The end of the ice age would have had two appreciable effects on water levels. One, is that the ice went somewhere. The other, is that the huge amount of weig

The end of the ice age would have had two appreciable effects on water levels. One, is that the ice went somewhere. The other, is that the huge amount of weight being relieved from the land actually caused land masses to move[0]. In the example I'm most familiar with, the island of Great Britain essentially see-saw'd. Relieving the northern half of the island of this unimaginably massive weight caused the northern end of the island to rise, and the southern end of the island to sink reciprocally. So even without glacial melt to content with, some areas that were low-lying during the ice-age would have become submerged post-ice-age. The example I find most fascinating (I'm British, so still using GB & locale as examples) is "Doggerland"[1] - the theory that what is today an underwater topology named Dogger Bank, was previous an island, and before that the land bridge between GB and the continent. There's a strong chance there's prehistoric archeology to be found in the middle of the North Sea. Yes, sea levels have moved before - as part of one of the largest and most defining geological events in human history. [0] https://en.wikipedia.org/wiki/Post-glacial_rebound https://en.wikipedia.org/wiki/Post-glacial_rebound [1] https://en.wikipedia.org/wiki/Doggerland https://en.wikipedia.org/wiki/Doggerland (I don't want to de-stress point 1, the ice went somewhere. There's just little to expand on.)