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Erratic Valley
Erratic Valley is a short valley on Alexander Island, Antarctica, that joins Ablation Valley from the north. It was named from the large number of erratic igneous blocks observed in the valley by a University of Aberdeen field party which mapped the area in 1978–79. The site lies within Antarctic Specially Protected Area (ASPA) No.147. See also * Flatiron Valley * Moutonnée Valley * Viking Valley Viking Valley () is a valley lying on the east side of Mars Glacier containing a braided stream which feeds into Secret Lake, situated in the southeast corner of Alexander Island, Antarctica. This area was the prime research site of the 1992-93 Ma ... References Valleys of Antarctica Valleys of Alexander Island Antarctic Specially Protected Areas {{AlexanderIsland-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Island
Alexander Island, which is also known as Alexander I Island, Alexander I Land, Alexander Land, Alexander I Archipelago, and Zemlja Alexandra I, is the largest island of Antarctica. It lies in the Bellingshausen Sea west of Palmer Land, Antarctic Peninsula from which it is separated by Marguerite Bay and George VI Sound. The George VI Ice Shelf entirely fills George VI Sound and connects Alexander Island to Palmer Land. The island partly surrounds Wilkins Sound, which lies to its west.Stewart, J. (2011) ''Antarctic An Encyclopedia'' McFarland & Company Inc, New York. 1776 pp. . Alexander Island is about long in a north–south direction, wide in the north, and wide in the south. Alexander Island is the second-largest uninhabited island in the world, after Devon Island. History Alexander Island was discovered on January 28, 1821, by a Russian expedition under Fabian Gottlieb von Bellingshausen, who named it Alexander I Land for the reigning Tsar Alexander I of Russia. Wha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ablation Valley
Ablation Valley, also known as Ablation Bay, is a mainly ice-free valley on the east coast of Alexander Island, long, which is entered immediately south of Ablation Point, opens on George VI Sound and lies immediately north of Ganymede Heights. It was first photographed from the air on 23 November 1935 by Lincoln Ellsworth and mapped from these photographs by W.L.G. Joerg. It was first visited and surveyed in 1936 by the British Graham Land Expedition (BGLE), and given the name "Ablation" by them because of the relatively small amounts of snow and ice found there. The site lies within Antarctic Specially Protected Area (ASPA) No.147. Climate The climate of the area is affected by easterly-moving cyclonic depressions of the Southern Ocean. These depressions make the weather relatively mild; bring strong northerly winds and a heavy cloud cover to the region. The climate is also characterized by continental north to northwesterly flow of cold anticyclone air from the West Antarcti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacial Erratic
A glacial erratic is glacially deposited rock differing from the type of rock native to the area in which it rests. Erratics, which take their name from the Latin word ' ("to wander"), are carried by glacial ice, often over distances of hundreds of kilometres. Erratics can range in size from pebbles to large boulders such as Big Rock () in Alberta. Geologists identify erratics by studying the rocks surrounding the position of the erratic and the composition of the erratic itself. Erratics are significant because: *They can be transported by glaciers, and they are thereby one of a series of indicators which mark the path of prehistoric glacier movement. Their lithographic origin can be traced to the parent bedrock, allowing for confirmation of the ice flow route. *They can be transported by ice rafting. This allows quantification of the extent of glacial flooding resulting from ice dam failure which release the waters stored in proglacial lakes such as Lake Missoula. Erratics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Igneous Rock
Igneous rock (derived from the Latin word ''ignis'' meaning fire), or magmatic rock, is one of the three main The three types of rocks, rock types, the others being Sedimentary rock, sedimentary and metamorphic rock, metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from Partial melting, partial melts of existing rocks in either a Terrestrial planet, planet's mantle (geology), mantle or crust (geology), crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusive rocks or on the surface as extrusive (geology), extrusive rocks. Igneous rock may form with crystallization to form granular, crystalline rocks, or without crystallization to form Volcanic glass, natural glasses. Igneous rocks occur in a wide range of geological settings: shields, platforms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Aberdeen
The University of Aberdeen ( sco, University o' 'Aiberdeen; abbreviated as ''Aberd.'' in List of post-nominal letters (United Kingdom), post-nominals; gd, Oilthigh Obar Dheathain) is a public university, public research university in Aberdeen, Scotland. It is an Ancient universities of Scotland, ancient university founded in 1495 when William Elphinstone, Bishop of Aberdeen and Lord Chancellor of Scotland, Chancellor of Scotland, petitioned Pope Alexander VI on behalf of James IV of Scotland, James IV, King of Scots to establish King's College, Aberdeen, King's College, making it Scotland's 3rd oldest university and the 5th oldest in the English-speaking world and the United Kingdom. Aberdeen is consistently ranked among the top 160 universities in the world and is ranked within the top 20 universities in the United Kingdom according to ''The Times'' and ''The Sunday Times'', and 13th in the UK according to ''The Guardian''. The university comprises three colleges—King's College ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctic Specially Protected Area
