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Henson Glacier (Greenland)
Henson Glacier ( da, Henson Gletscher), is one of the major glaciers in northern Greenland. It was named in 1917 for African-American Arctic explorer Matthew Henson by Knud Rasmussen during the Second Thule Expedition to north Greenland. The Henson Gletscher Formation, which preserves trilobites and echinoderm fossils, among others, is named after this glacier. Geography The Henson Glacier originates in the Greenland Ice Cap. It is roughly north–south oriented and has its terminus at the head of the J.P. Koch Fjord. The Expedition Glacier discharges from the west north of the terminus of the Henson Glacier, between the head of the fjord and Navarana Fjord on the Freuchen Land side. The Hans Tausen Ice Cap is located to the east, close to the glacier tongue. Bibliography *H.P. Trettin (ed.), ''Geology of the Innuitian Orogen and Arctic Platform of Canada and Greenland''. Geological Survey of Canada (1991) See also * Henson Gletscher Formation *List of glaciers in Gree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tidal Outlet Glacier
Glacier morphology, or the form a glacier takes, is influenced by temperature, precipitation, topography, and other factors. The goal of glacial morphology is to gain a better understanding of glaciated landscapes and the way they are shaped. Types of glaciers can range from massive ice sheets, such as the Greenland ice sheet, to small cirque glaciers found perched on mountain tops. Glaciers can be grouped into two main categories: * Ice flow is constrained by the underlying bedrock topography * Ice flow is unrestricted by surrounding topography Unconstrained Glaciers Ice sheets and ice caps Ice sheets and ice caps cover the largest areas of land in comparison to other glaciers, and their ice is unconstrained by the underlying topography. They are the largest glacial ice formations and hold the vast majority of the world's fresh water. Ice sheets Ice sheets are the largest form of glacial formation. They are continent sized ice masses that span areas over . They are dome s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenland Ice Cap
The Greenland ice sheet ( da, Grønlands indlandsis, kl, Sermersuaq) is a vast body of ice covering , roughly near 80% of the surface of Greenland. It is sometimes referred to as an ice cap, or under the term ''inland ice'', or its Danish equivalent, ''indlandsis''. An acronym, GIS, is frequently used in the scientific literature. It is the second largest ice body in the world, after the Antarctic ice sheet. The ice sheet is almost long in a north–south direction, and its greatest width is at a latitude of 77°N, near its northern margin. The average thickness is about and over at its thickest point. In addition to the large ice sheet, smaller ice caps (such as Maniitsoq and Flade Isblink) as well as glaciers, cover between around the periphery. The Greenland ice sheet is adversely affected by climate change. It is more vulnerable to climate change than the Antarctic ice sheet because of its position in the Arctic, where it is subject to the regional amplification of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Glaciers In Greenland
This is a list of glaciers in Greenland. Details on the size and flow of some of the major Greenlandic glaciers are listed by Eric Rignot and Pannir Kanagaratnam (2006) Ice sheets and caps *Greenland Ice Sheet * Christian Erichsen Ice Cap * Flade Isblink * Gungner Ice Cap *Hans Tausen Ice Cap * Heimdal Ice Cap * Hurlbut Glacier * Ismarken * Mælkevejen * Maniitsoq Ice Cap (Sukkertoppen) * Storm Ice Cap * Upper Frederiksborg Glacier Other glaciers *A. Harmsworth Glacier *Aage Bertelsen Glacier *Academy Glacier, N *Academy Glacier, NW *Adolf Hoel Glacier *Akuliarutsip Sermerssua *Amdrup Glacier *Apusiaajik Glacier *Balder Glacier *Bernstorff Glacier * Borgjokel Glacier *Bowdoin Glacier *Bredebrae *Bruckner Glacier * C. H. Ostenfeld Glacier * Chamberlin Glacier *Christian IV Glacier *Copeland Glacier (Pasterze Glacier) *Daugaard-Jensen Glacier * Diebitsch Glacier * Docker Smith Glacier *Dodge Glacier * Ejnar Mikkelsen Glacier *F. Graae Glacier *Fan Glacier * Farquhar Glacier * Fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operational Navigation Chart A-5, 3rd Edition
An operational definition specifies concrete, replicable procedures designed to represent a construct. In the words of American psychologist S.S. Stevens (1935), "An operation is the performance which we execute in order to make known a concept." For example, an operational definition of "fear" (the construct) often includes measurable physiologic responses that occur in response to a perceived threat. Thus, "fear" might be operationally defined as specified changes in heart rate, galvanic skin response, pupil dilation, and blood pressure. Overview An operational definition is designed to model or represent a concept or theoretical definition, also known as a construct. Scientists should describe the operations (procedures, actions, or processes) that define the concept with enough specificity such that other investigators can replicate their research. Operational definitions are also used to define system states in terms of a specific, publicly accessible process of preparation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Tausen Ice Cap
Hans Tausen Ice Cap ( da, Hans Tausens Iskappe) is an ice cap in Peary Land, northern Greenland. Administratively it is part of the Northeast Greenland National Park. Age Ice cores show it is around 3500–4000 years old. It formed since the Holocene climatic optimum of 6000-8000 BP. It is a well studied ice cap, and is important to understanding the Holocene climatic optimum. Geography The ice cap is located south of Amundsen Land and the Nordpasset, at the western end of the De Long Fjord area, east of Freuchen Land across the inner J.P. Koch Fjord, west of Odin Fjord and south of the O.B. Bøggild Fjord.GoogleEarth It is about from north to south and from east to west and sits on a high plateau. The Hans Tausen Ice Cap is the source of many glaciers, including the Ymer Glacier to the east, the Aajaku Glacier, Inukitsaq Glacier and Persuaq Glacier to the west, and the Lur Glacier and Tjalfe Glacier to the north. See also *List of glaciers in Greenland Thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freuchen Land
