How It Works
The Salar de Uyuni in Bolivia is the world’s largest salt flat

How do salt flats form?

The Salar de Uyuni in Bolivia is the world’s largest salt flat
The Salar de Uyuni in Bolivia is the world’s largest salt flat

Salt flats are dried-up desert lakes. They form in closed hollows where rainfall can’t drain away. In a wet climate, a lake would form but, in a desert, the water is heated and evaporates into vapour faster than it is replenished by rain. The salt and minerals dissolved in the water are left behind as a solid layer. Some salt flats are massive. Bonneville Salt Flats in Utah, USA, were formed by the evaporation of an ancient lake as large as present-day Lake Michigan. They are flat enough to be used as a raceway for setting land-speed records.




  • 1reallytaxed1

    You mean it was climate change? hmmm, I thought it was only a modern day problem?