Donald Sparks Honored by EGU (IMAGE) University of Delaware Caption UD Professor Donald Sparks has received the Duchaufour Medal given by the European Geosciences Union for distinguished contributions to soil science. Credit Photo illustration by Jeffrey C. Chase 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.