Cosmogenic nuclides constrain surface fluctuations of an East Antarctic outlet glacier since the Pliocene

- Changes at the marine ice margin extended upstream toward the ice sheet interior.
- Glacier was thicker than present for ∼75-90% of each glacial-interglacial cycle.
- The ice surface was >200 m higher during Pliocene and Pleistocene glacial periods.
- Relative duration of deglaciation was similar in both the Pliocene and Pleistocene.