Very interesting, could be a topic, hmm, maybe worth a search.
Semi-related sidebar:
In an article in the now-defunct “Strange” magazine, Vincent Gaddis recounted how a vessel charted and landed on an island in the southern Pacific (if memory serves, it was east of Africa), one of three smallish islands in a group. They landed to either hunt or butcher something (whales, seals, I forget) and didn’t think much of it.
There’s nothing there today.
Apparently the boulders sticking up were merely carried along in big icebergs, or some islands have subsequently sunk. S’cool.
...reminds me of Heyerdahl, expecting to find a small island somewhere in the Pacific as shown on an old map, to break the raft’s journey, and finding nothing but breakers crashing over a submerged reef.