Sediment samples (IMAGE) Syracuse University Caption Bhattacharya (right) samples sediment from a dry lakebed in Nevada, which is used to provide further evidence of monsoon changes during the Pliocene. Credit Syracuse University Usage Restrictions None License Original 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.