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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]
McMurdo Station briefly gained global notice when an anti-war protest took place on February 15, 2003. During the rally, about 50 scientists and station personnel gathered to protest against the coming invasion of Iraq by the United States. McMurdo Station was the only Antarctic location to hold such a rally. [25]
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 ...
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 .
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.
Scientists are tracking changes at the giant supervolcano that lies under Yellowstone National Park, but they say there's no need to worry at the moment. “The western part of the Yellowstone ...
At the time of the Cambrian explosion, as multi-cellular became commonplace, Arkansas was primarily flooded by rivers and a shallow marine environment.In the Ozark region, calcareous, quartzose sand and clay deposited, while the Ouachita area witnessed the formation of alternating layers of sand, clay, silt and small amounts of lime mud.
Among these volcanoes is Shield Nunatak southwest from Mount Melbourne, [54] a subglacial volcano, now exposed, that may have formed during the last 21,000 to 17,000 years. [55] The Cape Washington ridge consists mostly of lava, including pillow lava, overlaid by scoria cones, [ 19 ] and is the remnant of a shield volcano. [ 56 ]