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200 million years ago, when the Earth's surface was unrecognisable from the way we see it now, Cheshire was located beneath the seabed of a huge ocean. Over many thousands of years these oceans evaporated, leaving behind the salt as gigantic deposits. This salt was buried deeper and deeper by the continual deposition of dust, earth and rock. It is this same salt which is spread on the UK's roads during Winter in order to keep them ice-free and safe for transport.


By mining more than 150m below the surface, Compass Minerals is able to extract this rock salt, crush it to suitable sizes for use, add certain products and elevate it to the surface, where we keep a healthy emergency stockpile of around half a million tonnes whilst distributing it all around the UK to be used in Winter for the safety of the population. More information on our origins can be found in the History Of Salt tab.