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Akilia
{{Infobox islands , name = Akilia Island , native_name = , native_name_link = , native_name_lang = , sobriquet = , image_name = , image_size = , image_caption = , image_alt = , image_map = {{Infobox mapframe, id=Q1961989, zoom=11, stroke-colour=#3e614c, stroke-width=1 , image_map_alt = , image_map_size = 270px , image_map_caption = Map of Akilia Island , pushpin_map = Greenland , pushpin_label = Akilia Island , pushpin_label_position = , pushpin_map_alt = , pushpin_relief = , pushpin_map_caption = Location of the Akilia Island in Greenland , coordinates = ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Islands Of Greenland
The following is an alphabetical list of the islands of Greenland. Many of these islands have both a Kalaallisut language name and a European language name. Islands and archipelagoes * Aaluik *Aasiaat * Achton Friis Islands * Aggas * Akilia *Alluttoq Island *Aluk Island *Ammassalik Island *Appat Island * Apusiaajik Island *ATOW1996 * Beaumont Island * Bjorne Island * Bjorne Islands *Bonsall Islands * Bontekoe Island * Borup Island (West Jensen Island) * Brainard Island * Bushnan Island * Cape Farewell Archipelago ** Annikitsoq ** Anoraliuirsoq ** Avallersuaq ** Egger Island ** Ikeq Island ** Nunarsuaq (Nunarssuak) ** Pamialluk ** Qernertoq ** Sammisoq ** Saningassoq ** Walkendorff Island *Carey Islands * Castle Island, Greenland *Clavering Island * Crown Prince Islands * Crozier Island * Danmark Island *Danske Islands * Deception Island (Greenland) * Diego's Island *Djævleøen * Dog's Island * Edward Island * Elison Island * Ella Island * Ensomheden * Finsch Islands * Frankli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Origin Of Life
Abiogenesis is the natural process by which life arises from abiotic component, non-living matter, such as simple organic compounds. The prevailing scientific hypothesis is that the transition from non-living to organism, living entities on Earth was not a single event, but a process of increasing complexity involving the formation of a planetary habitability, habitable planet, the prebiotic synthesis of organic molecules, molecular self-replication, self-assembly, autocatalysis, and the emergence of cell membranes. The transition from non-life to life has never been observed experimentally, but many proposals have been made for different stages of the process. The study of abiogenesis aims to determine how pre-life chemical reactions gave rise to life under conditions strikingly different from those on Earth today. It primarily uses tools from biology and chemistry, with more recent approaches attempting a synthesis of many sciences. Life functions through the specialized ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Islands Of Greenland
The following is an alphabetical list of the islands of Greenland. Many of these islands have both a Kalaallisut language name and a Indo-European languages, European language name. Islands and archipelagoes *Aaluik *Aasiaat *Achton Friis Islands *Aggas *Akilia *Alluttoq Island *Aluk Island *Ammassalik Island *Appat Island *Apusiaajik Island *ATOW1996 *Beaumont Island (Greenland), Beaumont Island *Bjorne Island *Bjorne Islands *Bonsall Islands *Bontekoe Island *Borup Island (West Jensen Island) *Brainard Island *Bushnan Island *Cape Farewell Archipelago **Annikitsoq **Anoraliuirsoq **Avallersuaq **Egger Island **Ikeq Island **Nunarsuaq (Nunarssuak) **Pamialluk **Qernertoq **Sammisoq **Saningassoq **Walkendorff Island *Carey Islands *Castle Island, Greenland *Clavering Island *Crown Prince Islands *Crozier Island *Danmark Island *Danske Islands *Deception Island (Greenland) *Diego's Island *Djævleøen *Dog's Island *Edward Island *Elison Island *Ella Island *Ensomheden *Finsch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Banded Iron Formation
Banded iron formations (BIFs; also called banded ironstone formations) are distinctive units of sedimentary rock consisting of alternating layers of iron oxides and iron-poor chert. They can be up to several hundred meters in thickness and extend laterally for several hundred kilometers. Almost all of these formations are of Precambrian age and are thought to record the Great Oxygenation Event, oxygenation of the Earth's oceans. Some of the Earth's oldest rock formations, which formed about (Year#SI prefix multipliers, Ma), are associated with banded iron formations. Banded iron formations are thought to have formed in sea water as the result of oxygen production by photosynthesis, photosynthetic cyanobacteria. The oxygen combined with dissolved iron in Earth's oceans to form insoluble iron oxides, which precipitated out, forming a thin layer on the ocean floor. Each band is similar to a varve, resulting from cyclic variations in oxygen production. Banded iron formations we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Greenland
Greenland is the largest island on Earth. Only one-fifth of its surface area is exposed bedrock, the rest being covered by ice. The exposed surface is approximately 410,000 km2. The geology of Greenland is dominated by crystalline rocks of the Precambrian Shield."Greenland Geology." ''Geological Survey of Denmark and Greenland''. 20 June 2003 (retrieved 26 Dec 2010) The crystalline rocks of the Nuuk/Qeqertarsuatsiaat area comprise some of the oldest bedrock in Greenland which covers most of western Greenland. The surface has been altered several times and has an appearance as though it were shaped billions of years ago. This is one of the reasons why the Nuuk area is extraordinary and also because the particular climate zone for the area limits the vegetation which makes it p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stable Isotope
Stable nuclides are Isotope, isotopes of a chemical element whose Nucleon, nucleons are in a configuration that does not permit them the surplus energy required to produce a radioactive emission. The Atomic nucleus, nuclei of such isotopes are not radioactive and unlike radionuclides do not spontaneously undergo radioactive decay. When these nuclides are referred to in relation to specific elements they are usually called that element's stable isotopes. The 80 elements with one or more stable isotopes comprise a total of 251 nuclides that have not been shown to decay using current equipment. Of these 80 elements, 26 have only one stable isotope and are called monoisotopic element, monoisotopic. The other 56 have more than one stable isotope. Tin has ten stable isotopes, the largest number of any element. Definition of stability, and naturally occurring nuclides Most naturally occurring nuclides are stable (about 251; see list at the end of this article), and about 35 more (tot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon-13
