Figure 3 (IMAGE) Science China Press Caption Illustration of U-Pb dating analysis and results. (a) CL images; (b), (c) concordia plots of the rhyolite; (d) the weighted mean ages of the rhyolite. Credit ©Science China Press Usage Restrictions Use with credit. 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.