Massive accumulations of gypsum (IMAGE) University of South Florida Caption Massive accumulations of gypsum and other sulfates in the La Corona lava tube system in Lanzarote, Spain. Credit Bogdan Onac Usage Restrictions NA License Original 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.