I was referring to the ENTIRE earth...
There's no evidence that at any point in the history of earth was there no land surface and nothing but Ocean.
There have been plenty of really big glacier-burst floods, and transgressions of oceans on continental shelves and such...I agree that some of these may contribute to the flood myths of the various societies that have them.
"There have been plenty of really big glacier-burst floods, and transgressions of oceans on continental shelves and such...I agree that some of these may contribute to the flood myths of the various societies that have them."
True, but it's easy to see how the legends of primitive societies can morph the second idea into the first.