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Koniuji Island
Koniuji Island is one of the Andreanof Islands subgroup of the Aleutian Islands of southwestern Alaska, United States. It lies northwest of Atka Island and east of Kasatochi Island. Koniuji Island has a land area of and is uninhabited. The name "Koniuji" is derived from russian: конюга, translit=konyuga "auklet", bestowed by Russian sailors in reference to the endemic seabirds. The Aleut The Aleuts ( ; russian: Алеуты, Aleuty) are the indigenous people of the Aleutian Islands, which are located between the North Pacific Ocean and the Bering Sea. Both the Aleut people and the islands are politically divided between the ... name is "the big made island", in reference to putative recent volcanic activity. Koniuji Island is the emergent top of a mostly submarine stratovolcano. Little is known of the geologic history of this volcano. Reports of recent eruptive activity may be erroneous and are considered to refer to eruptions of Kasatochi volcano to the west. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratovolcano
A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as . Stratovolcanoes are sometimes called composite volcanoes because of their composite stratified structure, built up from sequential outpourings of erupted materials. They are among the most common types of volcanoes, in contrast to the less common shield volca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleut Language
Aleut () or ''Unangam Tunuu'' is the language spoken by the Aleut living in the Aleutian Islands, Pribilof Islands, Commander Islands, and the Alaska Peninsula (in Aleut , the origin of the state name Alaska). Aleut is the sole language in the Aleut branch of the Eskimo–Aleut language family. The Aleut language consists of three dialects, including (Eastern Aleut), / (Atka Aleut), and / (Western Aleut; now extinct). Various sources estimate there are fewer than 100 to 150 remaining active Aleut speakers. Eastern and Atkan Aleut are classified as "critically endangered and extinct" and have aEGIDSrating of 7. The task of revitalizing Aleut has largely been left to local government and community organizations. The overwhelming majority of schools in the historically Aleut-speaking regions lack any language/culture courses in their curriculum, and those that do fail to produce fluent or even proficient speakers. History The Eskimo and Aleut peoples were part of a migration f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratovolcanoes Of The United States
A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as . Stratovolcanoes are sometimes called composite volcanoes because of their composite stratified structure, built up from sequential outpourings of erupted materials. They are among the most common types of volcanoes, in contrast to the less common shield volc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Alaska
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 diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene Stratovolcanoes
The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene has been identified with the current warm period, known as MIS 1. It is considered by some to be an interglacial period within the Pleistocene Epoch, called the Flandrian interglacial.Oxford University Press – Why Geography Matters: More Than Ever (book) – "Holocene Humanity" section https://books.google.com/books?id=7P0_sWIcBNsC The Holocene corresponds with the rapid proliferation, growth and impacts of the human species worldwide, including all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Islands Of Unorganized Borough, Alaska
An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island in a river or a lake island may be called an eyot or ait, and a small island off the coast may be called a holm. Sedimentary islands in the Ganges delta are called chars. A grouping of geographically or geologically related islands, such as the Philippines, is referred to as an archipelago. There are two main types of islands in the sea: continental and oceanic. There are also artificial islands, which are man-made. Etymology The word ''island'' derives from Middle English ''iland'', from Old English ''igland'' (from ''ig'' or ''ieg'', similarly meaning 'island' when used independently, and -land carrying its contemporary meaning; cf. Dutch ''eiland'' ("island"), German ''Eiland'' ("small island")). However, the spelling of the word ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Islands Of Alaska ...
