Uplifted Coral (IMAGE) University of Texas at Austin Caption Weathering and moss can make uplifted coral blend into the background by making them look like rocks. Underneath the exterior layer the coral remains a bright white from calcium carbonate, the primary compound of coral skeletons. Credit Kaustubh Thirumalai 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.