Tiny zircon crystals (IMAGE) University of Helsinki Caption Dating of tiny zircon crystals reveal the age of volcanic rocks in the Karoo province. Credit Arto Luttinen Usage Restrictions Free re-use of this Multimedia Content in news coverage 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.