Freuchen Land is a peninsula in far northwestern Greenland. It is a part of the Northeast Greenland National Park. History Freuchen Land was named after Arctic explorer Peter Freuchen (1886–1957), who took part in the 1906–1908 Denmark expedition and later in Knud Rasmussen's Thule expeditions. Geography Freuchen Land is located to the northeast of Nares Land, south of Sverdrup Island, and west of Nansen Land and the Hans Tausen Ice Cap. Its westernmost headland is Cape Wegener. The peninsula is bounded to the west by the Nordenskiöld Fjord and to the east by the J.P. Koch Fjord. Navarana Fjord, a branch of J.P. Koch Fjord, cuts deeply southwards into the peninsula, nearly dividing it in two. This fjord was named after Peter Freuchen's Inuit wife, Navarana Mequpaluk (died 1921) To the southeast lie the Henson Gletscher and the Expedition Glacier which have their terminus at the J.P. Koch Fjord. To the south the peninsula is attached to the mainland and its ice ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Navarana Fjord
Navarana Fjord is a fjord in Peary Land, far northern Greenland. It is named after an Inuit woman. In 1984 important zinc and barium deposits were discovered in the Navarana Fjord. Australian Ironbark Zinc corporation was granted an exploration licence in 2007. History This fjord was mapped by Danish Arctic explorer Eigil Knuth during the Danish Peary Land Expedition of 1947–1950. It was named after Navarana Mequpaluk (died 1921), the wife of Arctic explorer Peter Freuchen (1886–1957). Navarana had died at Upernavik in 1921 just before joining the Fifth Thule Expedition with her husband. Her death came at the time of the influenza epidemic that ravaged indigenous populations in Greenland in the early 1920s.Janice Cavell & Jeff Noakes, ''Acts of Occupation: Canada and Arctic Sovereignty, 1918–25''; p. 140 Geography Navarana Fjord is located in the northeastern part of Freuchen Land, western Peary Land. It is the only significant branch of J.P. Koch Fjord, with the junct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Expedition Glacier
Expedition may refer to: * An exploration, journey, or voyage undertaken by a group of people especially for discovery and scientific research Places * Expedition Island, a park in Green River, Wyoming, US * Expedition Range, a mountain range in Queensland, Australia Arts, entertainment, and media * ''Expedition'' (book), a science-fiction novel by Wayne Douglas Barlowe *''Expedition Magazine'', published by Penn Museum *''Expedition!'' (1960-62), an American travel documentary television series *Expedition, included in the List of Pokémon Trading Card Game sets * ''Expeditions'' (poetry collection), a collection of poetry by Margaret Atwood *''L'Expédition'', a volume of the French science fiction comic series '' Les Mondes d'Aldébaran'', part of the ''Bételgeuse'' graphic novel *''L'expédition'', a novel by Agnès Desarthe *''L'Expédition'', written by cartoonist Richard Marazano *'' Northern Exposure: Expeditions'', album by Sasha and John Digweed (1999) *L'expé ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinoderm
An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Adult echinoderms are found on the sea bed at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are the largest entirely marine phylum. The first definitive echinoderms appeared near the start of the Cambrian. The echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in the biotic desert of the deep sea, as well as shallower oceans. Most echinoderms are able to reproduce asexually and regenerate tissue, organs, and limbs; in some cases, they can undergo complete regeneration from a single limb. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenland
Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland is the world's largest island. It is one of three constituent countries that form the Kingdom of Denmark, along with Denmark and the Faroe Islands; the citizens of these countries are all citizens of Denmark and the European Union. Greenland's capital is Nuuk. Though a part of the continent of North America, Greenland has been politically and culturally associated with Europe (specifically Norway and Denmark, the colonial powers) for more than a millennium, beginning in 986.The Fate of Greenland's Vikings , by Dale Mackenzie Brown, ''Archaeological Institute of America'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilobites
Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period () and they flourished throughout the lower Paleozoic before slipping into a long decline, when, during the Devonian, all trilobite orders except the Proetida died out. The last extant trilobites finally disappeared in the mass extinction at the end of the Permian about 252 million years ago. Trilobites were among the most successful of all early animals, existing in oceans for almost 270 million years, with over 22,000 species having been described. By the time trilobites first appeared in the fossil record, they were already highly diversified and geographically dispersed. Because trilobites had wide diversity and an easily fossilized exoskeleton, they left an extensive fossil record. The stud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henson Gletscher Formation
The Henson Gletscher Formation is a geologic formation in Greenland. It preserves fossils dating back to the Cambrian period. It is named after the Henson Glacier (Greenland). See also * List of fossiliferous stratigraphic units in Greenland This is a list of fossiliferous stratigraphic units in Greenland. List of fossiliferous stratigraphic units See also * List of fossiliferous stratigraphic units in Antarctica * Lists of fossiliferous stratigraphic units in North America * ... References * Cambrian Greenland Cambrian southern paleotropical deposits {{Greenland-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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