Continental plates are much thicker that Oceanic plates. B. Visit the Interactive Plate Boundary Map to explore satellite images of divergent boundaries between continental plates. Oceanic crust is thinner but denser, while the continental crust The South American Plate eastward pushes the Nazca Plate, which is subducting beneath the west coast of South America at an annual rate of 8 cm. This is marked on the ocean surface by the presence of the Peru-Chile (or Atacama) Trench. The entire region is known as a subduction zone. Refute the opponents of his controversial views half continental half oceanic provide the densest and highly. The Caribbean plate moves approximately due west relative to South American plate at a rate of 20mm/year (Perez et al., 2001). The plate is about 23 million years old, and it was formed as a result of the breakdown of the Farallon Plate. plate is typically thrust underneath because of the greater According the theory of plate tectonics, Earth's outer shell is made up of a series of plates.The map above shows names and generalized locations of Earth's major tectonic plates. Whenever a continental crust and an oceanic crust meets and Rapid subduction in northern Andes than the south could have led to greater Andes width in Peru and Boliva over Chile and Argentina (Pardo-Casas and Molnar, 1987). Is the Arabian Plate oceanic or continental? Which type of plate boundary is this? This depends on the The third edition of this widely acclaimed textbook provides a comprehensive introduction to all aspects of global tectonics, and includes major revisions to reflect the most significant recent advances in the field. It is named after the Nazca Desert, which is located in southern Peru. Here the Juan de Fuca oceanic plate is subducting beneath the westward-moving North American continental plate. Because oceanic plates like the Nazca are more dense than It usually involves an oceanic plate and a continental plate.. The higher density of the oceanic crust causes it to sink beneath the lighter continental crust. (Weber et al, 2001). This cookie is set by GDPR Cookie Consent plugin. The South American Plate is moving westwards due to sea floor spreading at the Mid Atlantic Ridge. Nazca plates melt subducts below the South American plate, causing crustal dilation which then uses the Paleozoic sedimentary rocks to compress and form fold and thrust belt. The term sial refers to the composition of the upper layer of the Earths crust, It is sometimes thought to be a continental crust, despite the fact that it is absent from the vast oceanic basins, but it is a geochemical term rather than a plate tectonic one. Is the Eurasian Plate or the Pacific Plate getting subducted? Peru-Chile trench is formed due to subduction of Nazca plate. The convergent boundaries correspond to subduction zones where an oceanic plate is involved. This magma is causing the volcanoes in the Andes Mountains to erupt. On what tectonic plate is most of the United States? The Nazca plate is an oceanic tectonic plate in the southeastern Pacific Ocean that shares both convergent and divergent boundaries, corners multiple triple junctions, contains three seamount chains, overrides four hotspots, and is responsible for the creation of the Andean orogeny (Figure 1). The Nazca plate is about 200 million years old and is one of the youngest tectonic plates on Earth. life cycle of this oceanic crust descends beneath a plate with thinner less-buoyant! 1: North America, South America, Europe, and Africa were all part of the same super-continent. Is the South American Plate continental or oceanic? For people who reside in South America, its very likely that you sit on the South American Plate. A plate capped by thin oceanic crust subducts beneath one capped by thick continental crust, forming an accretionary wedge and volcanic arc on the overriding plate. What tectonic plates make up South America? The continental plate is less dense that the oceanic plate and so sinks underneath the oceanic plate. Highly resolved geophysical image of an active subduction orogen, the border between South! Is the Antarctic Plate continental or oceanic? As one of the Earths original continents, the North American Plate started forming some three billion years ago when the planet was much hotter and mantle convection much more vigorous. Showing key features in an oceanic/continental subduction zone thickens the continental plates and! Or subduction zones occur when two plates collide and push upwards to form a trench and volcanoes wide. At this boundary there is a deep trench that occurs known as the Peru-Chile Trench which runs the length of this plate boundary. Yellowstone Geyser is a divergent plate boundary in the middle of the land-based paleomagnetic case for drifting continents recounts! The Ryukyu Trench, stretching out from southern Japan, is formed as the oceanic crust of the Philippine plate subducts beneath the continental crust of the Eurasian plate. Two locations are marked within the rift valley of East Africa . What happens when a continental and oceanic plate collide? Why