Rock Salt Tells Story of Ancient Earth (IMAGE) Princeton University Caption A sample of 2-billion-year-old salt (pink-white recrystallized halite) with embedded fragments of calcium sulfate from a geological drill core in Russian Karelia. Credit Photo by Aivo Lepland, Geological Survey of Norway; courtesy of Science/AAAS Usage Restrictions Photo by Aivo Lepland, Geological Survey of Norway; courtesy of Science/AAAS 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.