Microplastic Pellets from the Great Lakes Study (image) Geological Society of America Share Print E-Mail Caption Microplastic pellets from the Great Lakes study. The pellet study involved sampling of 66 beaches on each Great Lake over a two-week period in October 2018, with a total of 12,974 pellets on 660 square meters of beach. Credit Patricia Corcoran Usage Restrictions Credit: Patricia Corcoran. Share Print E-Mail 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.