In a word, balast. "Blast the balast" that was Noahs last words as he walked up the gang plank suffering the mother of all hernias.If it wasn't for those stones and having to make them oblong instead of spherical he could have put his feet up months before it rained.You see he didn't want any of the rolling stones below decks because they would have played havoc with the arks internal guidance system.So he hued them for months and called them his stone henge.He fitted a couple to the ark door ,God told him to make sure the door had a couple of good henges on it, Noah was also hearing impaired.
While the ark was floating over the south of England God told Noah to get rid of the balast and Wiltshire copped for the lot and ended up with the famous stone circle.Which solves another mystery.
Any other query?