Microspherules 2 (IMAGE) University College London Caption Microscope image of silica droplets, or microspherules, found in the rock, this time cropped to be a landscape image and with a plain black background. Credit Natalie Cheng / Bridget Wade Usage Restrictions To be used only in relation to this study and with credit 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.