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Heard Island and McDonald Islands in the Southern Ocean A map of Heard Island and McDonald Islands. Heard Island, by far the largest of the group, is a 368-square-kilometre (142 sq mi) mountainous island covered by 41 glaciers [21] (the island is 80% covered with ice [1]) and dominated by the Big Ben massif.
The McDonald Islands (53°3′34.9″S 72°35′32.2″E) is an uninhabited archipelago in the southern Indian Ocean in the vicinity of Heard Island (53°06′S 73°31′E). Together with Heard Island, they make up the Australian external territory of Heard Island and McDonald Islands. The McDonald Islands are the emergent peaks of submarine ...
The McDonald Islands, of volcanic origin, are ice free. They are located 44 kilometres (27 mi) to the west of Heard Island at 53°02′20″S 72°36′04″E. The islands are small and rocky. In 1980, they consisted of McDonald Island (186 metres (610 ft) high), Flat Island (55 metres (180 ft) high) and Meyer Rock (170 metres (560 ft) high).
Big Ben (previously known as Big Ben Peak, Old Ben Mountain, Emperor William Peak and Kaiser Wilhelm-Berg) [1] is a volcanic massif that dominates the geography of Heard Island in the southern Indian Ocean. It is a stratovolcano with a diameter of about 25 km (16 mi). Its highest point is Mawson Peak, which is 2,745 m (9,006 ft) above sea level.
Abbotsmith Glacier. 53°06′S 73°24′E. A well-defined glacier, 3 nautical miles (5.6 km; 3.5 mi) long, descending from the ice-covered west slopes of Big Ben to the west side of Heard Island between Walsh Bluff and Henderson Bluff. Surveyed in 1948 by the Australian National Antarctic Research Expeditions (ANARE) who named it for John ...
This is a list of the mammal species recorded in Heard Island and McDonald Islands. There are approximately 29 mammal species in Heard Island and McDonald Islands. [1] [2] The following tags are used to highlight each species' conservation status as assessed by the International Union for Conservation of Nature: [3] EX. Extinct.
Mawson Peak is an active volcanic summit of the Big Ben massif on Heard Island, an external Australian territory in the Indian Ocean.. With an elevation of 2,745 metres (9,006 ft), it is the third highest peak in any state, territory or claimed territory of Australia, [3] higher than the 2,228-metre (7,310 ft) Mount Kosciuszko, and surpassed only by the 3,490-metre (11,450 ft) Mount McClintock ...
The Heard Island glaciers covered 79 percent of Heard Island itself, in 1947, covering 288 km 2; by 1988, this had decreased by 11 percent to 257 km 2. [1] The glaciers fall under the Antarctic Environmental Gradient, which spans 30 degrees of latitude and includes a range of macro-climatic zones from cool temperate islands to the frigid and arid Antarctic continent. [2]