Late Glacial deglaciation of the Zackenberg area, NE Greenland

The Greenland Ice Sheet (GrIS) is a key component of the global climate system. However, our current understanding spatio-temporal oscillations and landscape transformation GrIS margins since last glacial cycle still incomplete. objective this work to study deglaciation Zackenberg Valley (74°N, 20°E), NE Greenland, origin derived landforms. Based on extensive fieldwork high-detail geomorphological mapping we identified different types landforms, from which those paraglacial were used understand processes driving regional environmental evolution. We applied cosmic-ray exposure (CRE) dating 32 samples taken erosive depositional landforms distributed across valley. Geomorphological evidence shows that >800-m-thick Late Quaternary glacier filled valleys fjords covered mountain summits. In subsequent phases, as ice thickness decreased, was limited interior valley, leaving several lateral moraines. started by ~13.7–12.5 ka also accelerated slope processes. Many blocks moraines remobilized fell, reaching valley floor where they thinning tongue; transforming it into debris-covered subsequently melted gradually. By ca. 10.5 ka, remnants disappeared floor, chronology similar observed in other sites Greenland. results must be considered studies, reinforcing need support CRE ages phases with paleoclimatic data sedimentary records.