Lachniet with stalagmite (1) (IMAGE) University of Nevada, Las Vegas Caption UNLV professor Matthew Lachniet holds a stalagmite retrieved from a Grand Canyon cave. Credit Laura Sangaila Usage Restrictions please credit the photographer 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.