re: scientific explanations please.......
Moeraki Boulders. I visited this place quite a few times as a kid. Very cool place, expecially at night in the moonlight, as if you were marooned on an alien planet.
Scientific explanation:
Scientists explain the boulders as septarian concretions formed about 65 million years ago. Crystallization of calcium and carbonates around charged particles in muddy undersea sediments gradually formed the boulders in a process taking as long as four million years. The soft mudstone containing the boulders was raised from the seabed around 15 million years ago and sea erosion is exposing the erosion-resistant boulders.