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Gaussberg
Gaussberg (or Schwarzen Berg, Mount Gauss) is an extinct, high volcanic cone in East Antarctica fronting on Davis Sea immediately west of Posadowsky Glacier. It is ice-free and conical in nature, having formed subglacially about 55,000 years ago. The current edifice is thought to be the remains of a once-larger mountain that has been reduced by glacial and subaerial erosion. The volcano has produced lamproite magmas, and is the youngest volcano to have produced such magmas on Earth. Research history Discovered in February 1902 by the German Antarctic Expedition under Erich von Drygalski, who named it after his expedition ship which in 1902 remained stuck in ice for a year. The ship in turn was named in honour of the German mathematician Carl Friedrich Gauss. Drygalski observed the volcano with the help of a tethered balloon. Owing to its peculiar composition, Gaussberg has been intensively researched. The mountain was investigated in 1912 by the 1911-1914 Australasia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaussberg Drygalski 14157
Gaussberg (or Schwarzen Berg, Mount Gauss) is an extinct, high volcanic cone in East Antarctica fronting on Davis Sea immediately west of Posadowsky Glacier (Antarctica), Posadowsky Glacier. It is ice-free and conical in nature, having formed subglacial volcano, subglacially about 55,000 years ago. The current edifice is thought to be the remains of a once-larger mountain that has been reduced by glacial erosion, glacial and subaerial erosion. The volcano has produced lamproite magmas, and is the youngest volcano to have produced such magmas on Earth. Research history Discovered in February 1902 by the Gauss expedition, German Antarctic Expedition under Erich von Drygalski, who named it after his Gauss (ship), expedition ship which in 1902 remained stuck in ice for a year. The ship in turn was named in honour of the German mathematician Carl Friedrich Gauss. Drygalski observed the volcano with the help of a tethered balloon. Owing to its peculiar composition, Gaussberg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Volcanoes In Antarctica ...
This is a list of volcanoes in Antarctica. Table A 2017 study claimed to have found 138 volcanoes, of which 91 were previously unknown. Some volcanoes are entirely under the ice sheet. Unconfirmed volcanoes are not included in the table below. See also * Geology of Antarctica * Lists of volcanoes References Bibliography * Volcano World Web site {{Antarctica Antarctica * Volcanoes A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australasian Antarctic Expedition
The Australasian Antarctic Expedition was a 1911–1914 expedition headed by Douglas Mawson that explored the largely uncharted Antarctic coast due south of Australia. Mawson had been inspired to lead his own venture by his experiences on Ernest Shackleton's ''Nimrod'' expedition in 1907–1909. During its time in Antarctica, the expedition's sledging parties covered around of unexplored territory, while its ship, , navigated of unmapped coastline. Scientific activities included meteorological measurements, magnetic observations, an expansive oceanographic program, and the collection of many biological and geological samples, including the discovery of the first meteorite found in Antarctica. The expedition was the first to establish and maintain wireless contact between Antarctica and Australia. Another planned innovation – the use of an aircraft – was thwarted by an accident before the expedition sailed. The plane's fuselage was adapted to form a motorised sledge or "air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamproite
Lamproite is an ultrapotassic mantle-derived volcanic or subvolcanic rock. It has low CaO, Al2O3, Na2O, high K2O/Al2O3, a relatively high MgO content and extreme enrichment in incompatible elements. Lamproites are geographically widespread yet are volumetrically insignificant. Unlike kimberlites, which are found exclusively in Archaean cratons, lamproites are found in terrains of varying age, ranging from Archaean in Western Australia, to Palaeozoic and Mesozoic in southern Spain. They also vary widely in age, from Proterozoic to Pleistocene, the youngest known example from Gaussberg in Antarctica being 56,000 ± 5,000 years old. Lamproite volcanology is varied, with both diatreme styles and cinder cone or cone edifices known. Petrology Lamproites form from partially melted mantle at depths exceeding 150 km. The molten material is forced to the surface in volcanic pipes, bringing with it xenoliths and diamonds from the harzburgitic peridotite or eclogite mantle regi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Posadowsky Glacier (Antarctica)
Posadowsky Glacier (german: Posadowskygletscher, ) is a glacier about long, flowing north to Posadowsky Bay immediately east of Gaussberg. Posadowsky Bay is an open embayment, located just east of the West Ice Shelf and fronting on the Davis Sea in Kaiser Wilhelm II Land. Kaiser Wilhelm II Land is the part of East Antarctica lying between Cape Penck, at 87°43'E, and Cape Filchner, at 91°54'E, and is claimed by Australia as part of the Australian Antarctic Territory. Other notable geographic features in this area include Drygalski Island (), located 45 mi NNE of Cape Filchner in the Davis Sea, and Mirny Station (), a Russian scientific research station. Discovery and naming The glacier was observed in February 1902 from the summit of Gaussberg by the Gauss expedition under Erich von Drygalski. The U.S. Advisory Committee on Antarctic Names (US-ACAN) named the glacier after Drygalski's Posadowsky Bay in 1955 following studies of the aerial photographs taken by United State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gauss Expedition
The ''Gauss'' expedition of 1901–1903 (also known as the ''Deutsche Südpolar-Expedition 1901–1903)'' was the first German expedition to Antarctica. It was led by geologist Erich von Drygalski in the ship , named after the mathematician and physicist Carl Friedrich Gauss. Voyage Drygalski led the first German South Polar expedition with the ship ''Gauss'' to explore the unknown area of Antarctica lying south of the Kerguelen Islands. The expedition started from Kiel on 11 August 1901. Expedition A small party of the expedition was also stationed on the Kerguelen Islands, while the main party proceeded further south. Erich von Drygalski paid a brief call to Heard Island and provided the first comprehensive scientific information on the island's geology, flora, and fauna. Despite their entrapment in the ice for nearly 14 months (until February 1903), new territory was discovered: Kaiser Wilhelm II Land and its volcano—Gaussberg. Drygalski was the first to use a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erich Von Drygalski
