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For these histories tell of a mighty power which unprovoked made an expedition against the whole of Europe and Asia, and to which your city put an end. This power came forth out of the Atlantic Ocean, for in those days the Atlantic was navigable; and there was an island situated in front of the straits which are by you called the Pillars of Heracles; the island was larger than Libya and Asia put together, and was the way to other islands, and from these you might pass to the whole of the opposite continent which surrounded the true ocean; for this sea which is within the Straits of Heracles is only a harbour, having a narrow entrance, but that other is a real sea, and the surrounding land may be most truly called a boundless continent. Now in this island of Atlantis there was a great and wonderful empire which had rule over the whole island and several others, and over parts of the continent, and, furthermore, the men of Atlantis had subjected the parts of Libya within the columns of Heracles as far as Egypt, and of Europe as far as Tyrrhenia.

In the first place you
remember a single deluge only, but there were many previous ones; in
the next place, you do not know that there formerly dwelt in your land
the fairest and noblest race of men which ever lived, and that you and
your whole city are descended from a small seed or remnant of them
which survived. And this was unknown to you, because, for many
generations, the survivors of that destruction died, leaving no
written word. For there was a time, Solon, before the great deluge
of all, when the city which now is Athens was first in war and in
every way the best governed of all cities, is said to have performed
the noblest deeds and to have had the fairest constitution of any of
which tradition tells, under the face of heaven.

Plato was pretty specific about his description of the mediterranean as a basin, the Atlantic ocean as a true sea in comparison to the Mediterranean, and the other continent on the other side of the Atlantic as surrounding it.

Cognito wrote:

Plato was pretty specific about his description of the mediterranean as a basin, the Atlantic ocean as a true sea in comparison to the Mediterranean, and the other continent on the other side of the Atlantic as surrounding it.

Be careful here since prior to 1601 the name used on every map for the Atlantic Ocean was Latin, Mare Oceanum.

The first part of its name refers to the Atlas of Greek mythology, making the Atlantic the "Sea of Atlas". The oldest known mention of this name is contained in The Histories of Herodotus around 450 BC (I 202); see also: Atlas Mountains.

Cogs, Herodotus mentions the Atlantic Ocean around 450 BC. Plato was about 20 years after that.

The huge continent we call Atlantis, the continent of the fourth Race, named Kusha in the occult records, embraced northern Asia - untouched, as said, from Lemurian times - stretching far to the north of the great sea, now the Gobi Desert; it extended eastwards, in a solid block of land, including China and Japan, and passed beyond them across the present northern Pacific Ocean, till it almost touched the western coast of North America; southwards it covered India and Ceylon, Burmah, and the Malay peninsula, and westwards included Persia, Arabia and Syria, the Red Sea and Abyssinia, occupying the basin of the Mediterranean, covering southern Italy and Spain, and, projecting from Scotland and Ireland, then above the waters, into what is now sea, it stretched westwards, covering the present Atlantic Ocean and a large part of North and South America.

The catastrophe which rent it, in the mid-Miocene, about four million years ago, into seven islands, of varying size, brought to the surface Norway and Sweden, much of southern Europe, Egypt, nearly all Africa, and much of North America, while sinking northern Asia, and breaking Atlantis off from the Imperishable Sacred Land. The lands later called Ruta and Daitya, the present bed of the Atlantic, were rent away from America, but a great belt of land still connected them, a belt submerged in the catastrophe of 850,000 years ago, in theatre Pliocene, leaving the two lands as separate islands. These, again, perished, some 200,000 years ago, leaving Poseidonis in the midst of the Atlantic.

After the disappearance of Poseidonis, (the last remaining island after the Deluge) the deterioration of the scattered Atlantean tribes was rapid, though the Atlanteans in the east of Asia held their own and the Polynesians, Samoans and Tongas are surviving relics. Some of the tribes even sank so low as to intermarry with the hybrid creatures that sprang from the sin of the mindless. Others intermarried with the degraded remnants of the seventh Lemurian sub-race, and the Veddahs of Ceylon are the descendants from such unions, as are the hairy men of Borneo, the Andaman Islanders, Bushmen, and some Australian aborigines. The majority of the inhabitants of the earth are still Fourth Round people, but the only ones that seem to have future are the Japanese, and perhaps the Chinese.

Atlantic ocean

1387, ocean of athlant "sea off the west coast of Africa," from L. Atlanticus, from Gk. Atlantikos, adjectival form of Atlas (gen. Atlantos), in ref. to Mount Atlas in Mauritania (see Atlas). Applied to the whole ocean since 1601.