This comes courtesy of George Howard at https://cosmictusk.com/oldie-goodie-carolina-coast-uk-catastrophically-i… … this is essentially a report from 2012 – but interesting never the less. Both the coasts of Carlina and Cornwall were inundated by a tsunami wave around 1000AD. According to Mike Baillie the anomaly is dated by tree rings to 1014AD, the same year in which the Viking stronghold at what is now Dublin, was overrun by a native Irish coalition. However, the wave arrived after the battle but it would have helped in dispersing the Scandinavians across the Irish Sea, where they settled on the Dee estuary. See also http://earthguide.ucsd.edu/seafloorscience/slopes/slopes_slides.html …
Once again, mainstream are loathe to reject the idea of an impact or a tsunami wave from a meteor falling into the Atlantic. There has been a concerted attempt, it would see, to refute the work of Dallas Abbot. In this missive, the landscape damage is attributed to a hurricane – running up the Hudson valley. Dallas Abbot was unique in that she has investigated this aspect of earth sciences. See for example www.livescience.com/10203-66-foot-waves-hit-york-ancient-asteroid-splash… … and www.hudsonriver.org/ls/reports/Reports_of_the_Tibor_T_Polgar_Fellowship_… which describes tsunami signatures in Long Island Sound and the Hudson Valley. The new research has found the southern Outer Bank also collapsed – and claim modern global warming might do the same, on the theory that warming causes more hurricanes. This may have been a sop in order to get published, possibly a recommendation by the publisher or a referee. Certainly, adding such a line to their work would have aided its acceptance by peer review. We can ignore that and take note of the fact they do not deny a tsunami wave may have been responsible – although opting for a hurricane would be the safe way to present their findings. Abbot was able to link her tsunami wave to a similar big wave striking the coasts of Britain and Ireland at the same point in time. William of Malmesbury describes a tidal wave that grew to an astonishing size, in 1014AD. It submerged whole villages and penetrated deep inland, overwhelming the inhabitants of villages. In addition, the Anglo Saxon Chronicle states that in 1014 came the great sea flood – which spread wide over the land. It affected not just the est Country, it would seem, but as far afield as Kent, Sussex, and Hampshire, running through the Channel. It also killed many people in low lying Netherlands, and possibly in neighbouring France and Germany. At Mounts Bay near Penzance in Cornwall, the wave laid down a layer of sand and organic deposits.