In recent years there has been growing concern about the potentially irreversible retreat of the West Antarctic Ice Sheet and Thwaites Glacier in particular causing deglaciation of large parts of the ice sheet and leading to substantial sea-level rise. This study demonstrates that a site between Thwaites and Pope glaciers has undergone ice-sheet thinning and subsequent thickening in the past. The results are of importance for a better understanding of future threats to the stability of the West Antarctic ice sheet, and the ice-sheet evolution in the Amundsen sector over the late Holocene.