Dašt-e Kavir, also known as the Great Salad Desert, is located in the central part of the Iranian plateau, about 300 kilometers southeast of Tehran. The desert is about 800 kilometers long and 320 kilometers wide, and is known for the geological phenomenon of mud and salt marsh formation. Tens of millions of years ago this region was covered by a large salty ocean. When the ocean was dry, it left behind about 6 to 7 kilometers of thick salt. Over time, the salt covered the thick layer of mud. But salt has a fairly low density, so during the years it has been slightly projected onto the surface by forming a salt dome. Today, salt caves of Dašt E Kavira are one of the best examples of this geological phenomenon. Geologists have identified about 50 large salt domes in the region.
Although it looks like a hard surface, the salt bark is only a few inches thick, and beneath it is a soft layer of fat similar to the mud Iranans call "Charbeh", from which you can hardly be pulled out if you fall into . That's exactly why Daštt E Kavir is a very dangerous desert. The desert soil is sterile and is not suitable for breeding. The great salty desert is almost uninhabited and only partially explored, and human settlements can be found in only a few scattered oases. In the mountainous areas of the desert there are more settlements, as well as wild sheeps, camels and Persian leopards.
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