Subglacial volcanoes

Gaussberg (or Schwarzen Berg, Mount Gauss) is a extinct volcanic cone in East Antarctica fronting on Davis Sea immediately west of Posadowsky Glacier. It is ice-free and conical in nature, having formed subglacially about 55,000 years ago. The current edifice is thought to be the remains of a once-larger mountain that has been reduced by glacial and subaerial erosion. The volcano has produced lamproite magmas, and is the youngest volcano to have produced such magmas on Earth.

volcanic form

Nunatak group in Palmer Land, Antarctica