Figure 1 (IMAGE) Geological Society of America Caption Figure 1: Photo showing plastic particles and fragments occurred on the upstream-facing side of a large boulder. Upstream is on the right side. A higher-resolution photo is available. Credit Guangfa Zhong and Xiaotong Peng Usage Restrictions Credit Guangfa Zhong and Xiaotong Peng 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.