Spherules (IMAGE) Geological Society of America Caption Spherule deposits on Gorgonilla Island. Credit: Hermann Bermúdez. Credit Hermann Bermúdez 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.