Burrows in the crater (IMAGE) Geological Society of America Caption A sketch of the Chicxulub crater under the sea with the deep seafloor showing the different types of observed bioturbations (Ichnogenera), with photos from the studied cores. Courtesy Francisco J. Rodríguez-Tovar. Credit Francisco J. Rodríguez-Tovar. Usage Restrictions Credit Francisco J. Rodríguez-Tovar. 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.