It was plotted from air photos by the Third German Antarctic Expedition (1938–39), mapped from surveys and air photos by the Sixth Norwegian Antarctic Expedition (1956–60), and because of its shape named Fenriskjeften (Fenrir's jaw), after the wolf in Norse mythology.
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It was mapped from surveys and air photos by the Sixth Norwegian Antarctic Expedition (1956–60) and named Fenristunga (Fenrir's tongue) in association with Fenriskjeften Mountain.