Preserved Wood (image) Earth Institute at Columbia University Share Print E-Mail Caption A cross section of a tree trunk found in Loch Gamnha, Cairngorm Mountains. Credit Courtesy Tree Ring Lab, University of St. Andrews. Usage Restrictions Credit must be given, Share Print E-Mail 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.