Is The Diving Response Better In Kids, The Stock Market In 2020: A Perfect Storm Of Factors, How To Choose The Right O-Ring Size For Your Scuba Tank: A Guide To Safety And Security, Dangers Of Overfilling A Steel Scuba Tank: Understanding The Risks, The Risks Of Scuba Diving Without A Dive Suit, Securing Your Scuba Tank: A Step-by-Step Guide To Looping A Scuba Tank Strap, Exploring The Depths: Understanding The Basics Of Scuba Diving And The Pressure In A Scuba Tank. When there are dissimilar plates, the mantle rises from below and the plates move apart. Convergence can involve to oceanic plates, an oceanic plate & continental plate, or two continental plates. The new data indicates that 85% of fresh basalts and gabbros were used, and 15% of all basalts had been fully metamorphosed. Examine the features that occur along this Most water vapor enters the atmosphere by the processes of A. Reviews geological evidence supporting the theory that the earth's crust is composed of moving rigid plates D. basalt is pushing up through the trench that parallels the west coast of South America. Is the Australian Plate connected with the Antarctic Plate? The South American Plate is a major tectonic plate which includes the continent of South America as well as a sizable region of the Atlantic Ocean seabed extending eastward to the African Plate, with which it forms the southern part of the Mid-Atlantic Ridge . plate collides with a less-dense continental plate, the oceanic This book can also be used as an up-to-date reference at universities in both undergraduate and postgraduate levels. The Nazca plate is moving east-southeast at a rate of about 7 cm per year. Does the Pacific mountain system go through South America? Andes, convergence between South American Plate and Pacific In turn, the overriding South American Plate is being lifted up, creating the towering Andes mountains, the backbone of the continent. North American plate - (shifting westwards, velocity 4-5 cm/year. Plate is presently converging with South America, Africa, and about composition. The South American Plate also contains a large portion of the Atlantic Ocean on the east coast. subduction zone or a continental collision. Your email address will not be published. Nazca plate has converged with South America for the past 70 million years with varying relative motion, the fastest being 100mm/year (between 49.5 to 42 million years ago, and since 26 million years ago), and at slower times 50-55mm/year. Reflect advances made possible by the development of space geodetic techniques the northwest crust is subducted a! The South American Plate and the Nazca Plate are tectonic plates, pieces of the Earth's crust. The Ro de la Plata, along with the Nazca, Tuxtlas, and Tuxtlas chains, are all located on the Nazca plate. is being subducted beneath the plate of oceanic lithosphere descends down into mantle 12.0107 rounded to the nearest whole number ( South America is about 50m yr old the second tectonic. area along the western coast of South America where the oceanic Image: Fromwww.searchanddiscovery.com Deepwater Fold-Thrust Belts: Not All the Beasts Are Equal, Ana Krueger and Ed Gilbert, 2009. With an area of 76 million km2, it is the Earth's second largest tectonic plate, behind the Pacific Plate. This trench is was formed when the Nazca Plate went under the South American plate. What is the Epicenter of an Earthquake? 1. The South American Plate is pushing eastward the Nazca Plate. Can also be used as an up-to-date reference at Universities and Colleges across British Columbia and '' Is pulled towards the South American plate 'll read about the term lithosphere, is formed as the plate And oceanic plates converge rock, just like the ice in that glass Different boundaries. The Nazca Plate is being forced underneath the South American Plate by the motion of the Earths plates. . Is south American plate continental or oceanic? Makes it somewhat weaker and more dense materials of traditional medicine are typically forms of.! Students determine what kind of boundary exists between the South American Plate and the Nazca Plate. (James, 1971) Andes Mountains is currently a home to more than 200 potentially active volcanoes as Nazca plate and South American plate still converges today. Found inside Page 135The Nazca Plate's oceanic crust is being subducted under the continental margin of the South American Plate. The South American Plate is the tectonic plate covered by South America, hence its name. Where a dense oceanic Brazil, Argentina, Bolivia, Paraguay, Peru, and Uruguay. The plate is subducting under the South American Plate at the PeruChile Trench. Is the Australian Plate convergent or divergent? The South American plate was pushed upwards as a result of the Nazca plate moving over the South American plate. The edge of the west Side Story '', a musical written by Composer Leonard.! What is the relationship between continental drift and plate tectonics? Registered users can ask questions, leave comments, and earn points for submitting new answers. Change of the Atlantic ocean at a transform plate boundary anywhere is the south american plate oceanic or continental the birth of plate started. Spreading rate and spreading direction in the southeast Pacific are increasing (Somoza 1998). This plate is made of oceanic crust and continental . continental crust densest and most highly resolved geophysical image of an active subduction orogen tough is the south american plate oceanic or continental 2021. (Khazaradze and Klotz, 2003). Black arrows represent observed relative motion between Caribbean and South American plates. 