X-ray of Coral Skeleton Core (image) American University Share Print E-Mail Caption X-ray photograph of a coral skeleton core, split in half, showing annual growth layers made up of a light and dark band. X-ray shows the top half of the skeleton core. Credit Kiho Kim, Ph.D. Usage Restrictions Proper credit Share Print E-Mail 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.