10 the is an example of a modern convergent boundary where two continents meet. Ideas

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t Plate Boundaries – Convergent Boundary

Convergent plate boundaries are locations where lithospheric plates are moving towards one another. The plate collisions that occur in these areas can produce earthquakes, volcanic activity, and crustal deformation.

Convergent Plate Boundary – Oceanic and Continental Plates

Convergent oceanic/continental boundary

When continental and oceanic plates collide, the thinner and more dense oceanic plate is overridden by the thicker and less dense continental plate. The oceanic plate is forced down into the mantle in a process known as “subduction.” As the oceanic plate descends, it is forced into higher temperature environments. At a depth of about 100 miles (160 km), materials in the subducting plate begin to approach their melting temperatures and a process of partial melting begins.

This partial melting produces magma chambers above the subducting oceanic plate. These magma chambers are less dense than the surrounding mantle materials and are buoyant. The buoyant magma chambers begin a slow ascent through the overlying materials, melting and fracturing their way upwards. The size and depth of these magma chambers can be determined by mapping the earthquake activity around them. If a magma chamber rises to the surface without solidifying, the magma will break through in the form of a volcanic eruption.

The Washington-Oregon coastline of the United States is an example of this type of convergent plate boundary. Here the Juan de Fuca oceanic plate is subducting beneath the westward-moving North American continental plate. The Cascade Mountain Range is a line of volcanoes above the melting oceanic plate. The Andes Mountain Range of western South America is another example of a convergent boundary between an oceanic and continental plate. Here the Nazca Plate is subducting beneath the South American plate.

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Visit the Interactive Plate Boundary Map to explore satellite images of convergent boundaries between oceanic and continental plates. Two locations are marked to show this type of plate boundary – the Cascade volcanoes along the Washington-Oregon coast of North America and the Andes mountain range on the western margin of South America.

Effects of a convergent boundary between an oceanic and continental plate include: a zone of earthquake activity that is shallow along the continent margin but deepens beneath the continent; sometimes an ocean trench immediately off shore of the continent; a line of volcanic eruptions a few hundred miles inland from the shoreline; destruction of oceanic lithosphere.

Convergent Plate Boundary – Oceanic

Convergent oceanic/oceanic boundary

When a convergent boundary occurs between two oceanic plates, one of those plates will subduct beneath the other. Normally the older plate will subduct because of its higher density. The subducting plate is heated as it is forced deeper into the mantle, and at a depth of about 100 miles (150 km) the plate begins to melt. Magma chambers are produced as a result of this melting, and the magma is lower in density than the surrounding rock material. It begins ascending by melting and fracturing its way through the overlying rock material. Magma chambers that reach the surface break through to form a volcanic eruption cone. In the early stages of this type of boundary, the cones will be deep beneath the ocean surface but later grow to be higher than sea level. This produces an island chain. With continued development the islands grow larger, merge, and an elongate landmass is created.

Japan, the Aleutian Islands, and the Eastern Caribbean islands of Martinique, St. Lucia, and St. Vincent and the Grenadines are examples of islands formed through this type of plate boundary. Visit the Interactive Plate Boundary Map to explore satellite images of these three areas.

Effects that are found at this type of plate boundary include: a zone of progressively deeper earthquakes; an oceanic trench; a chain of volcanic islands; the destruction of oceanic lithosphere.

Convergent Plate Boundary – Continental

Convergent continental/continental boundary

This is a difficult boundary to draw. First it is complex and second, it is poorly understood when compared to the other types of plate boundaries. In this type of convergent boundary, a powerful collision occurs. The two thick continental plates collide, and both of them have a density that is much lower than the mantle, which prevents subduction (there may be a small amount of subduction, or the heavier lithosphere below the continental crust might break free from the crust and subduct).

Fragments of crust or continent margin sediments might be caught in the collision zone between the continents, forming a highly deformed melange of rock. The intense compression can also cause extensive folding and faulting of rocks within the two colliding plates. This deformation can extend hundreds of miles into the plate interior.

The Himalaya Mountain Range is the best active example of this type of plate boundary. Visit the Interactive Plate Boundary Map to explore satellite images of the Himalaya Range where the Indian and Eurasian plates are currently in collision. The Appalachian Mountain Range is an ancient example of this collision type and is also marked on the map.

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Effects found at a convergent boundary between continental plates include: intense folding and faulting; a broad folded mountain range; shallow earthquake activity; shortening and thickening of the plates within the collision zone.

