Shatter Cones (image) Trinity College Dublin Share Print E-Mail Caption Shatter cones (pyramid-like structures) formed from the shock wave of the impact, and can be seen as that wave migrated through the rock from the bottom up. Credit Gavin Kenny, Trinity College Dublin. Usage Restrictions None 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.