Potash mine near Moab, Utah
The SPOT-7 satellite acquired this view of a potash mine near Moab, Utah, in the USA in 2016. This mine contains the potassium-containing salt called "Potash", which is widely used by farmers in fertilisers.
Usually, potash forms in arid regions when seas or lakes dry out because evaporation of water leaves behind deposits of potassium salts.
According to NASA, "Over geologic time, sediment buries these deposits and they become potash ore. The ore at Moab—which actually lies about 1,200 meters (3,900 feet) below the surface and within the Paradox Formation — began to form about 300 million years ago."
In 2013, about 970,000 metric tons of potash was produced in the USA in total, and about 60 percent of this potash was obtained by the Moab mine. The U.S potash is normally utilised by the fertiliser industry and the rest is used by the chemical industry.
The mine is visible as a grey area in the top half of the image, but it's the nearby evaporation pools which capture our attention. The pools are dyed (clearly visible in shades of dark blue and purple) to help the process of evaporation by retaining heat from the sun.
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