Learn that subduction of the older, denser oceanic crust leads to the formation of a volcanic island arc and accompanying earthquakes. First and foremost, supervisor - - - . A. at hot spots One gram of carbohydrate contains ____ calories. A, New materials are being added to the asthenosphere. Subduction-caused volcanism and earthquake activity occur frequently along the outer edges of the Pacific Ocean in an area known as the Pacific Ring of Fire. The second important tectonic setting where many volcanoes occur is along or near converging plate boundaries. where an oceanic plate is moving toward a continental plate. Credit: USGS A, New materials are being added to the asthenosphere. O A. along collision zones between two continents B. at sea floor spreading zones O C. above mantle hot spots D. along collision zones between continental and oceanic plates. The largest earthquakes ever recorded were on subduction zones, such as a magnitude 9.5 in Chile in 1960 and a magnitude 9.2 in Alaska in 1964. See more. Expert answered|bheng2x|Points 107| Covers convergent plate boundaries and oceanic plate subduction. Subduction definition, an act or instance of subducting; subtraction or withdrawal. The mantle layer is hotter than the crust, although it is generally found in a solid state, and allows the subducting plate to sink at angles of between 25 and 45 … Subduction may also occur between two regions of oceanic crust, with older, denser sections underthrusting younger, less-dense ones. These earthquakes of the Benioff Zone (or Wadati-Benioff Zone) occur near the upper surface of the descending plate (or slab). help. These hazards affect millions of people around the world, particularly around the edges of the Pacific Ocean, which mainly consist of subduction zones. The massive scale of subduction zones means they can cause enormous earthquakes. B, Earthquakes break apart the ocean floor. Weegy: Kasimir Malevich's images had no reference at all to reality. crustal generation and destruction At the region where the oceanic crust bends and curves into the mantle, a v-shaped region is formed. At which of the following locations does subduction occur? This indicates how strong in your memory this concept is. Subduction zones form where a plate with thinner (less-buoyant) oceanic crust descends beneath a plate with thicker (more-buoyant) continental crust. Share what’s outside your window and all around you. Either no subduction of the continental plate occurs or the continental plate is subducted and melts somewhere around 90 to 140 km down. Plate subduction occurs when two tectonic plates converge and at least one of them is an oceanic plate. What happens at a convergent boundary? Question 1 ... 1. Along other plate boundaries, a process called subduction occurs. C. at continental shelves The main reason of subduction of plates beneath other is the density difference between them and the density difference view the full answer. The crust sticks in some places, storing up energy that is released in earthquakes. User: Where does subduction occur? User: The picture below (Black Square, by ... Weegy: Oracle bones from the Shang dynasty contain the first examples of Chinese writing. A, The mid-ocean ridges. % Two parallel mountain ranges commonly develop above such a subduction zone – a coastal range consisting of sedimentary strata and hard rock lifted out of the sea ( accretionary wedge ), and a volcanic range farther inland ( volcanic arc ). You are viewing an older version of this Read. This answer has been confirmed as correct and helpful. C, Sediments accumulate at the area of spreading. Oceanic plates are formed at divergent plate boundaries from dense basaltic magma. As an oceanic plate is subducted beneath a continental plate, seafloor sediments rich in water and carbon dioxide are carried beneath the overriding plate. The collision of two continental plates occurs when a sea becomes narrower until both plates collide. Collisions occur as lithospheric plates move toward each other. island arc volcanoes occur on the island side of trenches Subduction when ocean crust age, it cools and becomes more … Why does subduction occur at some convergent boundaries but not at others? 1: How does sea-floor spreading occur? This page will be removed in future. A. ice Click, We have moved all content for this concept to. This process results in geohazards, such as earthquakes and volcanoes. In geology, a subduction zone is an area on Earth where two tectonic plates … … This region results in the formation of a deep trench. “Subduction is the primary driver of plate tectonics, yet we still do not fully understand how subduction zones initiate or the budgets of life-supporting elements recycled via subduction. Muscle cramps are often associated with dehydration. Let's return to the Emerald City Incident. Subduction is a process that occurs when two oceanic plates pull apart. Click, SCI.ESC.268 (Ocean-Ocean Convergent Plate Boundaries - Earth Science). To use this website, please enable javascript in your browser. What do subduction zones create? To better organize out content, we have unpublished this concept. Expert Answer 100% (1 rating) Convergent boundaries are one kind of plate boundaries found at earths crust. Most volcanoes on land occur parallel to and inland from the boundary between the two plates. Weegy: One gram of carbohydrate contains 4 CALORIES. Subduction