Aerial view of the Chaihuín tidal marsh (IMAGE) Northumbria University Caption Aerial view of the Chaihuín tidal marsh – site of the discovery of new geological evidence for a previously unreported historical tsunami. Credit Diego Aedo Usage Restrictions No restrictions. License CC0 Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.