Also, we may not know the shape of the world.
And what about that ice-wall.
Is it real? Is it all the way around?
If part of it melts... what?
And what if it is hold a sea back?
What if the firmament is a sea with more water?
And there is an exchange of waters.
You know, like God changing the water in a fish tank.
Every fish tank, no matter how good you clean it needs to have its water changed.
I do not know what the shape of the world is, and so will not rule out anything.
And damned if we do not pay attention to real archaeology. (have to believe we came down from the trees... 6000 years ago)
Nor do we pay attention to real cycles.
People have been studying the seismic shivers of the world for millennia. The understanding of the reflection, refraction, and rate of travel of those vibrations has become quite advanced lately. The generally spherical shape of the Earth is confirmed by seismic research, as well as much else.
You could find out what the shape of the world is fairly easily, if you discarded false hypotheses. That is the method I recommend.