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Qeqertaq Avannarleq (Greenlandic for 'the northernmost island') is an unofficial name of what was thought to be a previously uncharted island in the Arctic Ocean, discovered in August 2021. It is within the Arctic Circle, off of the northern tip of Greenland, and consists primarily of seabed mud and moraine, an accumulation of unconsolidated debris left behind by glaciers. One theory as to its creation was that it was formed relatively recently, during a violent storm.