How To Use Subduction In A Sentence
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Both features are characteristic of calc-alkaline magmas erupted in subduction-related volcanic arc environments.
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It is a fault line where a basaltic oceanic plate grinds against a continental plate and dives into the hot core of the earth - a subduction zone.
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Except where subduction zones lie adjacent to mountain belts on continental margins, plate boundaries do not coincide with continental coastlines.
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These rocks are interpreted as a forearc succession that developed in association with north-directed subduction beneath the Lhasa terrane.
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They are interpreted to have been derived from subduction modified lithospheric and asthenospheric mantle sources.
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It is a fault line where a basaltic oceanic plate grinds against a continental plate and dives into the hot core of the earth - a subduction zone.
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The prevalence of Late Jurassic subduction-related igneous rocks indicates that arc formation and accretion orogeny were the most important processes during the evolution of this part of the Internal Hellenides.
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This appears to contradict evidence from other areas, particularly Wales where subduction-related volcanism occurs in the late Tremadoc.
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When convergence rate and subduction rate differ, the trench migrates with respect to a fixed point in the overriding plate interior.
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The previously existing subduction zone is converted into a suture zone marking where the two continents are welded together.
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The tensional stresses in the uplift can be relaxed by, for example, underthrusting in a subduction zone, or contraction in surrounding regions.
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There are two possible tectonic settings for the deep subduction of Indian Plate continental crust in the early Tertiary.
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An alternative mechanism to open the rift basins is subduction rollback of the Indian plate to the west of Thailand.
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The sequence of continental-margin orogen development begins with the subduction of oceanic lithosphere at, or close to, a continental margin.
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It appears to be clear that this activity is traveling north, and the residents of the West Coast should not panic, but in the same breath, should make sure they have proper stores of food and water, battery operated radios, and a good first-aid kit should a devastating quake hit California, or worse, if the "Cascadia Subduction Zone" or Mount Rainier, which is a "stratovolcano" and is one of the most dangerous volcanoes, except for Yellowstone's "Super Volcano" suddenly become active.
Update On Earthquakes And Volcanic Activity Marching Northward
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Where two continents collide neither experiences significant subduction but some crustal thickening occurs and a mountain belt is formed.
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The surface area of a plate is reduced at a subduction zone whereas it is increased along a spreading ridge.
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The most conspicuous outboard structure is the accretionary wedge that lies just continentward of the ocean trench, the bathymetric manifestation of the subduction zone.
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It appears to be clear that this activity is traveling north, and the residents of the West Coast should not panic, but in the same breath, should make sure they have proper stores of food and water, battery operated radios, and a good first-aid kit should a devastating quake hit California, or worse, if the "Cascadia Subduction Zone" or Mount Rainier, which is a "stratovolcano" and is one of the most dangerous volcanoes, except for Yellowstone's "Super Volcano" suddenly become active.
Update On Earthquakes And Volcanic Activity Marching Northward
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The polarity of the postulated Carboniferous subduction at Alexander Island is unknown.
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The surface area of a plate is reduced at a subduction zone whereas it is increased along a spreading ridge.
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Tremors are common throughout Japan, and this one was near the Japan Trench, where the Pacific plate, the speediest of the earth's major slabs of crust, dives beneath the islands of Japan in what's called a subduction zone.
Japan: The 'Big One' hit, but not where they thought it would
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The volcanoes burst to the surface landwards of the ocean trench, rising as they do from the depths of the subduction zone.
THE EARTH: An Intimate History
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Recent studies proposed that the Cretan detachment is a shallowly north-dipping normal fault, which formed subparallel to the subjacent subduction thrust in the Early Miocene.
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Increasing proximity to a subduction zone during plate convergence is indicated by the appearance of felsic tuff.
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These trenches are where subduction is happening.
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This is consistent with the S shape of isotherms in all numerical models simulating temperature evolution in subduction zones.
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The previously existing subduction zone is converted into a suture zone marking where the two continents are welded together.
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Secondly, the geometry of rigid crust that makes up the overriding plate, will have a big impact on how stress is transmitted into the sediments that are caught up in the subduction zone.
