Ancient Clams (IMAGE) Syracuse University Caption Ivany's research includes 54-million-year-old clams, preserved in exposed rocks on the banks of Alabama's Tombigbee River. Credit Provided Usage Restrictions None 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.