There's an island. Maybe it is a continent, maybe not. I am not sure and that is why I need your help.
If the size of my world is equal to Earth's, what landmass size would it take to drop the sea level by the aforementioned amount if it were to, say, lift up into outer space?
I know it sounds silly, and is unprecedented, but a huge part of my mythos revolves around the discovery of new lands as a result of receding tides and more extensive coastlines.
I hired a cartographer who pointed out that by doing this, I would weaken the integrity of oceanic crust, kind of like thinning the skin of a balloon, potentially leading to an extinction-level event later down the road. Would there not be potential for a new island or chain of islands to lift up as a result of the magma expulsions? Would this heat the temperature of the world, poison the oceans, darken the sky with contaminants, etc.? I would appreciate input on anything.
I don't need any other explanations for why all of these events could be happen.