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  Encyclopedia of Keywords > Time > Events > Earthquakes > Subduction > Oceanic   Michael Charnine

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    This Review contains major "Oceanic"- related terms, short phrases and links grouped together in the form of Encyclopedia article.


  1. Proto Oceanic (POc) is the immediate ancestor of the Oceanic subgroup of the Austronesian language family.
  2. The Oceanic was then in her twelfth year of operation, making the regular Southampton - Cherbourg - Queenstown - New York run twice monthly.
  3. It is Proto Oceanic, the immediate ancestor of the Oceanic languages, that is associated with an early phase of the Lapita Cultural Complex.
  4. The Oceanic were shut out in the final game 4-0.


  1. As the oceanic crust sinks, a deep oceanic trench, or valley, is formed at the edge of the continent. (Web site)
  2. The Physeteridae occupy mainly deep, oceanic waters over 3,300 ft (1,000 m) in depth, (off the edge of the continental shelf.
  3. A trench can form wherever subduction occurs—where oceanic crust sinks beneath the edge of a continent, or where it sinks beneath another oceanic plate.


  1. As the margins spread, the flow will cool and subside, forming an oceanic area like the Red Sea.
  2. Ophiolite Genesis Ophiolite suites, or complexes, are sections of oceanic crust that have been obducted [or forced up] onto the margins of continental crust.
  3. Oceanic Trenches - deep trenches along the margins of continents, particularly surrounding the Pacific Ocean. (Web site)


  1. The transition from continental to oceanic crust commonly occurs within the outer part of the margin, called continental rise.
  2. The chert and limestone were scraped off of an oceanic plate and accreted to the margin of China (again, prior to the opening of the South China Sea). (Web site)

River Dolphins

  1. Both the killer whale and the pilot whale are members of the family Delphinidae, which includes all oceanic and some coastal and river dolphins. (Web site)
  2. Any member of the families Delphinidae and Platanistoidea (oceanic and river dolphins), 3.


  1. Based on a compilation of data from 1979 to 2001, many cetaceans within the Pacific EEZ of Costa Rica occur in both oceanic and coastal waters. (Web site)


  1. Oceanic crust is thus created from the mantle at the crest of the mid-ocean ridge system, a volcanic submarine rise.
  2. In a typical "island-arc" environment, volcanoes lie along the crest of an arcuate, crustal ridge bounded on its convex side by a deep oceanic trench. (Web site)


  1. Magma rises to surface and forms new oceanic crust.
  2. At the surface, the topographic expression is commonly an oceanic trench on the oceanic side, and a mountain range on the continental side.
  3. The upper plate that remains on the surface may be continental crust or oceanic crust.


  1. Oceanic crust is the thin layer of solidified volcanic basalt that covers the Earth's mantle where there are no continents. (Web site)
  2. Just as a thick board would rise above the water higher than a thin one, the thick continental crust rises higher than the thin oceanic crust.
  3. Without compressive forces, oceanic crust as thin as 1.5-2 km would subside and form a depression, rather than a ridge.


  1. The other process proposed to contribute to the formation of new oceanic crust at mid-ocean ridges is the "mantle conveyor" (see image).
  2. Formation of ocean basins, oceanic influences on climate; currents; waves and tides; human relationship to and impact on the ocean; resources. (Web site)
  3. Since the 1960s, geologists have debated the formation and origin of these large oceanic plateaus. (Web site)

Passive Margin

  1. The transition between the continental and oceanic crust that was originally created by rifting is known as a passive margin. (Web site)
  2. A passive margin is the transition between oceanic and continental crust which is not an active plate margin. (Web site)
  3. While a weld between oceanic and continental crusts are called a passive margin, it is not an inactive margin. (Web site)


  1. When the plates pull apart they form Ridges or Rises in Oceanic Crust and rifts [Gulf of California] in the Continental Crust. (Web site)
  2. According to Jefferson and Schiro (1997), Stenella attenuata is the most common species of small cetacean in oceanic waters of the Gulf of Mexico.
  3. In the same area, the crust has rifted apart along the Red Sea, and the Gulf of Aden to form new oceanic ridges. (Web site)


  1. Oceanic core complexes are associated with faults along slow-spreading mid-ocean ridges. (Web site)
  2. They are strike-slip faults, running transversely from the faults across the oceanic ridge which they have displaced. (Web site)
  3. Topics covered include supercontinents, superplumes, Australia, oceanic plates and faults, plate tectonic models, and stirring by mantle convection. (Web site)


  1. Convergent boundaries are boundaries at which crust is destroyed by the subduction of oceanic crust beneath continental crust or other oceanic crust.
  2. Divergent Plate Boundaries - These are boundaries where plates move away from each other, and where new oceanic crust and lithosphere are created. (Web site)
  3. Sedimentary deposits are commonly found at the boundaries between the continental and oceanic crust. (Web site)

Oceanic Islands

  1. Likewise, the criterion that each be a continuous landmass is often disregarded by the inclusion of the continental shelf and oceanic islands. (Web site)
  2. Frogs are found nearly worldwide, but they do not occur in Antarctica and are not present on many oceanic islands.
  3. Because of their size, shield volcanoes usually make up the bulk of oceanic islands.


  1. The distribution of atolls around the globe is instructive: they are mostly limited to the oceanic basins of the Pacific and Indian oceans.
  2. Oceanic crust meets oceanic crust in the Pacific and it seems to be a matter of chance as to which plate is subducted.
  3. East of 150° W. the Pacific has few islands; the oceanic islands are volcanic, and coral formations are of course scanty. (Web site)

Third Type

  1. A third type of oceanic island is formed over volcanic hotspots.
  2. A third type of volcanic oceanic island is formed over volcanic hotspots.


  1. The continental crust and oceanic crust differ in what types of these rocks are present. (Web site)
  2. The upper part is called the crust, again of two types (continental and oceanic). (Web site)
  3. The types of lithosphere (continental or oceanic) that are involved at the boundary. (Web site)


  1. As the oceanic crust is subducted, it descends into the mantle where temperatures are generally higher than near the surface of the planet.
  2. Most of the continental volcanoes found on our planet are located along the edge of the continents where oceanic crust is being actively subducted. (Web site)
  3. Everywhere in the Planet witnessed these changes in Continental Geo-positioning and the hardening of the young Oceanic crust as Ice cooled things down.


  1. In this type of a collision, one of the plates is subducted under the other creating a deep oceanic trench. (Web site)
  2. The subduction zone created by the collision of two oceanic plates—the Pacific plate and the Philippine plate—can also create a trench. (Web site)
  3. The results show that the segments of oceanic crust formed at least 80 My before the collision that produced the Urals. (Web site)


  1. The crustal structures beneath the Red Sea and the Gulf of California are very similar and closer to oceanic than continental.
  2. This is drawing it closer to the Eurasian Plate, causing subduction where oceanic crust is converging with continental crust (e.g. (Web site)
  3. Areas with Subpolar Oceanic climates feature an oceanic climate but are usually located closer to Polar regions.


  1. Island arcs consist of materials that tend to be transitional between oceanic and continental crust in both thickness and composition.
  2. It also should not be surprising to learn that oceanic and continental crusts differ both in thickness and in composition. (Web site)
  3. Because the partial melt is basaltic in composition, the new crust is oceanic.


  1. Since low-viscosity magma is typically low in silica, shield volcanoes are more common in oceanic than continental settings. (Web site)
  2. The oceanic plates are made of dense, basaltic rock composed predominately of silica and magnesium.
  3. Oceanic crust has lots of silica and iron and may be referred to as simatic. (Web site)

Igneous Rocks

  1. Second, the bulk of the Earth's crust, both continental and oceanic, is made of igneous rocks. (Web site)
  2. A wide variety of igneous rocks occur in the continental lithosphere, a reflection of its heterogeneous nature compared to oceanic lithosphere.

West Coast

  1. Donegal Bay is a major indentation on the west coast of Ireland, as a result of oceanic and coastal processes.
  2. Volcanism along the west coast of South America is the result of subduction of the oceanic Nazca plate beneath the South American plate.
  3. An oceanic climate prevails off the west coast from the Queen Charlotte Islands to Vancouver Island (Brouillet and Whetstone 1993).


  1. The oceanic or limnological mixed layer is a layer in which active turbulence has homogenized some range of depths. (Web site)
  2. At depths of 80-120 km water release by the slab is believed to lead to partial melting of the oceanic crust. (Web site)
  3. Thus, old oceanic lithosphere may have significant strength to depths in excess of 60 km or about half that of the thermal lithosphere. (Web site)


  1. As the oceanic plate sinks deeper and deeper into Earth, intense pressure and heat in the mantle melts the leading edge of rock on the plate.
  2. As the subducting oceanic crust melts as it goes deeper into the Earth, the newly-created magma rises to the surface and forms volcanoes. (Web site)
  3. The location where the two oceanic plates actually meet become deeper and deeper creating trenches with each successive action.


  1. Breeding Range: The Black Noddy is a tropical bird breeding on oceanic and coastal islands in the tropical parts of the Atlantic, Pacific, and Indian Oceans.
  2. This shark species is found in the oceanic waters of the Atlantic, Pacific and Indian Oceans. (Web site)
  3. Habitat: Atlantic Spotted Dolphins occur in both coastal and oceanic waters. (Web site)

Atlantic Ocean

  1. The Puerto Rico Trench is an oceanic trench located on the boundary between the Caribbean Sea and the Atlantic Ocean.
  2. Then, magma upwelling at the Mid-Atlantic Ridge began to produce oceanic crust, parting the continents to form the Atlantic Ocean. (Web site)


  1. Meanwhile, magma is continually rising along the mid-oceanic ridges, where the "recycling" process is completed by the creation of new oceanic crust.
  2. One slab of oceanic lithosphere is pushed beneath another in a process called subduction. (Web site)
  3. The oceanic plate is forced down into the mantle in a process known as "subduction". (Web site)


  1. When both of the plates are made of oceanic crust, convergence is associated with island arcs such as the Solomon Islands.
  2. When both of the plates are made of oceanic crust, convergence is associated with island arc s such as the Solomon Islands. (Web site)
  3. Usually associated with subduction, convergence typically occurs in the ocean, creating an oceanic trench. (Web site)

Oceanic Tectonic Plate Beneath

  1. The Pacific Plate is an oceanic tectonic plate beneath the Pacific Ocean, and at 103 million square kilometres, the largest of all tectonic plates [1].
  2. The Cocos Plate is an oceanic tectonic plate beneath the Pacific Ocean off the west coast of Central America. (Web site)

South America

  1. The Nazca Plate is an oceanic tectonic plate beneath the Pacific Ocean off the west coast of South America.
  2. Mélanges occur where plates of oceanic crust subduct beneath plates of continental crust, as along the western coast of South America. (Web site)
  3. As the Atlantic Ocean widened, North America and South America were pushed westward, separated for a time by oceanic crust.


  1. Both the place of the Oceanic subgroup within the wider Austronesian family, and the internal subgrouping of Oceanic itself are dealt with. (Web site)
  2. The family of Central-Eastern Oceanic languages is a subgroup of the Oceanic languages.
  3. The family of Western Oceanic languages is a subgroup of the Oceanic languages. (Web site)


  1. Brown = oceanic crust of Australian plate.


  1. Continental Crust - the continents, made up of granitic rock, lighter than basalt so it floats on the oceanic crust.
  2. The continental crust is less dense or lighter than the oceanic crust and "floats" above it.
  3. Continental crust, composed of lighter, less dense materials, is too light to undergo subduction and so overrides oceanic crust or uplifts. (Web site)


  1. Lithospheric plates are much thicker than oceanic or continental crust.
  2. Continental crust is much older, thicker and less dense than oceanic crust.
  3. Thinking about the different types of plate boundaries, explain why continental crust is much thicker than oceanic crust.


  1. This crust is very thick compared to oceanic crust which forms part of the outermost shell of the planet. (Web site)
  2. The Continental crust is thicker than the Oceanic crust, about 19 miles(30 km) thick.
  3. Continetal plate is thick and composed of sediments and volcanic rocks, oceanic crust is thinner and consist only of a certain kind of volcanic rocks.

