Archeologists have uncovered evidence of pre-farming people living in the Burren more than 6,000 years ago — one of the oldest habitations ever unearthed in Ireland.
Radiocarbon dating of a shellfish midden on Fanore Beach in north Clare have revealed it to be at least 6,000 years old — hundreds of years older than the nearby Poulnabrone dolmen........
irishexaminer.com/ireland/6000-year-old-settlement-poses-tsunami-mystery-193230.html
Mibbe it was the outwash of the one which hit Orkney 7,000 years ago.
bbc.co.uk/coast/programmes3/01_shetland_orkney.shtml
Caused by an huge underwater landslip off the Norwegian shelf or sumhin...