Assuming a Biblical timeline, there were no oceans pre-deluge. The so-called “fountains of the great deep” would not contain salt water, therefore it came from outside the system.
Also under these assumptions, derived from Biblical descriptions, the climate was stable and verging upon tropical, so icebergs were not part of the equation due to that alone. Not to mention, there were no large bodies of surface water or even rain/snow required to form icebergs.
So, if this is to be taken as some sort of effect from the Biblical deluge, it occurred many years afterward. A very significant geological disturbance of some kind would be necessary to break off huge sheets of the polar icecap and send them scraping across the ocean floor and eventually adrift, I’d imagine.
The earth was formless and void, and darkness was over the surface of the deep, and the Spirit of God was moving over the surface of the waters. -Genesis 1:2
Are we to assume these waters did not constitute one or more oceans?
” In the Days of Pelegg, was the was the world divided...”Genesis...just a quick thought.
Pretty sure there were oceans before the flood.
The debatable variance is in where the oceans were located and how deep they were.