Ediacaran Carbonate Rocks (IMAGE) Arizona State University Caption This is Zhang sampling Ediacaran carbonate rocks in Three Gorges area, Hubei Province), People's Republic of China. Credit ASU 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.