Drilling in Ice (IMAGE) University of Colorado at Boulder Caption An ice auger is used to drill a borehole through the proglacial Isortoq River seasonal ice cover. Credit Lincoln Pitcher 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.