The sound is structurally a
fjord forming a channel that runs roughly westwards between the southern shore of
Holm Land by
Mallemuk Mountain to the north and
Cape H. N. Andersen, at the NE end of
Hovgaard Island to the south. Its minimum width is 4 km.
Lynn Island is located about from the mouth of the Dijmphna Sound where it bends in a NE/SW direction. At
Cape Marie Dijmphna, the
Hekla Sound branches to the NW separating the shore of Lynn Island from the southwestern shore of Holm Land to the north and —bending roughly southward— with the
Skallingen shore in the Greenland mainland to the west, joining again the Dijmphna Sound. Meanwhile, the sound bends further southward west of Hovgaard Island until it meets the
Spalte Glacier flowing from the
Nioghalvfjerd Fjord in the southwest.
Cape Adolf Jensen lies on the southeastern side of the southern mouth of the sound. ==See also==