Sunday, 4 November 2012
Saunton and Croyde
We are not sure how many erratics there may be on the coasts of Devon and Cornwall -- at least 15 are recorded in the literature, and because some of them are sealed beneath periglacial and other deposits dating (we suppose) from the Devensian cold stage, we can be sure that there are many more waiting to be discovered as the soft sediments on the coast are eroded back by wave action at times of high tides and storm waves.
As I have indicated before, I am not terribly bothered whether these boulders were carried by icebergs or sea ice, or by a glacier moving onshore from the Bristol Channel. Because there is till in a few locations on these coasts, my preference is for direct glacial action. But I also think that there must have been substantial isostatic depression in this region during the Anglian Glaciation -- and that means a lot of ice over the counties of Devon, Cornwall and Somerset -- and maybe Wiltshire too.