Sediment Core Sample From Swallow Lagoon (IMAGE) University of Adelaide Caption This is a sediment core sample from Swallow Lagoon. Credit John Tibby, University of Adelaide Usage Restrictions Only for use in relation to this story. License Licensed content 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.