Erich Dagobert von Drygalski (; February 9, 1865 – January 10, 1949) was a German geographer, geophysicist and polar scientist, born in Königsberg, East Prussia. Between 1882 and 1887, Drygalski studied mathematics and natural science at the University of Königsberg, Bonn, Berlin and Leipzig. He graduated with a doctorate thesis about ice shields in Nordic areas. Between 1888 and 1891, he was an assistant at the Geodetic Institute and the Central Office of International Geodetics in Berlin. Drygalski led two expeditions between 1891 and 1893, which were supplied by the Society for Geoscience of Berlin. One expedition wintered during the winter between 1892 and 1893 in Western Greenland. He habilitated 1889 for geography and geophysics with the collected scientific evidence. In 1898, Drygalski became associate professor and 1899 extraordinary professor for geography and geophysics in Berlin. ''Gauss'' expedition Drygalski led the first German South Polar expedition wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaiser Wilhelm II Land
Kaiser Wilhelm II Land is a part of Antarctica lying between Cape Penck at 87° 43'E and Cape Filchner at 91° 54'E. Princess Elizabeth Land is located to the west, and Queen Mary Land to the east. The area is claimed by Australia as part of the Australian Antarctic Territory, but like other territorial claims in Antarctica this is not universally recognized. Exploration The area was discovered on 22 February 1902, during the ''Gauss'' expedition of 1901–1903 led by Arctic veteran and geologist Erich von Drygalski. Drygalski named it after the sitting Kaiser Wilhelm II who had funded the expedition with 1.2 million Goldmarks. The expedition also discovered the Gaussberg, a extinct volcano, which was named after mathematician and physicist Carl Friedrich Gauss Johann Carl Friedrich Gauss (; german: Gauß ; la, Carolus Fridericus Gauss; 30 April 177723 February 1855) was a German mathematician and physicist who made significant contributions to many fiel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nunatak
A nunatak (from Inuit ''nunataq'') is the summit or ridge of a mountain that protrudes from an ice field or glacier that otherwise covers most of the mountain or ridge. They are also called glacial islands. Examples are natural pyramidal peaks. When rounded by glacial action, smaller rock promontories may be referred to as rognons. The word is of Greenlandic origin and has been used in English since the 1870s. Description The term is typically used in areas where a permanent ice sheet is present and the nunataks protrude above the sheet.J. J. Zeeberg, ''Climate and Glacial History of the Novaya Zemlya Archipelago, Russian Arctic''. pp. 82–84 Nunataks present readily identifiable landmark reference points in glaciers or ice caps and are often named. While some nunataks are isolated, sometimes they form dense clusters, such as Queen Louise Land in Greenland. Nunataks are generally angular and jagged, which hampers the formation of glacial ice on their tops, although snow can a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Antarctic Ice Sheet
The East Antarctic Ice Sheet (EAIS) is one of two large ice sheets in Antarctica, and the largest on the entire planet. The EAIS lies between 45° west and 168° east longitudinally. The EAIS holds enough ice to raise global sea levels by and is considerably larger in area and mass than the West Antarctic Ice Sheet (WAIS). It is separated from the WAIS by the Transantarctic Mountains. The EAIS is the driest, windiest, and coldest place on Earth, with temperatures reported down to nearly -100°C. The EAIS holds the thickest ice on Earth, at . It is home to the geographic South Pole and the Amundsen–Scott South Pole Station. Temperature changes Cooling in East Antarctica during the decades of the 1980s and 1990s partially offset the impact of climate change on the West Antarctic Ice Sheet, which has warmed by more than 0.1 °C/decade in the last 50 years. The continent-wide average surface temperature trend of Antarctica is positive and statistically significant at >0.0 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pillow Lava
Pillow lavas are lavas that contain characteristic pillow-shaped structures that are attributed to the extrusion of the lava underwater, or ''subaqueous extrusion''. Pillow lavas in volcanic rock are characterized by thick sequences of discontinuous pillow-shaped masses, commonly up to one meter in diameter. They form the upper part of Layer 2 of normal oceanic crust. Composition Pillow lavas are commonly of basaltic composition, although pillows formed of komatiite, picrite, boninite, basaltic andesite, andesite, dacite or even rhyolite are known. In general, the more felsic the composition (richer in silica - resulting in an Intermediate composition), the larger the pillows, due to the increase in viscosity of the erupting lava. Occurrence They occur wherever lava is extruded underwater, such as along marine hotspot volcano chains and the constructive plate boundaries of mid-ocean ridges. As new oceanic crust is formed, thick sequences of pillow lavas are erupted at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vestfold Hills
The Vestfold Hills are rounded, rocky, coastal hills, in extent, on the north side of Sorsdal Glacier on the Ingrid Christensen Coast of Princess Elizabeth Land, Antarctica. The hills are subdivided by three west-trending peninsulas bounded by narrow fjords. Most of the hills range between in height, with the highest summit reaching nearly . Geography The Vestfold Hills are largely snow and ice-free and are thus classified as an Antarctic oasis. They contain a great variety of lake systems with over 300 lakes and ponds including what is possibly the largest concentration of meromictic (stratified) lakes in the world. This region contains 37 permanently stratified water bodies, including six marine basins and seven seasonally isolated marine basins (SIMBs). These stratified basins also have great variety. They range in salinity from 4 g L−1 to 235 g L−1, in temperature from , in depth from , in area from and surface level from below to above sea level. The region contains ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
