Stratification in Tibet Sediment (IMAGE) University of Rochester Caption Stratification in Tibet sediment. Climate variations are reflected in color variations with the red sediment typically indicating a wetter climate and the white indicating a drier climate. "You can literally walk up time as you sample the sediment," Garzione says. Credit Image credit/Qingquan Meng 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.