The Euphrates would have left Africa from the Ethiopian Delta in the lower right corner of the map above. The west nile vanished but was recorded by Herodotus ca440.bC.
You can see how easy it would have actualy been for Moses to cross the Red Sea in antiquity.
This map that I made below, is my view of the Flooded "known world".
It's interesting how the Sinai appears as the Egyptian heiroglyph for a foreign land!
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