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The site of this destruction is another kind of plate boundary: a subduction zone.
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They are interpreted to have been derived from subduction modified lithospheric and asthenospheric mantle sources.
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The low - angle normal faults are subparallel to the subjacent subduction thrusts.
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Some back-arc basalt samples from the East Scotia Sea have high alumina characteristics, suggesting the involvement of subduction-modified mantle sources in their petrogenesis.
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Subduction of oceanic lithosphere beneath a plate carrying continental crust gives rise to a continental-margin orogen.
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Many experiments suggest that ancient subduction-related metasomatism affected OIB mantle sources long before island magmatism.
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The most persuasive evidence for the existence of subduction zones is the narrow Benioff zones of earthquake epicentres dipping away from deep-sea trenches.
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The crust of the continents tends to stand apart from much of the activity at subduction zones.
THE EARTH: An Intimate History
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Slab pull is the theory in which subduction of the earth's crust is thought to pull the plates apart.
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The Lesser Antilles are the island peaks of a 700 km-long volcanic arc of 18 volcanoes, overlying a tectonic plate subduction (under-thrusting) zone.
Pitons Management Area, Saint Lucia
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JPG or can become subducted under the subduction zone - where a plate goes under another plate through plate techtonics.
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Nevertheless, subduction of Africa beneath Iberia starting in the Late Eocene has been proposed.
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Overthrusting, volcanism, and plutonic igneous intrusion were identified as originating above the subduction zone where one plate is forced beneath the edge of its neighbour.
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These extensional faults were reactivated as reverse faults during Neogene compression associated with subduction beneath the North Island.
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Only the upper 4 km of this sequence is accreting at the current subduction zone.
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The surface area of a plate is reduced at a subduction zone whereas it is increased along a spreading ridge.
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Subduction also takes place to the east of the South Sandwich Islands, which are found in the South Atlantic.
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The magmas that formed the batholith were generated in response to the subduction of the Farallon plate beneath the North American plate.
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Subduction volcanoes generally show enrichments of boron in their eruptive products when compared with volcanoes in other tectonic environments.
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Stud - ies of subduction dynamics in China were reviewed simply at last.
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It produces rapid global movement of continental platforms and rapid subduction, obduction, overfolding thin lithosphere platforms.
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Eventually the granite that forms the "basement" of our current continents formed in the crust, probably by fractional crystallization of lighter oxides of silicon and aluminum (accelerated by rapid mixing of crustal materials via subduction, remelting, and metamorphosis).
Ancient Predator Revealed!
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Most of the world's active above-sea volcanoes are located near convergent plate boundaries where subduction is occurring, particularly around the Pacific basin.
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This is why the La Brea tar pits exist and have existed since prehistoric times – the tar is seepage from a vast subduction zone.
Think Progress » Bush Official Dan Bartlett Admits Authorizing Offshore Oil Drilling Will Be Unlikely To Win Over Any GOP Votes
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Earthquakes of 9.0 are exceedingly rare and occur only along subduction zones where an intense force builds, perhaps over hundreds of years, until the plate gives way and a violent temblor results.
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The surface area of a plate is reduced at a subduction zone whereas it is increased along a spreading ridge.
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The surface of Venus appears to be dominated by volcanic hot spots rather than spreading and subduction associated with plate tectonics.
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The most persuasive evidence for the existence of subduction zones is the narrow Benioff zones of earthquake epicentres dipping away from deep-sea trenches.
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The Spontang ophiolitc, for example, is associated with partial subduction of buoyant continental crust.
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Even at ocean - ocean subduction zones, one plate is destroyed, together with the record of magnetic lineations carried on it.
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During flat subduction, the relatively lowdensity antigorite ‘floats’ and is underplated to the base of the continental crust at the Moho geophysical interface.
At it Again
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Overall the temporal progradation of nappe emplacement and high-pressure metamorphism towards the south mimics the southward retreat of the Hellenic subduction zone.
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This allows the ear nerve to be tempered, frequency noise damage, there is a certain subduction.
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The sequence of continental-margin orogen development begins with the subduction of oceanic lithosphere at, or close to, a continental margin.
