Diatom Preserved in Lake Sediments (IMAGE) Queen's University Caption This is a scanning electron micrograph image of an Aulacoseira diatom, preserved in the sediments of Lake CF8 on Baffin Island, Arctic Canada. Credit Cheryl Wilson and Alexander Wolfe 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.