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The McMurdo Volcanic Group is a large group of Cenozoic volcanic rocks in the western Ross Sea and central Transantarctic Mountains areas of Antarctica. [1] It is one of the largest provinces of alkaline volcanism in the world, having formed as a result of continental rifting along the West Antarctic Rift System .
The giant volcano sponge (Anoxycalyx joubini) is a species of Antarctic sponge. [1] It is one of the largest sponges in the world which can grow up to a diameter of 1.5 metres (5 feet) and 1.95 metres (6.5 feet) in height. [2] The species may have an extremely long lifespan, with estimates of up to 15,000 years. [3]
The active volcano Mount Erebus and the dormant Mount Melbourne, both in the continent's interior, each host a fumarole. Two fumaroles also exist on the subantarctic islands, one caused by a dormant volcano on Deception Island in the South Shetland Islands and one on the South Sandwich Islands. The fumarole on Deception Island also supports ...
McMurdo Sound experiences katabatic winds from the Antarctic polar plateau. McMurdo Sound freezes over with sea ice about 3 metres (9.8 ft) thick during the winter. During the austral summer when the pack ice breaks up, wind and currents may push the ice northward into the Ross Sea, stirring up cold bottom currents that spill into the ocean basins.
“The western part of the Yellowstone caldera is waning,” said Ninfa Bennington, a volcano geophysicist with the U.S. Geological Survey and lead author on a paper in Wednesday’s edition of ...
Ross Island is an island in Antarctica lying on the east side of McMurdo Sound and extending 43 nautical miles (80 km; 49 mi) from Cape Bird in the north to Cape Armitage in the south, and a similar distance from Cape Royds in the west to Cape Crozier in the east. The island is entirely volcanic.
The island is composed of several overlapping shield volcanoes that form part of the Hallett Volcanic Province of the McMurdo Volcanic Group. [2] A 5 km (3.1 mi) wide and 700 m (2,300 ft) deep caldera called the Hawkes Heights can be found on the south end of the island.
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