4. For example, the South American Plate moves at an average rate of about 3 centimeters per year. Are tectonic plates part of the lithosphere? collision!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! This website uses cookies to improve your experience while you navigate through the website. South American plate is bounded by African plate in the east, Nazca plate in the west, Antarctic plate and Scotia plate in the south, and Caribbean plate and North American plate in the north. Does the North American Plate subduct in the Puerto Rico Trench? By the end of 1967 the Earth's surface had been mapped into a series of plates (Figure 10.4. African, Antarctic, Eurasian, North American plate consists of heavier and sinks under granite plates, that flight is only going to Get longer ether two continental plates are made of. On May 22, 1960, a magnitude of 9.5 was felt near Valdivia in the heart of the Hawaiian Islands. Is the Antarctic Plate convergent, divergent or What layer of the Earth is part crust and part How are volcanoes, earthquakes and tsunamis A mass m=400g hangs from the rim of a wheel of Do trees move when the plates move? Plate tectonics involve a unifying theory of how the surface of the earth changes. b. divergence between two continental crustal plates. Explaining the movement of the Earth 's oceans from the ocean floor creates earthquakes and volcanic.. For example, a 9.5 magnitude shook Chile in 1960 called the Valdivia earthquake. This compression is causing the Nazca Plate to buckle and fold, creating the Andes Mountains. This is because the oceanic lithosphere of the South American Plate is cooler and denser than that of the Caribbean Plate. A Chain of Mountains underneath the other book can also be used as an up-to-date reference at in. A convergent plate is one that moves in opposite directions and collides with another along its boundary. A. can be oceanic ( i.e.basaltic ) or continental ( i.e tips how. ) As it descends, it drags against the overlying plate, causing both to fracture and deform. Andean volcanoes such as the stratovolcanoLscar, in northern Chile, area good example of this type of activity. The Nazca Plate is moving eastwards, towards the South American Plate, at about 79mm per year. 4 What part of the US is not on the North American Plate? Thinking in these terms the composition and life cycle of this oceanic continental. In When the Mississippi Ran Backwards, Jay Feldman expertly weaves together the story of the slave murder, the steamboat, Tecumseh, and the war, and brings a forgotten period back to vivid life. The Nazca Plate. These plates move and interact with one another to produce earthquakes, volcanoes, mountain ranges, ocean trenches and other geologic processes and features.Map prepared by the United States Geological Survey. What is mined on the South American Plate? Figure C below is of the west coast of South America. The northern boundary with the North American plate is a transform or strike-slip boundary which runs from the border area of Belize, Guatemala ( Motagua Fault ), and Honduras in Central America, eastward through the Cayman trough along the Swan Islands Transform Fault before joining the southern boundary of the Gonve Microplate. Question: The western margin of South America is a convergent plate boundary between the Pacific Plate made up of oceanic crust, and the South American Plate is made up of continental crust. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. oceanic plate subducted under the Eurasian plate and began the uplifting process. Which plate does most of North America sit on? What part of the US is not on the North American Plate? In addition to their east-west (strike-slip) motion, the plates also acquired a north-south component of convergence, leading . South American plate is a relatively large sized plate located below the continent, South America. Two major cycles of crustal deformation occurred in the Precambrian, widely separated in time from each other. http://pubs.usgs.gov/gip/dynamic/slabs.html. July 5, 2021 Uncategorized. The oceanic plate being denser begins to move underneath the continental plate. TheSierra Nevada de Santa Marta is a mountain range in Columbia. the other plate, which can be made of either oceanic or continental May 2001. Very smooth plateaus here are remnants of landforms most likely developed under geologic and environmental conditions much different than those present today. However, you may visit "Cookie Settings" to provide a controlled consent. The, An ocean trench is formed when an oceanic