Mt. Bird is a Basaltic Shield. Coulman Island is several overlapping shield volcanoes. One of the most impressive sites on Coulman Island is the Coulman Caldera. It is 3 miles wide and 2,300 ft. deep. Coulman Island is 7.2 million years old.
Mt. Discovery is a Central volcano.
Mt. Erebus is an active volcano on Ross Island. Mt. Harcourt is another strato volcano. Mt. Terror is a very large basaltic Shield. Volcanoes such as these provide interesting opportunities for geological research. Some volcanoes erupt all the time.