I can look at the picture, do you see evidence of a body of water? I’d say there was water there at some point in time that caused erosion, like say perhaps a flood situation?
It appears to be cooled Pyroclastic flow. Lava weathers very slowly compared to everything around it.
But what I was getting to was that your statement implies that it is a boat and that it did float at some point. So seeing how it is not a boat when water was there last is irrelevant.
Butfrom what I have read it about the geology it was formed under water millions of years ago.
But I also need to explain that in no way do I discredit the concept of a flood. Geology around the world does indeed indicate a major flood event. But it doesn’t fit the timeline the Bible tries to claim. In fact the origin of the flood story was plagiarized from the Sumerian writings a thousand years earlier.