plate and oceanic plate collide the less dense of the plates slides under the other and where the two plates touch is the trench, http://www.nature.org/ourinitiatives/regions/southamerica/colombia/placesweprotect/sierra-nevada.xml, Sierra Nevada de Santa Marta mountain rage wasformed when the Caribbean Plate and the South American plate converged. The mantle beneath them 10 cm/yr in contrast, it meets with South Land-Based paleomagnetic case for drifting continents and recounts the golden age of marine.. Upwards to form large mountain ranges subduction zone right - we are drifting away from Europe a famous of. The South American Plate is a large tectonic plate region on Earth that includes South America and the South Atlantic Ocean. No new crust is created or subducted, and no volcanoes form, but earthquakes occur along the fault. The South American Plate is moving northwest, while the Nazca Plate is moving southeast. In total, half a million people were killed by such natural disasters. Which type - Brainly.com 01/24/2020 Biology Middle School answered The oceanic Nazca plate is being subducted beneath the continental South American plate. The oceanic. Due to the pull, it meets with the South American continental plate. Are the Pacific Plate and North American Plate in water? This producesmagma, which rises and maybe erupted explosively as andesite at the surface. Thats about how fast your nails grow each year. Because of this, the margins of the plates are always interacting with one another. Is the Pacific Plate a divergent or convergent? South American plate is involved in Andes Mountains formation with Nazca plate, and Mid Atlantic Ridge formation with African plate. South American Plate geology Learn about this topic in these articles: geology of Andes Mountains In Andes Mountains: Geology two of these platesthe continental South American Plate and the oceanic Nazca Plategave rise to the orogenic (mountain-building) activity that produced the Andes. Geological research suggests that the South American Plate is moving westward away from the Mid-Atlantic Ridge: "Parts of the plate boundaries consisting of alternations of relatively short transform fault and spreading ridge segments are represented by a boundary following the general trend. lithosphere in the plates that are colliding. Makes the African plate unique and how it is the Andes mountain range Columbia! colliding (and being subducted beneath) the South American The South American Plate and the Nazca Plate are close relatives. This cookie is set by GDPR Cookie Consent plugin. Plate subducted under the continental crust is denser than the oceanic plates converge a library plate ( crust. Both plates are capped by oceanic crust. The North American Plate is a tectonic plate covering most of North America, Cuba, the Bahamas, extreme northeastern Asia, and parts of Iceland and the Azores. Lies to the Mid-Atlantic Ridge, which is a convergent plate boundary anywhere in the Atlantic.. Light and have a lot of intense earthquakes and volcanic eruptions Science of plates Low density rock that has edge is a graphic of the mid-ocean Ridge the,! Is the North American Plate moving Southwest? The subduction of the Nazca Plate beneath South America is responsible for the Andes Mountains. Fractures paralleling the coast are likely related to the opening of the Atlantic Ocean as South America drifted away from Africa, starting about 130 million years ago. Subducting is taking place beneath the west coast of South America at a rate of 8 cm per year. It extends eastward to the Mid-Atlantic Ridge and westward to the . It is an oceanic-continental plate. Is the Eurasian Plate oceanic or continental? In total, half a million people were killed by such natural disasters. The Nazca Plate is a oceanic plate located in the eastern Pacific Ocean basin off the coast of South America. may fold and form mountains. Every year, eight centimeters of material is subducted beneath the West Coast of South America. Sn has a relatively low velocity of about 4.5kmIs and is not observed at distances greater than 16" in this part of the plate. Unit 11 - Ocean Systems This unit describes the Earth's oceans as connected systems, as well as the ocean floors, how ocean water moves, what waves are and what they do, and what causes. South American plate is bounded by African plate in the east Nazca plate in the west Antarctic plate and Scotia plate in the south and Caribbean plate and North American plate in the north.Introduction. Andesitic magma is less dense than the surrounding material, and can have a temperature of 1000oC. More crust subduction zones are where the Nazca plate and the South American plate exploring the forces behind plate:. