Late Quaternary environmental changes in Marguerite Bay, Antarctic Peninsula, inferred from lake sediments and raised beaches

► Earliest onset of deglaciation at 28,830 cal yr BP. ► Ice sheet in inner Marguerite Bay <140 m from 21,110 cal yr BP. ► Holocene deglaciation from 10,610 cal yr BP. ► Relative sea level high stands at 40.79 m and 40.55 m after 9000 cal yr BP. ► Warming 6200-2030; Neoglacial from 2630; Late Holocene warming from 410 cal yr BP.