what was above water goes below and what is below rises again to the surface.
Thats just downright non-science.
I dont know where to start refuting that nonsense, suffice to say, even someone without much understanding of the universe would see this as just daft.
The flipping poles are the magnetic ones, geography doesnt change, the world doesnt suddenly flip upside down.
Geomagnetic reversal - Wikipedia
And the tectonics required to submerge everything above land and rise the ocean floors, trenches and sea's/lakes would just be against all known laws of physics.
The andes didnt rise in one day, though in geological time they have risen quite fast.
They are force up because they are the crumpled edge of the South American continental plate as the pacific plate pushes into the SA plate and is forced under.
Your right in that at one point the sediments that were at a bottom of a sea are now sedementary rocks at the top of mountains, this is what occurs when rock from low down is forced up as an edge of a plate crumples. Those fossils are thousands if not millinos of years old, more then enough time for the rocks they are formed in to rise over time. there at the "top" of the mountains because the rock that was above them have been weathered away by wind and water over a long time.
This is why the andes arent even taller.
This is why ancient moutain chains that were once like the himalaya's are now mere broken hills.
Like most geological processes the time it took would seem an eternity to humans.
Andes - Wikipedia
Many experiements and studies have provided plenty of means by how the Egyptians built the pyramids and moved about the large rocks.
One of my favorate is using shapped wood to turn the rock into a glorified double-wheel, by placing shaped wooden peices on both ends to turn both ends into wheels.
Humans have acheived suprising things, building the pyramids is as fantastic as breaking the human genome, but not more difficult, especially for a motivated group of people.
Modern engineering has enabled us to build the most bizzare structures, a pyramid is hardly an engineering nightmare, its a very stable shape.
We dont have all the awnsers but thats no excuse to disregard the ones we do have.