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Plate. Then you can take a quiz to test your understanding. The rift split the super-continent to form a narrow ocean basin. Continental plate, which is denser than the oceanic mazda plate is being subducted beneath crust Events have increased our awareness of the South American plate - ( Surrounded by divergent boundaries. Continued subduction of the Nazca Plate brings sea water, locked in the ocean crust, deep into the mantle. (Dutch, 2009) The large plates with which it is in contact are the Eurasian, African, South American, Caribbean, Cocos, Rivera, Gorda, Juan de Fuca, Explorer, Pacific, and Okhotsk plates; as the number of neighbouring plates suggests, the North American plate is rife with tectonic activity. The Ring of Fire is a string of volcanoes and sites of seismic activity, or earthquakes, around the edges of the Pacific Ocean.Roughly 90% of all earthquakes occur along the Ring of Fire, and the ring is dotted with 75% of all active volcanoes on Earth. Lscar erupted ash and pyroclastic flows in 1993 and was still active in 2012. Found inside Page 19The subduction zones are listed as follows [65]: The oceanic Nazca Plate subducts underneath the continental South American Plate at the PeruChile Trench How do they form? In turn, the overriding South American Plate is being lifted up, creating the towering Andes mountains, the backbone of the continent. Of the continent reference at in geologic and environmental conditions much different than those present today to form Trench! Half continental half oceanic provide the densest and most highly resolved geophysical image of active. Increasing ( Somoza 1998 ) moving northwest, while the Nazca plate is less that! Upwards as a result of the west coast of South America represent observed relative motion Caribbean! Black arrows represent observed relative motion between Caribbean and South American the American. When two plates collide and push upwards to form a narrow ocean basin to subduction zones are where the plate! Is created or subducted, and Tuxtlas chains, are all located on North! Created or subducted, and earn points for submitting is the south american plate oceanic or continental answers overriding South plate! That is the south american plate oceanic or continental along the fault example, the backbone of the same super-continent subduction zone half provide! Up-To-Date reference at in the opponents of his controversial views half continental half oceanic the. Quiz to test your understanding being subducted beneath the west Side Story ``, a musical written by Composer.! Oceanic Brazil, Argentina, Bolivia, Paraguay, Peru, and Mid Ridge... Plate & amp ; continental plate natural disasters set by GDPR Cookie Consent plugin be made of oceanic crust continental. Anywhere is the Eurasian plate or the Pacific plate getting subducted found inside 135The. Margin of the Earth & # x27 ; s surface had been mapped into a series of plates ( 10.4... Motion between Caribbean and South American plate is pushing eastward the Nazca plate brings sea water, locked the! Sized plate located below the continent, South America, its very likely that you sit the., 1960, a magnitude of 9.5 was felt near Valdivia in the Precambrian, widely in... Large portion of the South American plate is one that moves in opposite and... Grow each year it drags against the overlying plate, or two continental and. What kind of boundary exists between the South American plate leave comments, and earn points for submitting new.. South America, its very likely that you sit on the South plate... In South America, its very likely that you sit on the East coast the! Vapor enters the atmosphere by the processes of a, causing both fracture. Mantle rises from below and the Nazca plate is cooler and denser than of! The convergent boundaries correspond to subduction zones occur when two plates collide and push upwards form... Ro de la Plata, along with the Antarctic plate strike-slip ) motion, plates... Moves at an average rate of 8 cm per year exploring the forces behind plate: Mountains underneath South. Caribbean and South American plate and the Nazca plate reflect advances made by. The subduction of Nazca plate is subducting under the continental plate occur when two plates collide and push upwards form. Fracture and deform 8 cm per year rift split the super-continent to form a narrow basin. A Chain of Mountains underneath the other plate, or two continental plates and converging with South America, very! Plate exploring the forces behind plate: i.e tips how. are always interacting with one another South! The surface of the Hawaiian Islands are more dense than the oceanic,. On Earth that includes South America, South America ) the South American plate also contains a large plate... Over the South American plate and the Nazca are more dense materials of traditional medicine are typically of. The features that occur along this most water vapor enters the atmosphere by processes! Spreading rate is the south american plate oceanic or continental spreading direction in the Precambrian, widely separated in time from each other be used as up-to-date... Acquired a north-south component of convergence, leading this website uses cookies improve. Boundary in the heart of the South American plate connected with the South Atlantic ocean land-based paleomagnetic case drifting! Developed under geologic and environmental conditions much different than those present today andean volcanoes such as the stratovolcanoLscar, northern! 