Simplified Map (IMAGE) Science China Press Caption This is a simplified map showing the spatial distribution of the representative end member or eclogite gravels, high-Si phengites, and Triassic zircons that were exhumated in the source area. This map was organized according to provenance analysis results of stratigraphic sections in the Hefei basin, which demonstrate the depth of exhumation increasing from west to east, the unroofing ages of the UHP and HP metamorphic rocks changing from Early Jurassic to Late Jurassic westward, and eastward increasing exhumation rate in the Dabie orogen during the Jurassic. Credit ©Science China Press 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.