300 year-old tree rings revealed (IMAGE) American Geophysical Union Caption A slice of larix (larch) driftwood collected from Phippsøya, The Seven Islands, matched to an origin along the Lena River in Russia in the 1700s. The slice was sanded, revealing the preserved rings. Credit Georgia Hole 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.