Giesecke Glacier () is a glacier in Avannaata municipality in northwestern Greenland. Its outflow is split in the center by a nunatak. Through two tongues it drains the Greenland ice sheet westwards into Kangerlussuaq Icefjord.Upernavik, Saga Map, Tage Schjøtt, 1992 The northern tongue () reaches the fjord at . The southern tongue () reaches the fjord at .
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