Collecting Samples (IMAGE) University of Texas at Austin Caption From left: Tomas Capaldi, Chelsea Mackaman-Lofland, and Professor Brian Horton collecting sand sample from the Lower Rio Mendoza. Credit Ryan McKenzie Usage Restrictions credit 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.