Track of T-3 from 1962-1974 (IMAGE) U.S. Geological Survey Caption Track of drifting T-3 Ice Island around the Western Arctic Ocean from 1962 to 1974 with the 356 USGS heat flow points superposed as color-coded circles. The location of the aerial photograph taken in Spring 1967 is indicated by the pink box. Credit C. Ruppel, USGS 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.