Doushantuo Formation (IMAGE) University of California - Riverside Caption The Ediacaran Doushantuo Formation and overlying Dengying Formation crop out in the background above the Yangtze River near Yichang city and the Three Gorges Dam, Hubei Province, China. Credit Chao Li, UC Riverside 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.