Plato certianly lied when he wrote that the submergence of Atlantis had blocked the passage from the Mediterranean to the Atlantic, that passage the Strait of Gibraltar, anciently known as the Pillars of Hercules, because Plato when writing circa 350 b.c. about Atlantis and its demise (with the end of the ice age) surely knew that greeks were colonizing all over the Iberian Peninsula (Spain) centuries before his time, from around 700 b.c. on up to and through his time, beginning with the report by Herodotus that the greek navigator Kolaios of Samos had sailed to Tartessos (the ruins of its capital now under Seville), and the founding of Mainake within the kingdom of Tartessos (named after the biblical Tarshish).
And phocaean Greeks founded Massalia (now Marseilles) on the french coast not far from Gibraltar circa 600 b.c, those greeks beyond doubt were knowledgable too that the Straits of Gibraltar were not blocked, and then they founded Nicaea, later known as Nice, named after the greek goddess Nike, and then Monoikos, now known as Monaco. The greeks in that region were rivals of the Carthaginians of north Africa, who founded many cities west of Gibraltar, and conquered Tartessos circa 560 b.c., so we are to believe that the greeks really thought the Straits of Gibraltar were blocked at Plato’s time or ever?
Plato used the word nesos for both the ringed island city of Atlantis, half nautical mile in diameter (now submerged about 30 miles south of Cadiz), and for the greater coastal atlantean empire, commonly thought a bigger island, but it was really the Iberian (named after biblical Eber) peninsula, because the word nesos is in the ancient greek labeling for the balkan peninsula, the homeland of the greeks, the Peloponnesos, a peninsula, as was the heartland of the greater atlantean empire, the nesos of western Europe, the iberian peninsula, rendering it clear that Atlantis, complete with the biblical names associated with it, was an ice age empire, having been lost to the sea when the ice age ended, learn a great deal more here http://genesisveracityfoundation.com.