Carbon-13 (13C) is a natural, stable isotope of carbon with a nucleus containing six protons and seven neutrons. As one of the environmental isotopes, it makes up about 1.1% of all natural carbon on Earth. Detection by mass spectrometry A mass spectrum of an organic compound will usually contain a small peak of one mass unit greater than the apparent molecular ion peak (M) of the whole molecule. This is known as the M+1 peak and comes from the few molecules that contain a 13C atom in place of a 12C. A molecule containing one carbon atom will be expected to have an M+1 peak of approximately 1.1% of the size of the M peak, as 1.1% of the molecules will have a 13C rather than a 12C. Similarly, a molecule containing two carbon atoms will be expected to have an M+1 peak of approximately 2.2% of the size of the M peak, as there is double the previous likelihood that any molecule will contain a 13C atom. In the above, the mathematics and chemistry have been simplified, however it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graphite
Graphite () is a Crystallinity, crystalline allotrope (form) of the element carbon. It consists of many stacked Layered materials, layers of graphene, typically in excess of hundreds of layers. Graphite occurs naturally and is the most stable form of carbon under standard conditions. Synthetic and natural graphite are consumed on a large scale (1.3million metric tons per year in 2022) for uses in many critical industries including refractories (50%), lithium-ion batteries (18%), foundries (10%), and lubricants (5%), among others (17%). Graphite converts to diamond under extremely high pressure and temperature. Graphite's low cost, thermal and chemical inertness and characteristic conductivity of heat and electricity finds numerous applications in high energy and high temperature processes. Types and varieties Graphite can occur naturally or be produced synthetically. Natural graphite is obtained from naturally occurring geologic deposits and synthetic graphite is produced t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon
Carbon () is a chemical element; it has chemical symbol, symbol C and atomic number 6. It is nonmetallic and tetravalence, tetravalent—meaning that its atoms are able to form up to four covalent bonds due to its valence shell exhibiting 4 electrons. It belongs to group 14 of the periodic table. Carbon makes up about 0.025 percent of Earth's crust. Three Isotopes of carbon, isotopes occur naturally, carbon-12, C and carbon-13, C being stable, while carbon-14, C is a radionuclide, decaying with a half-life of 5,700 years. Carbon is one of the timeline of chemical element discoveries#Pre-modern and early modern discoveries, few elements known since antiquity. Carbon is the 15th abundance of elements in Earth's crust, most abundant element in the Earth's crust, and the abundance of the chemical elements, fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. Carbon's abundance, its unique diversity of organic compounds, and its unusual abi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrothermal Circulation
Hydrothermal circulation in its most general sense is the circulation of hot water (Ancient Greek ὕδωρ, ''water'',Liddell, H.G. & Scott, R. (1940). ''A Greek-English Lexicon. revised and augmented throughout by Sir Henry Stuart Jones. with the assistance of. Roderick McKenzie.'' Oxford: Clarendon Press. and θέρμη, ''heat'' ). Hydrothermal circulation occurs most often in the vicinity of sources of heat within the Earth's Crust (geology), crust. In general, this occurs near volcanic activity, but can occur in the shallow to mid crust along deeply penetrating fault irregularities or in the deep crust related to the intrusion of granite, or as the result of orogeny or metamorphism. Hydrothermal circulation often results in Hydrothermal mineral deposit, hydrothermal mineral deposits. Seafloor hydrothermal circulation Hydrothermal circulation in the ocean, oceans is the passage of the water through mid-oceanic ridge systems. The term includes both the circulation of the well- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Smoker
Hydrothermal vents are fissures on the seabed from which geothermally heated water discharges. They are commonly found near volcanically active places, areas where tectonic plates are moving apart at mid-ocean ridges, ocean basins, and hotspots. The dispersal of hydrothermal fluids throughout the global ocean at active vent sites creates hydrothermal plumes. Hydrothermal deposits are rocks and mineral ore deposits formed by the action of hydrothermal vents. Hydrothermal vents exist because the Earth is both geologically active and has large amounts of water on its surface and within its crust. Under the sea, they may form features called black smokers or white smokers, which deliver a wide range of elements to the world's oceans, thus contributing to global marine biogeochemistry. Relative to the majority of the deep sea, the areas around hydrothermal vents are biologically more productive, often hosting complex communities fueled by the chemicals dissolved in the vent flu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Davis Strait
The Davis Strait (Danish language, Danish: ''Davisstrædet'') is a southern arm of the Arctic Ocean that lies north of the Labrador Sea. It lies between mid-western Greenland and Baffin Island in Nunavut, Canada. To the north is Baffin Bay. The strait was named for the English explorer John Davis (English explorer), John Davis (1550–1605), who explored the area while seeking a Northwest Passage. By the 1650s it was used for whaling, whale hunting. Extent The International Hydrographic Organization defines the limits of the Davis Strait as follows: ''On the North.'' The Southern limit of Baffin Bay [The parallel of 70th parallel north, 70° North between Greenland and Baffin Island, Baffin Land]. ''On the East.'' The Southwest coast of Greenland. ''On the South.'' The parallel of 60th parallel north, 60° North between Greenland and Labrador. ''On the West.'' The Eastern limit of the Northwest Passage, Northwestern Passages South of 70° North [the East coast of Baffin Islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
