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Luzon Volcanic Arc
The Luzon Volcanic Arc is a volcanic arc, chain of volcanoes in a north–south line across the Luzon Strait from Taiwan to Luzon. The name "Luzon Volcanic Arc" was first proposed by Carl Bowin et al. to describe a series of Miocene to recent volcanoes due to eastward subduction along the Manila Trench for approximately 1,200 km from the Coastal Range in Taiwan south to southern Mindoro in the Philippines. Islands that form part of the arc are the Eastern Coastal Range of Taiwan, Green Island, Taiwan, Orchid Island, Kaotai Rock, Mavudis or Y'ami Island, Mabudis, Siayan Island, Itbayat Island, Diogo Island, Batan Island, Unnamed volcano Ibuhos, Sabtang Island, Babuyan, Didicas, and Camiguin de Babuyanes. At the south end it terminates on Luzon. The geochemistry of a number of volcanoes along the arc have been measured. There are five distinct geochemical domains within the arc (Mindoro, Bataan, Northern Luzon, Babuyan, and Taiwan). The geochemistry of the segments verified t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smith Volcano 1
Smith may refer to: People and fictional characters * Metalsmith, or simply smith, a craftsman fashioning tools or works of art out of various metals * Smith (given name) * Smith (surname), a family name originating in England ** List of people with surname Smith, including fictional characters * Smith (artist) (born 1985), French visual artist Arts and entertainment * Smith (band), an American rock band 1969–1971 * Smith (EP), ''Smith'' (EP), by Tokyo Police Club, 2007 * Smith (play), ''Smith'' (play), a 1909 play by W. Somerset Maugham * Smith (1917 film), ''Smith'' (1917 film), a British silent film based on the play * Smith (1939 film), ''Smith'' (1939 film), a short film * ''Smith!'', a 1969 Disney Western film * Smith (TV series), ''Smith'' (TV series), a 2006 American drama * ''Smith'', a 1932 novel by Warwick Deeping * ''Smith'', a 1967 novel by Leon Garfield and a 1970 TV adaptation Places North America * Smith, Indiana, U.S. * Smith, Kentucky, U.S. * Smith, Nev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diogo Island
Diogo Island known as Di'nem Island is an uninhabited volcanic island in the province of Batanes, the northernmost province in the Philippines. Also known as ''Di'nem'' Island in the native language, Diogo is a lone rock rising out of the sea, with steep cliffs on every side. Dangerous currents make landing there practically impossible. It is an extinct volcano which has suffered heavily from marine erosion.Ferguson, Henry G. (1908-02)"The Philippine Journal of Science, Vol.3 Part 1" p.12. Manila Bureau of Printing, 1908. Geography Diogo is a small, round island over high, about in diameter, lying southeastward of Itbayat Island. It is steep on the western side but has several small islets lying off its eastern side - the outermost being nearly distant. Geology In 1903, Diogo Island was observed to be volcanic, discharging vapor and dark material; but another observation in 1908 indicated that the previous observations were instead small clouds that often hover around the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philippine Mobile Belt
In the geology of the Philippines, the Philippine Mobile Belt is a complex portion of the tectonic boundary between the Eurasian plate and the Philippine Sea plate, comprising most of the country of the Philippines. It includes two subduction zones, the Manila Trench to the west and the Philippine Trench to the east, as well as the Philippine fault system. Within the Belt, a number of crustal blocks or microplates which have been shorn off the adjoining major plates are undergoing massive deformation. Most segments of the Philippines, including northern Luzon, are part of the Philippine Mobile Belt, which is bounded by the Philippine Sea plate to the east, the Molucca Sea Collision Zone to the south, Sunda plate to the southwest, and the Tectonics of the South China Sea, South China Sea Basin to the west and north-west. To the north it ends in eastern Taiwan, the zone of active collision between the North Luzon Trough portion of the Luzon Volcanic Arc and South China. The Phili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megaannum
A year is a unit of time based on how long it takes the Earth to orbit the Sun. In scientific use, the tropical year (approximately 365 solar days, 5 hours, 48 minutes, 45 seconds) and the sidereal year (about 20 minutes longer) are more exact. The modern calendar year, as reckoned according to the Gregorian calendar, approximates the tropical year by using a system of leap years. The term 'year' is also used to indicate other periods of roughly similar duration, such as the lunar year (a roughly 354-day cycle of twelve of the Moon's phasessee lunar calendar), as well as periods loosely associated with the calendar or astronomical year, such as the seasonal year, the fiscal year, the academic year, etc. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by changes in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the planet, four seasons are gener ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Miocene
The Middle Miocene is a sub-epoch of the Miocene epoch (geology), epoch made up of two Stage (stratigraphy), stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene. The sub-epoch lasted from 15.97 ± 0.05 Ma (million years ago) to 11.608 ± 0.005 Ma. During this period, a sharp drop in global temperatures took place. This event is known as the Middle Miocene disruption, Middle Miocene Climatic Transition. For the purpose of establishing European land mammal ages, this sub-epoch is equivalent to the Astaracian age. References External links GeoWhen Database - Middle Miocene Miocene, .02 Miocene geochronology, 02 Langhian, * Serravallian, * {{geochronology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terrigenous Sediment
