Peridotite (IMAGE) University of Granada Caption Peridotite from the deep mantle (green) enclosed in lava (black) from a Patagonian volcano, which was found by the researchers. Credit UGR 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.