I came across this fine photo of the Shebbear Erratic, which lies on the village green. Shebbear is in Devon, about 20 km inland from the west coast and about 15 km from the sea in Bideford Bay.
I've not seen an accurate description of the stone's geology, and it is variously described as being made of quartz (highly unlikely) or of a pinkish granite -- whatever it is, it is not local, and is therefore an erratic.
According to legend, it is the "Devil's Stone" -- and it has to be turned over at 8 pm on November 5th every year, in order to keep the Devil at bay. Hence the ceremony going on in the photo.
It's interesting that this erratic (weighing about a tonne) is not far from an area on the Devon coast where glacial erratics are abundant -- the big erratics at Croyde and Saunton are of course very famous. (Two of them are shown below.) There are nine of them in accessible places along the shoreline, trapped beneath later deposits. There is also till at Fremington Quay and other localities nearby. Traditionally, geomorphologists prefer to think that the erratics were emplaced by floating ice -- a theory which I do not accept, for reasons enumerated in this blog on a number of previous occasions. On the other hand, it's accepted that the till deposits were emplaced by Irish Sea ice pressing against the coastline but not progressing far inland. We know that the Irish Sea Glacier DID progress far inland across the Somerset Levels, and to me the presence of the Shebbear Erratic indicates that the ice was thick enough, and with enough force behind it, to push well inland across the west Devon countryside.......
For other records of "stray stones" see this post: