what the difference between ocean ridge and subduction zone?
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Mid-ocean ridge volcanoes tend to be linear and look like long, low ridges, while volca- noes at subduction zones tend to be cone- shaped and isolated.
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Discover Subduction Zones. Subduction is the process that destroys old lithosphere. An oceanic plate can descend beneath another oceanic plate - Japan, Indonesia, and the Aleutian Islands are examples of this type of subduction. ... The volcanoes result from melting in the mantle as the subducting plate descends.
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A mid-ocean ridge (MOR) is a seafloor mountain system formed by plate tectonics. It typically has a depth of ~ 2,600 meters (8,500 ft) and rises about two kilometers above the deepest portion of an ocean basin. This feature is where seafloor spreading takes place along a divergent plate boundary.
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Terms in this set (2) Oceanic plates are where there is tectonic plates that are dencer than continental tectonic plate(s). ... Continental plates are where there is tectonic plate that are lighter than oceanic tectonic plate(s).
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New Zealand is on the boundary between the Australian and Pacific tectonic plates. These two plates are being pushed towards each other, but with different results in different parts of New Zealand. To the east of the North Island is a subduction zone, where the Pacific plate plunges down under the Australian plate.
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It is either continental or oceanic. Continental crust is typically 30-50 km thick, whilst oceanic crust is only 5-10 km thick. Oceanic crust is denser, can be subducted and is constantly being destroyed and replaced at plate boundaries.
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The Philippine Sea plate is tectonically unusual in that almost all the boundaries are convergent. The Pacific plate is subducting beneath the Philippine Sea plate to the east while the west/northwestern part of the Philippine Sea plate is subducting beneath the continental Eurasian plate.
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The Mariana Trench is part of the Izu-Bonin-Mariana subduction system that forms the boundary between two tectonic plates. In this system, the western edge of one plate, the Pacific Plate, is subducted (i.e., thrust) beneath the smaller Mariana Plate that lies to the west.
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The Juan de Fuca and Gorda ridges mark the divergent plate boundary (the spreading ridge) with the Pacific plate. The Cascadia trench marks the subduction zone with the North American plate. The arrow shows the direction of convergence. Major Cascade volcanoes are labeled.
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Subduction zones and earthquakes. Subduction zones are plate tectonic boundaries where two plates converge, and one plate is thrust beneath the other. This process results in geohazards, such as earthquakes and volcanoes. ... Earthquakes are caused by movement over an area of the plate interface called the seismogenic zone ...
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At X, the mid-ocean ridge occurs along a boundary between two oceanic plates. The plates are moving apart, causing molten material to repeatedly rise from the mantle, erupt, and harden as solid rock along the center of the ridge.
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The three types of plate boundaries are Convergent, Divergent and Transform. ... An oceanic-oceanic convergent: Here the denser plate goes beneath the other in a subduction zone. A continental-continental convergent: And in this case the thickness of the crust doubles as the convergent makes mountains.
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Subduction zones are likely to form between converging oceanic and continental plates. Subduction zones are likely to form between converging oceanic and continental plates. S w.
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Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor.
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Fast-spreading mid-ocean ridges have an axial high (the "rise crest") whereas slow-spreading ridges have deep axial rift valleys. This difference in morphology is reflected in the ruggedness of the flanks of ridges.
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In the case of a convergent boundary between two oceanic plates, one is usually subducted under the other, and in the process a trench is formed. "The Marianas Trench (paralleling the Mariana Islands), for example, marks where the fast-moving Pacific Plate converges against the slower moving Philippine Plate.
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There are 2 main types of subduction zones: Oceanic-oceanic plate boundaries: If the subducting plate subducts beneath an adjacent oceanic plate, an island arc is formed. Examples include the Aleutians, the Kuriles, Japan, and the Philippines, all located at the northern and western borders of the Pacific plate.