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Castle Peak (Antarctica)
Castle Peak () is a prominent ice-covered peak, high, standing immediately south of Murphy Glacier and close off the west side of Avery Plateau in Graham Land. It is shaped like a truncated cone with a rounded summit and rises more than above the surrounding ice. It was first surveyed in 1946 by the Falkland Islands Dependencies Survey, and so named by them because of its resemblance to a ruined medieval castle A castle is a type of fortified structure built during the Middle Ages predominantly by the nobility or royalty and by military orders. Scholars debate the scope of the word ''castle'', but usually consider it to be the private fortified r .... References * Mountains of Graham Land Loubet Coast {{LoubetCoast-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidal Peak
A pyramidal peak, sometimes called a glacial horn in extreme cases, is an angular, sharply pointed mountain peak which results from the cirque erosion due to multiple glaciers diverging from a central point. Pyramidal peaks are often examples of nunataks. Formation Glaciers, typically forming in drainages on the sides of a mountain, develop bowl-shaped basins called cirques (sometimes called ‘corries’ - from Scottish Gaelic ʰəɾə(a bowl) - or s). Cirque glaciers have rotational sliding that abrades the floor of the basin more than walls and that causes the bowl shape to form. As cirques are formed by glaciation in an alpine environment, the headwall and ridges between parallel glaciers called arêtes become more steep and defined. This occurs due to freeze/thaw and mass wasting beneath the ice surface. It is widely held that a common cause for headwall steepening and extension headward is the crevasses known as bergschrund that occur between the moving ice and the he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Murphy Glacier
Murphy Glacier is a glacier on Pernik Peninsula, Loubet Coast in Graham Land, flowing generally westward to Orford Cliff and merging with Wilkinson Glacier before terminating in Lallemand Fjord. It was mapped from air photos taken by Falkland Islands and Dependencies Aerial Survey Expedition (FIDASE) (1956–57). It was named for Thomas L. Murphy, Falkland Islands Dependencies Survey (FIDS) leader and assistant surveyor at Detaille Island Detaille Island is a small island off the northern end of the Arrowsmith Peninsula in Graham Land, Antarctica. From 1956 to 1959 it was home to "Base W" of the British Antarctic Survey and closed after the end of the International Geophysical ... in 1956. References Glaciers of Loubet Coast {{LoubetCoast-glacier-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avery Plateau
Avery Plateau () is an ice-covered plateau, about long and rising to about , midway between Loubet Coast and Foyn Coast in Graham Land, Antarctica. It borders Hemimont Plateau on the south and Bruce Plateau on the north. The first sighting of this plateau is not certain, but it was presumably seen in January and February 1909 by members of the French Antarctic Expedition under Jean-Baptiste Charcot from various positions in the Matha Strait. It was surveyed in 1946–47 by the Falkland Islands Dependencies Survey, and named by the UK Antarctic Place-Names Committee (1955) after Captain George Avery, master of the cutter ''Lively'', who, with Captain John Biscoe in the brig ''Tula'', approached this part of the Antarctic Peninsula in February 1832. Central plateaus of Graham Land North to south: * Laclavère Plateau * Louis Philippe Plateau * Detroit Plateau * Herbert Plateau * Foster Plateau * Forbidden Plateau * Bruce Plateau * Avery Plateau * Hemimont Plateau Hemimont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graham Land
Graham Land is the portion of the Antarctic Peninsula that lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in which the name "Antarctic Peninsula" was approved for the major peninsula of Antarctica, and the names Graham Land and Palmer Land for the northern and southern portions, respectively. The line dividing them is roughly 69 degrees south. Graham Land is named after Sir James R. G. Graham, First Lord of the Admiralty at the time of John Biscoe's exploration of the west side of Graham Land in 1832. It is claimed by Argentina (as part of Argentine Antarctica), Britain (as part of the British Antarctic Territory) and Chile (as part of the Chilean Antarctic Territory). Graham Land is the closest part of Antarctica to South America. Thus it is the usual destination for small ships taking paying ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falkland Islands Dependencies Survey
The British Antarctic Survey (BAS) is the United Kingdom's national polar research institute. It has a dual purpose, to conduct polar science, enabling better understanding of global issues, and to provide an active presence in the Antarctic on behalf of the UK. It is part of the Natural Environment Research Council (NERC). With over 400 staff, BAS takes an active role in Antarctic affairs, operating five research stations, one ship and five aircraft in both polar regions, as well as addressing key global and regional issues. This involves joint research projects with over 40 UK universities and more than 120 national and international collaborations. Having taken shape from activities during World War II, it was known as the Falkland Islands Dependencies Survey until 1962. History Operation Tabarin was a small British expedition in 1943 to establish permanently occupied bases in the Antarctic. It was a joint undertaking by the Admiralty and the Colonial Office. At the end of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Castle
A castle is a type of fortified structure built during the Middle Ages predominantly by the nobility or royalty and by military orders. Scholars debate the scope of the word ''castle'', but usually consider it to be the private fortified residence of a lord or noble. This is distinct from a palace, which is not fortified; from a fortress, which was not always a residence for royalty or nobility; from a ''pleasance'' which was a walled-in residence for nobility, but not adequately fortified; and from a fortified settlement, which was a public defence – though there are many similarities among these types of construction. Use of the term has varied over time and has also been applied to structures such as hill forts and 19th-20th century homes built to resemble castles. Over the approximately 900 years when genuine castles were built, they took on a great many forms with many different features, although some, such as curtain walls, arrowslits, and portcullises, were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountains Of Graham Land
A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (1,000 feet) above the surrounding land. A few mountains are isolated summits, but most occur in mountain ranges. Mountains are formed through tectonic forces, erosion, or volcanism, which act on time scales of up to tens of millions of years. Once mountain building ceases, mountains are slowly leveled through the action of weathering, through slumping and other forms of mass wasting, as well as through erosion by rivers and glaciers. High elevations on mountains produce colder climates than at sea level at similar latitude. These colder climates strongly affect the ecosystems of mountains: different elevations have different plants and animals. Because of the less hospitable terrain and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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