Not all of them were buried. You would think there would be a massively disturbed global sediment layer around the world if there was a global flood. There is no such layer though.
I think the ones near the "event" were burried while the ones further or those protected by mountains have simply been destroyed except for the pyramids because of their shape.
There is no further off, and closer, if the flood was global.it should have happened everywhere is Everest was below water. So it should be all, or not.
Their shape offers no protection, except against gravity.
It absolutely offers protection. Water pressure on pyramidal shape would be inferior than applied on a perpandicular wall.
As I said, from gravity. Which is irrelevant. The world was not suddenly crushed uned a new ocean. Oh wait, you are going to claim that coal and oil appeared suddenly during the flood.
No I'm saying that water somehow moved accross lands coming from the oceans. The water movement was horizontal, not vertical.
That is an even worse idea. You are saying water decided to flow up hill out of the oceans then. God did it is the only way to explain such nonsense.
