A subduction zone is the place where oceanic plate margin is being pushed under a continental plate or a less dense oceanic plate. Have a look at the western side of South America (on the pacific coast), see the mountain ranges and volcanoe...
http://wiki.answers.com/Q/What_is_a_subduction_zone
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When this happens, subduction terminates along the collision zone, the trench disappears, and the continents collide, resulting in the birth of a new mountain range. ... When this happens, the ridge slowly moves toward the trench and the whole plate is eventually drawn down into the mantle, causing a global rearrangement...
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www.platetectonics.com/book/page_12.asp
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Because the convergent plate boundary along the Northwest coast is a subduction zone, we need to examine the parts of a subduction zone in a little more detail.
http://www.wenval.cc/rdawes/Basics/platetectonics.html#...
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LIFE IN THE SUBDUCTION ZONE:; THE RECENT NISQUALLY QUAKE AND FEDERAL; EFFORTS TO REDUCE EARTHQUAKE HAZARDS; HEARING; BEFORE THE; SUBCOMMITTEE ON RESEARCH; COMMITTEE ON SCIENCE; HOUSE OF REPRESENTATIVES; ONE HUNDRED SEVENTH CONGRESS;
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commdocs.house.gov/committees/science/hsy71801.000/hsy7...
commdocs.house.gov/committees/science/hsy71801.000/hsy71801_0.htm
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Seattle WA (SPX) Jan 31, 2006 - The most powerful earthquakes ¿ such as those that shook Indonesia in 2004, Alaska in 1964, Chile in 1960 and the Pacific Northwest in 1700 ¿ occur in subduction zones, areas of the sea floor just offshore where two tectonic plates meet and one dives beneath the other. ... "In many of them,
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www.terradaily.com/reports/Sediment_Could_Be_Major_Fact...
www.terradaily.com/reports/Sediment_Could_Be_Major_Factor_In_Big_Subduction_Zone_Earthquakes.html
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As an oceanic plate descends to hotter depths beneath the overriding plate, it is heated and releases water. The presence of hot, water-rich liquids causes the overlying rock to begin melting. Volcanic eruptions happen when magma from these chambers reaches the surface. ... ! Click the image to see the animation...
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www.classzone.com/books/earth_science/terc/content/visu...
www.classzone.com/books/earth_science/terc/content/visualizations/es0902/es0902page01.cfm?chapter_no=visualization
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When the two plates collide, the oceanic plate is forced underneath the continental plate, down towards the hot mantle. This "forcing underneath" is called "subduction". The place where it happens is called a "subduction zone", (see next page). ...
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www.gcsescience.com/pwav62.htm
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The location of the recent earthquake that triggered a deadly tsunami in the Indian Ocean came as no surprise to geologists, says Anne Meltzer, a world-renowned seismologist at Lehigh University. ... Subduction zones, which are caused when tectonic plates collide, produce the most powerful earthquakes, ... Hayward Fault Zone...
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www.sciencedaily.com/releases/2005/01/050106111730.htm
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USGS Earthquake Hazards Program, responsible for monitoring, reporting, and researching earthquakes and earthquake hazards ... The subduction zone is the place where two lithospheric plates come together, one riding over the other. Most volcanoes on land occur parallel to and inland from the boundary between the two plates.
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earthquake.usgs.gov/learning/glossary.php?term=subducti...
earthquake.usgs.gov/learning/glossary.php?term=subduction%20zone
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