suolakaivannoiksi
Suolakaivannoiksi, the Finnish plural of salt mines, refer to places where halite (rock salt) is extracted from subterranean deposits. Salt mining has been practiced for thousands of years, with the earliest documented mines in the ancient Near East and the deposits of the Black Sea. In Finland, salt mining began in the 17th century, notably at the old unmineable Selkävirta mine in Kuopio, while most Finnish salt consumption is now imported or produced in saltworks.
Extraction methods differ depending on deposit characteristics. Traditional room and pillar mining is used in solid
Salt mines play a role beyond food preservation. The beds of salt can store large amounts of