Soil Cores with Old Carbon (IMAGE) University of Guelph Caption Soil cores showing accumulation of old carbon taken from one of the Northwest Territories field sites. Credit Merritt Turetsky 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.