Suggested bluestone entrainment zone

This is a suggestion for the alignment of the "entrainment zone" along which erratics seem to have been entrained into the ice prior to transportation towards Somerset and the Salisbury Plain. Note that the strip (a probable contact zone between Irish Sea Ice and Welsh Ice) is only 2-3 km wide. From what the geologists are telling us, all of the likely sites from which erratics have been picked up by the ice are within this strip. I'll try to create a map which shows exactly where these known sites are. Watch this space.......