SEDIMENT 2 (IMAGE) Rice University Caption Rice University researchers Hongbo Ma, left, and Jeffrey Nittrouer, an assistant professor of Earth, environmental and planetary sciences, led a study that found a sharp break in the transport mechanism characteristics of sand and silt in riverbeds. Credit Jeff Fitlow/Rice University 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.