Southeastern Tibet is one of the most glaciated regions on the Tibetan Plateau both at present and during the Quaternary. Numerical dating of glacial deposits has allowed the establishment of a provisional chronology of Quaternary glacial fluctuations in this region, with the oldest glaciation (Guxiang Glaciation) occurring in marine oxygen isotope stage 6 (MIS-6). However, glaciations predating MIS-6 have been identified at many locations on the Tibetan Plateau and its surrounding mountains, posing the question: as a major glaciation center both at present and during the Quaternary, did a glaciation prior to MIS-6 ever occur in southeastern Tibet?