Ice Layers (image) University of Washington Share Print E-Mail Caption Left: The Allan Hills Blue Ice Area in Antarctica, showing the research camp, the 2.7-million-year old ice and the proposed drilling site. The black line marks the track of the radar profile on the other panel. Right: Radar reflections from layers with different chemistry. The red dashed lines show two layers of volcanic ash deposits of known age. The black dashed line is the proposed core site. Credit Laura Kehrl/University of Washington Usage Restrictions With credit 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.