Oceanic Juan

  1. Volcanoes are formed along the US coast as the oceanic Juan de Fuce plate plunges below the continental North American plate.


  1. Situated in the Cascade Volcanic Arc, the volcano was created by subduction of the oceanic Juan de Fuca Plate under the North American Plate.
  2. For example, Mount St. Helens is found inland from the margin between the oceanic Juan de Fuca Plate and the continental North American Plate. (Web site)
  3. Caused by the subduction of the oceanic Juan de Fuca plate under the continental North American plate, on the West Coast of the United States.


  1. Below a certain depth, the heat from the mantle layer will melt the oceanic plate and pieces of the continental plate, and boil the water.
  2. As the oceanic crust is forced deeper into the earth, high heat and pressure melt the rock and form magma. (Web site)
  3. The deep sea trench is the site of a subduction zone, where oceanic crust is being carried down into the mantle, where it begins to melt.


  1. Oceanic to oceanic plate convergence--the more dense plate subducts under the less dense plate, eventually melting into the mantle.
  2. When two plates of oceanic lithosphere run into one another the subducting plate is pushed to depths where it causes melting to occur. (Web site)
  3. Water is driven out of the oceanic lithosphere in subduction zones, and it causes melting in the overlying mantle.


  1. Earthquake s, volcanic activity, mountain -building, and oceanic trench formation occur along plate boundaries. (Web site)
  2. On August 16, 1868, an earthquake with a magnitude estimated at 8.5 struck the oceanic trench currently known as the Peru-Chile Trench. (Web site)
  3. This can happen to the oceanic crust in the ocean basins, but will only cause an earthquake with a hot spot.


  1. Earthquakes can happen in the plate boundary where two tectonic plates smash, grind and collide each other or the break along fault. (Web site)
  2. These major earthquakes are attributed to subduction of the oceanic Juan de Fuca plate under western Washington.
  3. This lecture concludes by showing how plate tectonics explains earthquakes, mountain building, volcanoes, and oceanic trenches.


  1. Oceanic crust - The crust under the oceans is about 10 km thick and is generally made up of rock rich in iron and magnesium.
  2. The present results indicate that oceanic islands are anomalous, and that differences between oceans and continents need not extend below 200 km. (Web site)
  3. Oceanic crust (the crust under the oceans) is thinner and denser than continental crust. (Web site)


  1. It is separated into two types: continental crust (which underlies the continents) and oceanic crust (which underlies the oceans).
  2. Plate tectonics also enabled geologists to explain the origins of the oceanic crust and the continents.
  3. Although the crust of the continents is thick, it breaks more easily than oceanic crust, and supercontinents broke quickly into smaller pieces.


  1. In the Labrador Sea some anomalies occur in an area of continental crust that had previously been defined as oceanic (Grant, 1980). (Web site)
  2. First, the hypothesis that the anomalies are produced in the upper 500 meters of oceanic crust has had to be abandoned. (Web site)
  3. Explanation of these anomalies is sought by examining an oceanic area in an early stage of development-the Red Sea.


  1. Time > Events > Earthquakes > Subduction
  2. Crust
  3. Plates
  4. Continental
  5. Mantle

Related Keywords

    * Asthenosphere * Beneath * Boundary * Climate * Continental * Continental Plate * Continental Plates * Crust * Delphinidae * Dense * Denser * Dolphin * Dolphins * Earth * Heavier * Magma * Mantle * Nazca * Ocean * Oceanic Crust * Oceanic Dolphins * Oceanic Dolphin Family * Oceanic Languages * Oceanic Lithosphere * Oceanic Plate * Oceanic Plates * Oceanic Ridge * Plate * Plates * Plate Boundaries * Plate Boundary * Ridge * Ridges * Rocks * Subducting * Subduction * Subduction Zone * Subduction Zones * Tectonic Plate * Tectonic Plates * Thickness * Volcanoes * Zone * Zones
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  Originally created: October 31, 2006.
  Links checked: February 03, 2013.
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