Cover -- Caves and Karst Across Time (IMAGE) Geological Society of America Caption Gothic Palace forms in Lehman Cave, Great Basin National Monument, Nevada, USA. Credit Photo copyright 2008 by Hilton Freed. Usage Restrictions Credit: Photo copyright 2008 by Hilton Freed. Cover design by The Geological Society of America. 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.