Inception of an Ice Age (2 of 3) (IMAGE) UiT The Arctic University of Norway Caption Time slices from the model show the development of the ice sheet. It starts out as three independent, distinct ice masses: Celtic, Fennoscandian and Barents Sea. These eventually merge to form one large ice sheet complex. Illustrations: Henry Patton. Credit Henry Patton Usage Restrictions Attribution 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.