Modeling Fault Development in Clay (IMAGE) University of Massachusetts Amherst Caption Cooke's UMass Amherst lab is one of only a handful worldwide to use a relatively new modeling technique that uses kaolin clay rather than sand to better understand the behavior of Earth's crust. Credit UMass Amherst 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.