zones are plate tectonic boundaries where two plates converge, and one plate is thrust beneath the other. Shoving two massive slices of Earth's crust together is like rubbing two pieces of sandpaper against each other. The subduction zone eventually becomes inactive The two continents become welded together as they are compressed together over time. These underwater eruptions don't produce big mountainous volcanoes, which is why they are often overlooked as the most volcanically active features on Earth. They occur down to depths of around 670 km at some subduction zones. This conversation has been flagged as incorrect. Earthquakes occur elsewhere in subduction zones, within the subducting plate (“intra-plate”) that often are deeper than about 30 kilometers (19 miles) below the surface, or at the “outer-rise” just a few kilometers below the surface where the plate begins its descent. Earn a little too. I also heard that this is an area of ongoing research and it isn't fully understood what happens at cc convergent boundaries. The farther from the trench, the deeper the earthquakes are. Most water on Earth is in saltwater form. At mid-ocean ridges, basaltic eruptions produce new sea-floor crust. Although the process is not clearly understood,… A. at hot spots B. at mid-ocean ridges C. at continental shelves D. at deep ocean trenches Weegy: At hot spots does subduction occur. This process of convection allows heat generated by radioactive decay to escape from the Earth's interior. From: Introduction to Mineralogy and Petrology, 2014 After collision the oceanic lithosphere breaks off and sinks into the mantle. This process occurs along convergent boundaries at areas called deep-ocean trenches. These compounds may act as fluxes, reducing the melting temperature of magma. Volcanoes associated with subduction zones generally have steep sides and erupt explosively. B. at mid-ocean ridges C. groundwater Volcanic activity occurs at two types of plate boundaries: mid-ocean ridges and subduction zones. We have a new and improved read on this topic. D. at deep ocean trenches, Most water on Earth is in which form? A salvage ship’s sonar locates wreckage at a … Oops, looks like cookies are disabled on your browser. Subduction zones are mainly located in the Pacific Ocean. D, Molten material beneath Earth's crust . Subduction zones produce volcanic arcs, curving chains of steep-sided volcanoes, for example the Aleutian Islands in Alaska. explosive volcanoes occur in arcs of islands. C, Sediments accumulate at the area of spreading. Edited by Brooks Mitchell The results of subduction include mountain folding and volcanoes. B. saltwater Subduction zone is a place where the Earth's crust is broken down and consumes part of the oceanic crust or oceanic plate, which underscores (subduction) under a continent or island arc. These are in slow motion, due to convection in the underlying ductile mantle. As mentioned above, subduction zones form oceanic trenches. D. liquid surface freshwater. B, Earthquakes break apart the ocean floor. In fact, this area has seen the eight most powerful earthquakes ever recorded and is home to over 75 percent of the world's active and dormant volcanoes. According to the theory of plate tectonics, how do two plates interact to form Earth's largest mountain ranges? Subduction occurs at deep ocean trenches. Where does subduction occur? 1: How does sea-floor spreading occur? This is because seafloor spreading – the process by which new oceanic crust is created … Where do subduction zones often occur? D, Molten material beneath Earth's crust rises to the surface. The subduction zone is the place where two lithospheric plates come together, one riding over the other. As the subducting plate moves under its neighboring tectonic plate, gravity pushes it further down and into the mantle layer of the earth. Which challenge did farmers most likely face during the early years ... Use the rules for long division to divide 742 by 11. Subduction is where one lithospheric plate collides and plunges down into the mantle. collide. The Zhou Dynasty used the ... WINDOWPANE is the live-streaming social network that turns your phone into a live broadcast camera for streaming to friends, family, followers, or everyone. At most such boundaries, where two plates collide, the heavier of the two - usually an oceanic one - sinks (or is pulled) under the other plate, a process called subduction. New seafloor is generated from the upper mantle at the mid-oceanic ridges, spreads laterally outward, and is eventually subducted, or consumed, at the margins of ocean basins. According to the theory of plate tectonics, the Earth's lithosphere, its rigid outer shell, is broken into sixteen larger tectonic plates and several smaller plates. Apparently rockes which where once part of the continental plate melt and resurface. a. control the environment ... Blank means protecting natural resources, such as water and trees. An oceanic trench is a depression in the seafloor that is very narrow in width. convergent tectonic plate boundaries or where two tectonic plates come crashing together Why are the subduction zone volcanoes so … In geological terms, subduction is the act of one tectonic plate moving under another tectonic plate at the point of their convergent boundary. 2, Which features form the longest mountain range on Earth?
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