An Antarctic Specially Protected Area (ASPA) is an area on the continent of Antarctica, or on nearby islands, which is protected by scientists and several different international bodies. The protected areas were established in 1961 under the Antarctic Treaty System, which governs all the land and water south of 60 latitude and protects against human development. A permit is required for entry into any ASPA site. The ASPA sites are protected by the governments of Australia, New Zealand, United States, United Kingdom, Chile, France, Argentina, Poland, Russia, Norway, Japan, India, Italy, and Republic of Korea. There are currently 72 sites. List of ASPA sites See also *Antarctic Specially Managed Area An Antarctic Specially Managed Area (ASMA) is a protected area on the continent of Antarctica, or on its adjacent islands. ASMAs are managed by the governments of Brazil, Poland, Ecuador, Peru, United States, New Ze ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ablation Point – Ganymede Heights Antarctic Specially Protected Area
The Ablation Point – Ganymede Heights Antarctic Specially Protected Area is a 180 km2 mountainous tract of land on the eastern side of Alexander Island in the Bellinghausen Sea, west of Palmer Land on the Antarctic Peninsula. It has been designated Antarctic Specially Protected Area (ASPA) No.147 for its geological, geomorphological, glaciological, limnological, and ecological values, and to protect its terrestrial and freshwater ecosystems from uncontrolled human visitation and activity. Description The ASPA is some 18 km long from north to south, and 10 km wide east to west. It is flanked in the west by the upper Jupiter Glacier, in the east by the George VI Sound permanent ice shelf, in the north by Grotto Glacier and in the south by the lower Jupiter Glacier. It contains the largest contiguous ice-free ablation area in the Antarctic Peninsula, with the smaller ice fields and valley glaciers within the massif comprising only about 17% of the site. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flatiron Valley
Flatiron Valley is a north-south valley including a sub-glacial lake, located in the south part of the Ganymede Heights, marginal to Jupiter Glacier, situated in eastern Alexander Island, Antarctica. The name derives from field work in 1978–79 by the Department of Geography, University of Aberdeen, Scotland, with British Antarctic Survey support. It was named from the triangular slope facets between prominent gullies on the west side of the valley. The site lies within Antarctic Specially Protected Area (ASPA) No.147. See also * Ablation Valley * Erratic Valley * Viking Valley Viking Valley () is a valley lying on the east side of Mars Glacier containing a braided stream which feeds into Secret Lake, situated in the southeast corner of Alexander Island, Antarctica. This area was the prime research site of the 1992-93 Ma ... References Valleys of Antarctica Valleys of Alexander Island Antarctic Specially Protected Areas {{AlexanderIsland-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moutonnée Valley
Moutonnée Valley is a valley in the Ganymede Heights area on the east coast of Alexander Island, Antarctica. The valley runs eastward towards Moutonnée Lake and George VI Sound. It was named in association with the lake by the United Kingdom Antarctic Place-Names Committee in 1980. The site lies within Antarctic Specially Protected Area (ASPA) No.147. See also * Ablation Valley Ablation Valley, also known as Ablation Bay, is a mainly ice-free valley on the east coast of Alexander Island, long, which is entered immediately south of Ablation Point, opens on George VI Sound and lies immediately north of Ganymede Heights. I ... * Erratic Valley * Viking Valley References Valleys of Antarctica Valleys of Alexander Island {{AlexanderIsland-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viking Valley
Viking Valley () is a valley lying on the east side of Mars Glacier containing a braided stream which feeds into Secret Lake, situated in the southeast corner of Alexander Island, Antarctica. This area was the prime research site of the 1992-93 Mars Glacier field party led by D. D. Wynn-Williams. The feature was named by the United Kingdom Antarctic Place-Names Committee in 1993 in association with nearby Mars Glacier. The name "Viking" stems from the Viking Lander project of NASA which first searched for life on Mars in 1976. See also * Ablation Valley * Flatiron Valley * Moutonnée Valley Moutonnée Valley is a valley in the Ganymede Heights area on the east coast of Alexander Island, Antarctica. The valley runs eastward towards Moutonnée Lake and George VI Sound. It was named in association with the lake by the United Kingdom Ant ... Valleys of Antarctica Valleys of Alexander Island {{AlexanderIsland-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valleys Of Antarctica
A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacial ice. These glaciers may remain present in valleys in high mountains or polar areas. At lower latitudes and altitudes, these glacially formed valleys may have been created or enlarged during ice ages but now are ice-free and occupied by streams or rivers. In desert areas, valleys may be entirely dry or carry a watercourse only rarely. In areas of limestone bedrock, dry valleys may also result from drainage now taking place underground rather than at the surface. Rift valleys arise principally from earth movements, rather than erosion. Many different types of valleys are described by geographers, using terms that may be global in use or else applied only locally. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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