This is a list of islands of the U.S. state of Alaska. Approximately 2,670 named islands help to make Alaska the largest state in the United States. A B C D E F G H I J K L M N O P Q R S T U V W Y Z See also *List of lakes of Alaska *List of rivers of Alaska * List of waterfalls of Alaska Notes USGS GNIS named islands by Borough or Census Area: References General references * {{DEFAULTSORT:List Of Islands Of Alaska Islands * Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uninhabited Islands Of Alaska
The list of uninhabited regions includes a number of places around the globe. The list changes year over year as human beings migrate into formerly uninhabited regions, or migrate out of formerly inhabited regions. List As a group, the list of uninhabited places are called the "nonecumene". This is a special geography term which means the uninhabited area of the world. * Virtually all of the Ocean *Virtually all of Antarctica *Most of The Arctic *Most of Greenland *Most of The Sahara * Antipodes Islands * Ashmore and Cartier Islands * Bajo Nuevo Bank * Baker Island * Ball's Pyramid * Balleny Islands * Big Major Cay * Bouvet Island * Much of the interior of Brazil * Caroline Island * Clipperton Island * The semi-arid regions and deserts of Australia * Devon Island * Much of Eastern Oregon * Elephant Island * Elobey Chico * Ernst Thälmann Island * Much of Fiordland, New Zealand * Goa Island * Gough Island * Hans Island * Harmil * Hashima Island * Hatutu * Heard Island and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratovolcano
A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as . Stratovolcanoes are sometimes called composite volcanoes because of their composite stratified structure, built up from sequential outpourings of erupted materials. They are among the most common types of volcanoes, in contrast to the less common shield volca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aethia
''Aethia'' is a genus of four small (85–300g) auklets endemic to the North Pacific Ocean, Bering Sea and Sea of Okhotsk and among some of North America's most abundant seabirds. The relationships between the four true auklets remains unclear. Auklets are threatened by invasive species such as Arctic foxes (''Alopex lagopus'') and Norway rats (''Rattus norvegicus'') because of their high degree of coloniality and crevice-nesting. Taxonomy and evolution The genus ''Aethia'' occurs only in the North Pacific and adjacent waters, mainly in the Bering Sea region. Along with Cassin's auklet (''Ptychoramphus aleuticus'') they comprise the monophyletic tribe Aethinii. Molecular work has not yet resolved the relationship between the ''Aethia'' auklets, but the group is a sister group to Cassin's auklet, which is, in turn, a sister group to the Fraterculine auks (puffins and rhinoceros auklet). The genus ''Aethia'' did not enter into widespread use until the 1960s. Initially, the aukl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleutian Arc
The Aleutian Arc is a large volcanic arc in the U.S. state of Alaska. It consists of a number of active and dormant volcanoes that have formed as a result of subduction along the Aleutian Trench. Although taking its name from the Aleutian Islands, this term is a geologic grouping rather than a geographic one, and the Aleutian Arc extends through the Alaska Peninsula following the Aleutian Range to the Aleutian Islands. The Aleutian Arc reflects subduction of the Pacific Plate beneath the North American Plate. It extends from the Kamchatka Peninsula in the west to the Gulf of Alaska in the east. Unimak Pass at the southwestern end of the Alaska Peninsula marks the eastward transition from an intra-oceanic in the west to a continental arc in the east. Due to the arcuate geometry of the trench, the relative velocity vector changes from almost trench-normal in the Gulf of Alaska to almost trench-parallel in the west. Along the oceanic part of the subduction zone, convergence varie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kasatochi Island
Kasatochi Island ( ale, Qanan-tanax̂; russian: Касаточий остров), also known as Kasatochi volcano, is an active stratovolcano and part of the Andreanof Islands subgroup of the Aleutian Islands of southwestern Alaska. On 7 August 2008, Kasatochi began erupting explosively with an ash plume reaching 45,000 feet. The eruption lasted for 24 hours and destroyed most life on the island. It currently does not support any consistent human population. Kasatochi Island is a member of the Aleutian Islands, which lie above a narrow ridge that separates the Bering Sea from the North Pacific.Gary S. Drew, Donald E. Dragoo, Martin Renner and John F. Piatt Arctic, Antarctic, and Alpine Research, Vol. 42, No. 3 (August 2010), pp. 325-334 It lies at the Atka Pass northwest of the western tip of Atka Island and east of Great Sitkin Island. It is at 52.177° N latitude and 175.508° W longitude, with a summit elevation of 314 m (1030 ft.) It has a land area of 1.9503 sq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
