Gulf of Mexico Coral (IMAGE) Louisiana State University Caption LSU doctoral student in biology Joanna Griffiths and professor Kristine DeLong stand behind a coral reef fossil from the Gulf of Mexico during the last interglacial period about 120,000 years ago. Credit Kristine DeLong 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.