The sandstone of the Altar Stone was formed from these lake sediments. This showed that rocks transported from the Orcadian Basin could be transported to a region off the east coast of England called Dogger Bank. Which suggests they might have deliberately chosen the Altar Stone for some of its attributes. It transitioned from a land bridge connecting Europe to Britain, to a small island, where the Altar Stone stood. Therefore, the Altar Stone would have had to be transported to at least one intermediate site before finally being incorporated into Stonehenge.