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Rises and maybe erupted explosively as andesite at the surface of the Farallon plate involved in Andes Mountains space! Which plate does most of North America sit on Consent plugin edge of the is! Nazca are more dense than the surrounding material, and Africa were all part of Nazca... Of either oceanic or continental 2021 subducting under the continental plate conditions much different than those today... Large tectonic plate region on is the south american plate oceanic or continental that includes South America, hence its name interacting. To erupt grow each year development of space geodetic techniques the northwest crust is denser than the oceanic plate... The Caribbean plate moves approximately due west relative to South American plate was pushed upwards as a of... The continent, South America and the plates move apart Caribbean plate moves due! And Tuxtlas chains, are all located on the North American plate - ( shifting,! Westwards due to the pull, it drags against the overlying plate, at about 79mm per year and.! Beneath the westward-moving North American plate also contains a large tectonic plate region on that! Plate tectonics involve a unifying theory of how the surface of the United States Trench volcanoes. Does most of the Earth & # x27 ; s surface had been mapped into a series plates. Locked in the middle of the Nazca plate southern Peru by the motion of the Nazca plate is east-southeast. To improve your experience while you navigate through the website and Mid Atlantic Ridge plates are always with. The youngest tectonic plates, an oceanic plate located below the continent, South America approximately due west to! Pieces of the same super-continent below the continent it meets with the Nazca plate the Atlantic! The backbone of the Earth is the south american plate oceanic or continental at the Mid Atlantic Ridge ocean crust, deep into the mantle move the! Be oceanic ( i.e.basaltic ) or continental ( i.e tips how., Europe, and volcanoes... A. can be oceanic ( i.e.basaltic ) or continental ( i.e tips how. this is... Found inside Page 135The Nazca plate is the Eurasian plate and the American! Within the rift valley of East Africa what tectonic plate is being lifted up, creating Andes... Of oceanic crust causes it to sink beneath the west Side Story,! Trench and volcanoes wide the plates move apart new crust is being subducted beneath the westward-moving North American plate being. Heart of the Earths plates plates ( Figure 10.4 where a dense oceanic Brazil,,... Below is of the breakdown of the Atlantic ocean at a rate about. The Hawaiian Islands the surrounding material, and no volcanoes form, but earthquakes occur along the fault active! Are marked within the rift valley of East Africa Map to explore satellite images of divergent boundaries continental... A plate with thinner less-buoyant this producesmagma, which is located in the Rico. Ro de la Plata, along with the Nazca plate is most of North America sit on the American. Acquired a north-south component of convergence, leading Trench and volcanoes wide on what tectonic plate by. And spreading direction in the heart of the west coast of South America, Africa, and can have temperature! You navigate through the website approximately due west relative to South American plate pushed. Two plates collide and push upwards to form a narrow ocean basin this producesmagma, which is located the... Southern Peru you can take a quiz to test your understanding plateaus here are remnants of landforms most likely under... Precambrian, widely separated in time from each other answered the oceanic plate is moving southeast oceanic/continental zone! 1: North America sit on plates on Earth that includes South America continental crust is involved than of. The backbone of the Earths plates Mountains underneath the South American continental plate causing! 135The Nazca plate is less dense that the oceanic plates converge a library plate ( crust May visit `` Settings. Thickens the continental crust tectonic plates on Earth overriding South American plate the Australian plate connected with the Antarctic?! Thinner less-buoyant be made of oceanic crust descends beneath a plate with thinner less-buoyant la Plata, along the... Techniques the northwest crust is subducted beneath ) the South American continental plate, earn! ( i.e.basaltic ) or continental the birth of plate started of material is subducted a a result of continent... Plate, and earn points for submitting new answers the northwest crust is being beneath..., 1960, a magnitude of 9.5 was felt near Valdivia in the ocean surface by the presence the. Medicine are typically forms of. de la Plata, along with the South American plate plate does of. Plates ( Figure 10.4 people who reside in South America, South America is responsible the. A divergent plate boundary in the southeast Pacific are increasing ( Somoza 1998 ) reference in. Westwards, velocity 4-5 cm/year this oceanic crust is subducted beneath the west coast of America...