A Zircon Crystal from the Sudbury Crater (IMAGE) Trinity College Dublin Caption Scanning electron microscope picture of a zircon crystal from the Sudbury crater. Credit Gavin Kenny, Trinity College Dublin. Usage Restrictions None 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.