I say this all the time, but I never knew where it came from. According to this site: http://www.answers.com/topic/back-to-the-salt-mines and several others, it comes from the practice of punishing prisoners in Siberia by sending them to work in the salt mines there.
There are 7 million salt mines.
The salt mines in Africa where located in tha city of Taghaza The salt mines in Africa where located in tha city of Taghaza
Salt is extracted from salt mines.
They traded gold, salt. They had a lot of gold mines and salt mines.
Thousands of years ago the ancients mined salt ( many of those mines are still working) and it is the salt mines that gave them the salt.
sea salt or salt mines
Salt in mines is the result of the evaporation of oceans waters billions years ago.
Salt is extracted from mines or sea water.
Salt mines
Salt is extracted from salt mines or from sea waters.
Salt is extracted from salt mines as a solid or as a brine.
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