Vaughan team digging (IMAGE) American Society of Agronomy Caption Researchers work together to dig a soil pit in a slump block wetland in Poly Canyon along the central coast of California. Credit Karen Vaughan Usage Restrictions For use with this story only. 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.