which phenomenon can explain the presence of volcanoes in the middle of the pacific ocean?
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Vents and Volcanoes Vents and Volcanoes. Most of the active volcanoes on Earth are located underwater, along the aptly named Ring of Fire in the Pacific Ocean. Volcanoes and hydrothermal vents are the result of plate tectonics.
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What name is given to the area where volcanoes often occur because convection in the earths mantle produces a column of magma rises into the crust? What name is given to the area where volcanoes often occur because convection in the earth's mantle produces a column of magma that rises into the crust?agma in the mantle rises through the crust because pressure is always wanted to be released and when there is a weak spot in the crust magma automatically rushes to the surfa … ce. 2 people found this useful.
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The Ring of Fire is a string of underwater volcanoes and earthquake sites around the edges of the Pacific Ocean. Did you know that most of the active volcanoes on Earth are located underwater, along the aptly named Ring of Fire in the Pacific Ocean? The Ring of Fire includes more than 450 volcanoes. It stretches for nearly 25,000 miles, running in the shape of a horseshoe (as opposed to an actual ring) from the southern tip of South America, along the west coast of North America, across the Bering Strait, down through Japan, and into New Zealand. The Ring of Fire is the result of plate tectonics. Much of the volcanic activity occurs along subduction zones which are convergent plate boundaries where two tectonic plates come together. The heavier plate is shoved (or subducted) under the other plate. When this happens, melting of the plates produces magma. The magma rises up through the overlying plate, erupting to the surface as a volcano.
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Where are most volcanoes are found? Volcanoes are located throughout most of the world. The most active volcanoes are found on the so-called ring of fire in Pacific Ocean. Indonesia has several volcanoes inclu … ding Krakatoa. Hawaii's Kilauea produces the most lava of all active volcanoes in the world. North America has Mt. St. Helens and Mt. Rainier in Washington, USA. Mexico has several including Paricutin parícutin And nevado De. Toluca europe Has. Mt. Etna, generally volcanoes are located near tectonic plates that are converging or. diverging
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Where Does Volcanic Activity Occur? Plate boundary volcanism. Volcanic activity occurs at two types of plate boundaries: mid-ocean ridges and subduction zones. At mid-ocean ridges, basaltic eruptions produce new sea-floor crust. These underwater eruptions don't produce big mountainous volcanoes, which is why they are often overlooked as the most volcanically active features on Earth.
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Why Do Earthquakes and Volcanoes Happen Mostly in the Same Place? A: Most volcanoes occur in the basin of the Pacific Ocean, also known as the Ring of Fire. Most volcanoes are situated on the edges of tectonic plates. One of...
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"What is the ""Ring of Fire?""" Subduction of oceanic lithosphere. Most of the Earth's volcanoes are located around the Pacific Ring of Fire because that the location of most of the Earth's subduction zones.A subduction zone is a place where one plate of oceanic lithosphere (= the crust + uppermost mantle) is shoved under another plate.The downgoing plate is always the oceanic one.ubduction of oceanic lithosphere. Most of the Earth's volcanoes are located around the Pacific Ring of Fire because that the location of most of the Earth's subduction zones.
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High School Earth Science/Volcanic Activity The islands of Hawaii formed over a hot spot and are not located on the Pacific Ring of Fire (Figure 8.7). The Hawaiian islands are the exposed peaks of a great chain of volcanoes that were formed over millions of years. The islands are thought to lie directly above a column of hot rock called a mantle plume.olcanic Hot Spots [edit]. Although most volcanic activity on Earth occurs at plate boundaries, there are some volcanically active spots that are in the middle of a tectonic plate. These areas are called hot spots.
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TEACHER SALARIES - ARE THEY COMPETITIVE? In addition to salary differences across professions, teacher salaries vary by steps, and across districts, by geographic location and size. The average teacher salary in 1991 at the highest level was 181 percent of that at the entry level, with increases at each reported step (Table 1).In 1988 the Northeast and West shared the highest rank for salaries (Figure 1). By 1991, the Northeast had moved ahead of the West at all reported steps.fter declining in the 1970's and rising in the 1980's, teacher salaries in 1988, adjusted for inflation, reached the high they had attained in 1972 (Condition of Education, 1992).
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Where are most volcanoes located? The Pacific Ring of Fire is an area of frequent earthquakes and volcanic eruptions encircling the basin of the Pacific Ocean. The Ring of Fire has 452 volcanoes and is home to over 50% of the world's active and dormant volcanoes.
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Ring of Fire Three-fourths of Earth's active and dormant volcanoes -- including Mount St. Helens, which is featured in the program Hell's Crust -- lie along this arc, at the margins of the Pacific Ocean, where the large Pacific plate and other tectonic plates dive beneath yet other plates.
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- Mid-oceanic ridge of the south Pacific. As the hot asthenosphere rises to shallow levels, it decompresses and melts to produce basalt magmas. These magmas pond in crustal magma chambers where they are periodically tapped by vertical fractures that provide conduits for the rapid rise of magma to the surface.
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- Keywords: psychotherapy outcome, psychotherapy. process, psychoanalysis, psychodynamic therapy, meta-. analysis. T. here is a belief in some quarters that psychodynamic. concepts and treatments lack empirical support or. that scientiﬁc evidence shows that other forms of. treatment are more effective.
