Near the southern tip of Spain is the ancient citadel city called Medina Sidonia, the City of Sidon, who of course was Posidon the builder of the circular canal City of Posidon of Plato’s story, submerged about thirty miles south of Cadiz since circa 1500 b. c. when the Ice Age ended. Sidon was a son of Canaan, and progeny of Tarshish (a grandson of Japheth) later came when the Ice Age had ended to the region south of the mineral rich Sierra Morena mountains then become known as Tarshish/Tartessos.
