If you don’t like Moses’ explanation of past world events then look to Plato for another view point.
From one myth to another. Plato’s Critias mentions the Atlantis fable.
“Many great deluges have taken place during the nine thousand years, for that is the number of years which have elapsed since the time of which I am speaking; and during all this time and through so many changes, there has never been any considerable accumulation of soil coming down from the mountains, as in other places, but the earth has fallen away all round and sunk out of sight. The consequence is, that in comparison of what then was, there are remaining only the bones of the wasted body, as they may be called, as in the case of small islands, all the richer and softer parts of the soil having fallen away, and the mere skeleton of the land being left.”
http://sacred-texts.com/cla/plato/critias.htm
Plato is not mentioning the sinking of Atlantis in this portion of the story. Earlier in the story he is describing a local myth where there is a gradual loss of land over a great period of time. He might be describing the slow flooding of the Mediterranean after the land mass between Spain and Morocco broke loose. At some point in ancient history the Atlantic Ocean drained into the Mediterranean. Geologists agree that the flooding of the Mediterranean happened but there is doubt that it happened during man’s existence.
You never know, some myths could have some sort of truth in them.