The cross-section of multibeam data (IMAGE) Flinders University Caption The cross-section of multibeam data of the ENE wonky hole (A–B) shows how the acoustic signal was able to achieve some measurements underneath the lip of the feature by angling the sensor. (C) A geological sample was collected from the floor of the depression by divers. (D) Shows a diver swimming alongside the perimeter of the exterior ‘visor’. Credit Professor Jonathan Benjamin at Flinders University. Usage Restrictions Credit: Professor Jonathan Benjamin at Flinders University. License Original 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.