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Big Ben is a volcanic massif that dominates the geography of Heard Island. It is a composite cone with a diameter of approximately 25 kilometres. Its highest peak is Mawson Peak, one of only two active volcanoes in Australian territory which is 2,745 m above sea level. Much of it is covered by ice, including 12 major glaciers which descend from Big Ben to the sea.

A smaller volcanic headland, the Laurens Peninsula, extends approximately 10 km to the northwest, created by a separate volcano, Mount Dixon; its highest point is Anzac Peak, at 715 m.

References

• LeMasurier, W. E. (1990). Volcanoes of the Antarctic Plate and Southern Oceans. American Geophysical Union. pp. 512 pp. ISBN 0-87590-172-7. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)

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External links

• Location and history of Heard Island

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53°06′30″S 73°31′30″E / 53.10833°S 73.52500°E / -53.10833; 73.52500

• Antarctica geography stubs
• Active volcanoes
• Complex volcanoes
• Volcanoes of Australia
• Volcanoes of the Southern Ocean