock salt or halite from evaporite formations. [1 ]
Mining regions [ edit ]
The Crystal Valley region of the
Khewra Salt Mines
. With around 250,000 visitors a year, the site is a major tourist attraction.
made of salt bricks inside the Khewra Salt Mines complex.
Areas known for their salt mines include:
Hallstatt and Salzkammergut.
Provadiya; and Solnitsata, an ancient town believed by Bulgarian archaeologists to be the oldest in Europe and the site of a salt production facility approximately six millennia ago. [2 ]
Canada Sifto Salt Mine in
Goderich, Ontario, which, at 1.5 miles (2.4 km) wide and 2 miles (3.2 km) long, is one of the largest salt mines in the world. [3 ] [4 ]
England The "
-wich towns" of Cheshire and Worcestershire.
Racalmuto, Realmonte and Petralia Soprana within the production sites managed by [5 ] Italkali.
Morocco JMS salt mine in
N. Ireland Kilroot, near
Carrickfergus, more than a century old and containing passages whose combined length exceeds 25 km.
Khewra Salt Mines, the world's second largest salt-mining operation, spanning over 300 km.
Wieliczka and Bochnia, both established in the mid-13th century and still operating, mostly as museums.
(with Slănic Salina Veche, Europe's largest salt mine), Cacica, Ocnele Mari, Salina Turda, Târgu Ocna, Ocna Sibiului and Praid.
History [ edit ]
Diorama of an underground salt mine in Europe.
Before the advent of the
internal combustion engine and earth moving equipment, mining salt was one of the most expensive and dangerous of operations, due to rapid dehydration caused by constant contact with the salt (both in the mine passages and scattered in the air as salt dust), among other problems borne of accidental excessive sodium intake. While salt is now plentiful, until the Industrial Revolution it was difficult to come by, and salt mining was often done by slave or prison labor. In ancient Rome, salt on the table was a mark of a rich patron; those who sat nearer the host were "above the salt," and those less favored were "below the salt". Roman prisoners were given the task of salt mining, and life expectancy among those sentenced was low. The Roman historian Pliny the Elder stated as an aside in his Natural History's discussion of sea water, that "[I]n Rome ... the soldier's pay was originally salt and the word 'salary' derives from it ..." [7 ]
Even as recently as the 20th century, salt mining as a form of punishment was enforced in the
Soviet Union and Nazi Germany.
Most modern salt mines are privately operated or operated by large multinational companies such
AkzoNobel, Cargill and Compass Minerals.
See also [ edit ]
References [ edit ]
External links [ edit ]