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Gersemia antarctica (a soft coral) growing the water near McMurdo. The giant volcano sea sponge (Anoxycalyx joubini) is estimated to live between 6 thousand to up to 40 thousand years, and grow up to 1.5 meters (5 feet) in diameter and 1.95 meters (6.5 feet) high. [79]
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 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 largest is the whitish or dull yellowish Anoxycalyx joubini, sometimes called the giant volcano sponge in reference to its shape. It can reach a height of 2 m (6.5 ft) and is an important habitat for several smaller organisms.
In those events, volcanic ash reached from the Pacific ocean to Canada to Mexico. They tend to reoccur about every 600,000 to 800,000 years , according to the U.S. Geological Survey. The most ...
Volcanic activity occurs at the rift and includes the McMurdo Volcanic Group, [34] a 2,000 kilometres (1,200 mi) long chain of volcanoes in Victoria Land. This volcanic group has erupted alkaline lavas during the course of the Cenozoic. It is subdivided into three provinces, the Hallett, the Melbourne and the Erebus province; Mount Morning is ...
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 volcano sponge consists of a pale yellow to light green-grey hemispherical head on a conical or umbrella-like expansion that is embedded in the sand. [2] [3] It tends to grow up to 30 mm (1.2 in) tall and have a base with a circumference of up to 50 mm (2.0 in). [2] The head is rough and covered in lines of projecting spicules. These ...