Sediment Washing (IMAGE) University of New South Wales Caption Washing of St Bathans sediments through sieves in Manuherikia River in New Zealand to collect fossil bones and teeth of an ancient burrowing bat. Credit Credit: Vanesa De Pietri. Usage Restrictions With appropriate credit and caption 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.