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Subduction Zone Volcanism Volcanoes form where the subducting oceanic plate gets hot. enough to “sweat” fluids and initiate melting. (Modified from Lillie, 2005.) Subduction zones produce volcanic arcs, curving chains of steep-sided volcanoes, for example the Aleutian Islands in Alaska. Volcanoes associated with subduction zones generally have steep sides and erupt explosively. Why are the subduction zone volcanoes so steep? The lavas erupted there are rich in silica.
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Where are Volcanoes mostly located at? Many of the world's active volcanoes are located around the edges of the Pacific Ocean: the West Coast of the Americas; the East Coast of Siberia, Japan, the Philippines, and Indonesia; and in island chains from New Guinea to New Zealand--the so-called Ring of Fire (diagram to left).
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- Mid-Ocean Ridges. The mid-ocean ridge is a continuous chain of volcanoes on the ocean floor where lava erupts and the crust of the Earth is created. Nearly every day, somewhere on the crest of the mid-ocean ridge, there is likely to be an eruption of lava or an intrusion of magma that builds the ocean crust.Begin the interactive ».he mid-ocean ridge is a continuous chain of volcanoes on the ocean floor where lava erupts and the crust of the Earth is created.
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Composite Volcano The volcanoes form on the continental side of a subduction zone. The melting oceanic crust forms pools of molten rock in a magma chamber. The magma, molten rock, in the magma chamber is lighter than the volcano rocks that surround it.
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What is the Biggest Ocean in the World? The Pacific Ocean is surrounded by a hotbed of volcanic activity referred to as the Ring of Fire; an arc of volcanoes formed around its borders. Almost the entire boundary of the Pacific Ocean is a subduction zone; a boundary between two tectonic plates. The volcanoes on the west coast of North America are a result of the Pacific Plate (under the Pacific Ocean) colliding with the North American Plate.
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What causes volcanic action? Divergent plate boundaries usually occur deep in the oceans. The mid-oceanic ridges are an example of this type of volcanic action. Occasionally, as is the case with Iceland, oceanic ridges rise above the surface of the ocean. Contrarily, convergent plate movement causes more visible volcanic action. Famous volcanoes, such as Vesuvius or Mount St. Helens, were caused by converging tectonic plates. In a process known as subduction, an oceanic plate collides with, and slides under, a continental plate.
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- Volcanoes usually occur along the boundaries of tectonic plates but they can also occur far from any boundary, over a 'hot spot'. The Hawaiian Islands are a string of volcanoe … s that formed as the Pacific Plate slowly moved over a hot spot. The hot spot is still active and the plate is still moving.olcanoes typically are found at convergent boundaries and  divergent boundaries, like the Ring of Fire around the Pacific  Plate. Hot spots around the world account for the … third place where  volcanoes can occur. 1 person found this useful.
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Where can volcanoes occur? Volcanoes can also occur at hot spots, such as at the areas of the Hawaiian islands and Yellowstone in America. This type of volcano forms when magma from the mantle rises to Earth's surface through a certain spot in the middle of the plate (i.e., the Pacific Plate for the Hawaiian Islands).olcanoes usually occur where there are collision of the tectonic plates. There are 52 tectonic plates which either pull (gap and crack) or push (volcano). Volcanoes are actually tectonic plates which have magmas beneath their outer surface.
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Geography of the Pacific Ocean The Pacific Ocean has a highly varied topography that consists of oceanic ridges, trenches and long seamount chains that are formed by hotspot volcanoes under the Earth's surface. 1  An example of these seamounts that are above the ocean's surface are the islands of Hawaii.
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PLATE TECTONICS ACTIVITY A subduction zone also occurs when Ocean plates converge, resulting in the formation of curved chains of volcanic islands or Island Arcs. The arc of islands is curved concavely in the direction of the movement of the down-going plate. The Ring of Fire is the name given to the volcanic islands around the Pacific that are the result of the ...
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Tectonics of Indonesia About one-fourth of Indonesia's volcanoes are north of the Sunda arc in an area with complex tectonics. Several small plates have produced mostly north-south trending subduction zones. The volcanoes of Sulawesi, Halmahera, and Sangihe are the result of these subduction zones.ost of these volcanoes are the result of subduction of the Australia Plate beneath the Eurasia Plate. Volcanoes in the Banda Sea result from subduction of the Pacific Plate under the Eurasia Plate.
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Volcano Finally, volcanoes can be caused by mantle plumes, so-called hotspots these hotspots can occur far from plate boundaries, such as the Hawaiian Islands. Interestingly, hotspot volcanoes are also found elsewhere in the solar system, especially on rocky planets and moons.ivergent plate boundaries Edit. At the mid-oceanic ridges, two tectonic plates diverge from one another. New oceanic crust is being formed by hot molten rock slowly cooling down and solidifying. In these places, the crust is very thin and eruptions occur frequently because of the pull by the tectonic plates.
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- The Ring of Fire is a zone of intense tectonic activity around the edges of the Pacific Ocean. Most of the world's earthquakes and volcanoes occur here as a result of subduction, the sinking of one tectonic plate under another.