Maybe I'm misunderstanding you, but what makes you expect the NaCL would be delivered by meteor? The area is geologically rich in salt already. From wiki: Move

Maybe I'm misunderstanding you, but what makes you expect the NaCL would be delivered by meteor? The area is geologically rich in salt already. From wiki: Movements of the Great Rift Valley system, along with the pressure generated by the slow accumulation of earth and rock, pressed down on the layers of salt, creating Mount Sodom. It is about 80% salt, 720 feet (220 m) high, capped by a layer of limestone [...] Because of weathering, some portions have separated. One of these pillars is known as "Lot's wife", in reference to the Biblical account of the destruction of Sodom and Gomorrah. https://en.wikipedia.org/wiki/Mount_Sodom https://en.wikipedia.org/wiki/Mount_Sodom