In oceanography, terrigenous sediments are those derived from the erosion of rocks on land; that is, they are derived from ''terrestrial'' (as opposed to marine) environments. Consisting of sand, mud, and silt carried to sea by rivers, their composition is usually related to their source rocks; deposition of these sediments is largely limited to the continental shelf. Sources of terrigenous sediments include volcanoes, weathering of rocks, wind-blown dust, grinding by glaciers, and sediment carried by rivers or icebergs. Terrigenous sediments are responsible for a significant amount of the salt in today's oceans. Over time rivers continue to carry minerals to the ocean but when water evaporates, it leaves the minerals behind. Since chlorine and sodium are not consumed by biological processes, these two elements constitute the greatest portion of dissolved minerals. Quantity Some 1.35 billion tons, or 8% of global river-borne sediment (16.5-17 billion tons globally), is tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Crust
Continental crust is the layer of igneous, metamorphic, and sedimentary rocks that forms the geological continents and the areas of shallow seabed close to their shores, known as '' continental shelves''. This layer is sometimes called '' sial'' because its bulk composition is richer in aluminium silicates (Al-Si) and has a lower density compared to the oceanic crust, called '' sima'' which is richer in magnesium silicate (Mg-Si) minerals. Changes in seismic wave velocities have shown that at a certain depth (the Conrad discontinuity), there is a reasonably sharp contrast between the more felsic upper continental crust and the lower continental crust, which is more mafic in character. Most continental crust is dry land above sea level. However, 94% of the Zealandia continental crust region is submerged beneath the Pacific Ocean, with New Zealand constituting 93% of the above-water portion. Thickness and density The continental crust consists of various layers, with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calc-alkaline
The calc-alkaline magma series is one of two main subdivisions of the subalkaline magma series, the other subalkaline magma series being the tholeiitic series. A magma series is a series of compositions that describes the evolution of a mafic magma, which is high in magnesium and iron and produces basalt or gabbro, as it fractionally crystallizes to become a felsic magma, which is low in magnesium and iron and produces rhyolite or granite. Calc-alkaline rocks are rich in alkaline earths ( magnesia and calcium oxide) and alkali metals and make up a major part of the crust of the continents. The diverse rock types in the calc-alkaline series include volcanic types such as basalt, andesite, dacite, rhyolite, and also their coarser-grained intrusive equivalents (gabbro, diorite, granodiorite, and granite). They do not include silica-undersaturated, alkalic, or peralkaline rocks. Geochemical characterization Rocks from the calc-alkaline magma series are distinguished from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camiguin De Babuyanes
Camiguin, officially the Province of Camiguin (; ; Kamigin: ''Probinsya ta Kamigin''), is an island province in the Philippines located in the Bohol Sea, about off the northern coast of mainland Mindanao. It is geographically part of Region X, the Northern Mindanao Region of the country and formerly a part of Misamis Oriental province. Camiguin is the second-smallest province in the country in both population and land area after Batanes. The provincial capital is Mambajao, which is also the province's largest municipality in both area and population. The province is famous for its sweet lanzones, to which its annual Lanzones Festival is dedicated and celebrated every third weekend of October. It is home to lush interior forest reserves, collectively known as the Mount Hibok-Hibok Protected Landscape, which has been declared by all Southeast Asian nations as an ASEAN Heritage Park. The province also boasts three National Cultural Treasures, namely, the Old Bonbon Church ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didicas
Didicas Volcano is an active volcanic island in the province of Cagayan in northern Philippines. The island, which was a submarine volcano and re-emerged from the sea in 1952, is NE of Camiguin Island, one of the Babuyan Islands in Luzon Strait. Before 1952, the volcano first breached the ocean surface in 1857.Villamor, Ignacio. "Census of the Philippine Islands, 1918, Vol. I", p. 112. Manila Bureau of Printing, 1920. Physical features Didicas is topped with a lava dome with an elevation of and a base diameter of at sea level. It is at the southern end of the Luzon Volcanic Arc, and like all the volcanoes in the Philippines, is part of the Pacific ring of fire. Eruption history There have been six historical eruptions recorded from the volcano since the 18th century. *1773: The first recorded submarine eruption from the volcano, on what was known as Didicas reefs of the Farallones. *1856 September or October: The first activity started as a column of "smoke" in between the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Babuyan
The Babuyan Islands ( ), also known as the Babuyan Group of Islands, is an archipelago in the Philippines, located in the Luzon Strait north of the main island of Luzon and south of Taiwan. The archipelago consists of five major islands and their surrounding smaller islands. These main islands are, counterclockwise starting from northeast, Babuyan, Calayan, Dalupiri, Fuga, and Camiguin. The Babuyan Islands are separated from Luzon by the Babuyan Channel, and from the province of Batanes to the north by the Balintang Channel. Geography The archipelago, comprising 24 volcanic-coralline islands, has a total area of about . The largest of these is Calayan with an area of , while the highest peak in the island group is Mount Pangasun () on Babuyan Claro. Islands The table below shows the islands of Babuyan and their adjoining islets and rocks, along with land areas and highest elevation: Geology The eastern islands of the archipelago are part of the Luzon Volcanic Arc. Thr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
