Bioturbated soil in Puerto Rico (IMAGE) Geological Society of America Caption Puerto Rican soils with upper ~30cm highly bioturbated from earthworms. Credit Credit: Adrian Wackett Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.