Screenshot of Animation 1 (IMAGE) Geological Society of America Caption Modeled outburst flood during ice-sheet retreat, routed to the outlet of Petermann Glacier. The animation covers 22,000 simulated years, and pauses to highlight a large ice-dammed proglacial lake during the deglaciation. https://www.geosociety.org/images/GSA/media/2020/bak20_petermann.gif Credit Credit: B Keisling Usage Restrictions Credit: B Keisling 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.