A salt mine is an operation involved in the extraction of salt. Areas known for their salt mines include Wieliczka in Poland, Salzkammergut in Austria, Slănic in Romania and Avery Island in Louisiana. The El Chino Mine located near Silver City, New Mexico is an open-pit copper mine This article is about mineral extraction. ... A magnified crystal of a salt (halite/sodium chloride) In chemistry, a salt is any ionic compound composed of positively charged cations and negatively charged anions, so that the product is neutral and without a net charge. ... Motto: none Voivodship Lesser Poland Municipal government Rada Miejska w Wieliczce Mayor Józef Duda Area 13,4 km² Population  - city  - urban  - density 18 190 - 1357/km² Founded City rights - - Latitude Longitude 49°59 N 20°03 E Area code +48 12 Car plates KWI Twin towns - Municipal Website Wieliczka is... Salzkammergut is a resort area east of Salzburg, Austria, spanning the federal states of Upper Austria, Salzburg, and Styria. ... Slănic is one of the 12 towns of Prahova county, România. ... Avery Island (La Saline in french) is a salt dome located in Iberia Parish, Louisiana, United States, about three miles (5 km) inland from Vermillion Bay, which in turn opens onto the Gulf of Mexico. ... Official language(s) English and French Capital Baton Rouge Largest city New Orleans at last census; probably Baton Rouge since Hurricane Katrina Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 31st 134,382 km² 210 km 610 km 16 29°N to 33°N 89°W to 94°W Population...

Prior to the advent of the internal combustion engine and earth moving equipment, mining salt was one of the most expensive and dangerous of operations. While salt is now plentiful, in the ancient and medieval world, salt was difficult to come by, and salt mining was often done by slave or prison labor. In ancient Rome, soldiers were paid in salt (hence "salary"), and salt on the table was a mark of a rich patron (and 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 so sentenced was not great. A colorized automobile engine The internal combustion engine is a heat engine in which combustion occurs in a confined space called ICE. Four-stroke cycle (or Otto cycle) // History Non-compression Leonardo da Vinci, in 1509, and Christiaan Huygens, in 1673, described constant pressure engines. ... City motto: Senatus Populusque Romanus – SPQR (The Senate and the People of Rome) Founded 21 April753 BC mythical, 1st millennium BC Region Latium Mayor Walter Veltroni (Left-Wing Democrats) Area  - City Proper  1285 km² Population  - City (2004)  - Metropolitan  - Density (city proper) 2,553,873 almost 4,300,000 1. ... A salary is a form of periodic payment from an employer to an employee, which is specified in an employment contract. ...

Modern rock salt mine near Mount Morris, New York

Even as recently as the 20th century, salt mining in the Soviet Union and Nazi Germany was performed by persons being punished. Download high resolution version (1200x900, 845 KB)Rock salt mine near Mt. ... Download high resolution version (1200x900, 845 KB)Rock salt mine near Mt. ... Mount Morris, New York refers to two locations in Livingston County, New York, both named after Robert Morris, the financier of the American Revolution, and later owner of the The Morris Reserve, from which the lands around Mount Morris were sold to settlers. ... Nazi Germany, or the Third Reich, commonly refers to Germany in the years 1933–1945, when it was under the firm control of the totalitarian and fascist ideology of the Nazi Party, with the Führer Adolf Hitler as dictator. ...

Today most salt mines are operated by large multi-national companies like Cargill and Compass Minerals. Cargill, Incorporated is a privately held, multinational corporation, and is based in the state of Minnesota in the United States. ... Compass Minerals International (NYSE: CMP) is the second-leading salt producer in the United States and largest in the United Kingdom. ...

External links

• Salt Mine