Like a Jules Verne fantasy, a ghostly city with its own network of four lane highways lies deep beneath the industrial heart of Detroit, its crystalline walls glittering and gleaming in the flickering light. It is a world of no night or day.
It is a world of salt.
This gigantic salt mine, 1,200 feet beneath the surface, spreads out over more than 1,400 acres with 50 miles of roads. It lies underneath Dearborn's Rouge complex , much of Melvindale and the north end of Allen Park. The mine shaft opening is in Detroit.
The International Salt Mine Company operated the mines until 1983, when falling salt prices brought a halt to production.
In Michigan, a huge sea covering the region evaporated more than 400 million years ago, forming salt deposits which were gradually buried by glacial activity. This salt bed spreads over 170,000 square miles under Michigan, Ontario, Ohio, Pennsylvania, New York and West Virginia.
Some estimates suggest that there is enough salt in the Metro Detroit underground to last 70 million years.
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