Contributor: Hobart King
Publisher, Geology.com

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Convergent Plate Boundaries – Geology.com

Convergent Plate Boundaries - Geology.com

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  • Sumary: Convergent Plate Boundaries in continental and oceanic lithosphere

  • Matching Result: The Andes Mountain Range of western South America is another example of a convergent boundary between an oceanic and continental plate. Here the Nazca Plate is …

  • Intro: Convergent Plate Boundaries – Convergent Boundary Convergent plate boundaries are locations where lithospheric plates are moving towards one another. The plate collisions that occur in these areas can produce earthquakes, volcanic activity, and crustal deformation. Convergent Plate Boundary – Oceanic and Continental Plates When continental and oceanic plates collide, the…
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4.6: Convergent Plate Boundaries – Geosciences LibreTexts

4.6: Convergent Plate Boundaries - Geosciences LibreTexts

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  • Sumary: Convergent boundaries, where two plates are moving toward each other, are of three types, depending on the type of crust present on either side of the boundary — oceanic or…

  • Matching Result: Examples of ocean-continent convergent boundaries are subduction of the Nazca Plate under South America (which has created the Andes Mountains …

  • Intro: 4.6: Convergent Plate Boundaries Last updated Save as PDF Page ID4490 Convergent boundaries, where two plates are moving toward each other, are of three types, depending on the type of crust present on either side of the boundary — oceanic or continental. The types are ocean-ocean, ocean-continent, and continent-continent. At…
  • Source: https://geo.libretexts.org/Bookshelves/Oceanography/Book%3A_Introduction_to_Oceanography_(Webb)/04%3A_Plate_Tectonics_and_Marine_Geology/4.06%3A_Convergent_Plate_Boundaries

Types of Plate Boundaries – Cliffs Notes

Types of Plate Boundaries - Cliffs Notes

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  • Sumary: Convergent boundaries. Plates may converge directly or at an angle. Three types of convergent boundaries are recognized: continent‐continent, oc

  • Matching Result: Continent‐continent convergence results when two continents collide. The continents were separated at one time by oceanic crust that was progressively subducted …

  • Intro: Types of Plate Boundaries Convergent boundaries. Plates may converge directly or at an angle. Three types of convergent boundaries are recognized: continent‐continent, ocean‐continent, and ocean‐ocean. Continent‐continent convergence results when two continents collide. The continents were separated at one time by oceanic crust that was progressively subducted under one of the…
  • Source: https://www.cliffsnotes.com/study-guides/geology/plate-tectonics/types-of-plate-boundaries

Frequently Asked Questions About the is an example of a modern convergent boundary where two continents meet.

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Convergent plate boundaries: what are they?

A convergent boundary occurs when two plates collide, and the force of the collision can cause one or both of the plates’ edges to buckle up into mountain ranges or bend down into a deep seafloor trench.

What examples from the list below represent oceanic-continental plate convergent boundaries?

A continental arc, mountains, and a trench are features that are present at an oceanic-continental convergent plate boundary. The Marianas Trench, the Aleutian Islands, and Japan are examples of such features.

What locations are convergent boundaries?

The geologic features associated with convergent boundaries vary depending on the types of crust and occur between oceanic-oceanic lithosphere, oceanic-continental lithosphere, and continental-continental lithosphere.

What two characteristics are present at the convergent ocean-ocean plate boundaries?

Deep trenches are common features formed where tectonic plates are subducting, and earthquakes are frequent at subduction zones. Subduction is the process of one of the converging plates moving beneath the other.

Which three convergent boundary types are there?

Depending on the type of crust present on either side of the boundary—oceanic or continental—convergent boundaries, where two plates are moving toward one another, can be divided into three categories: ocean-ocean, ocean-continent, and continent-continent.

What are the convergent boundaries’ names?

There are three different kinds of convergent boundaries: ocean-continent, ocean-ocean, and continent-continent. Continent-continent convergence occurs when two continents collide. Previously, the continents were separated by oceanic crust that was gradually subducted under one of the continents.

Which of the following is an oceanic plate or an oceanic and continental plate that is converging?

An oceanic subduction zone is created when two oceanic plates collide and the denser plate eventually sinks beneath the less dense plate.

Why do convergent plate boundaries come in two varieties?

According to the density of the involved plates, there are two types of convergence boundary movement: subduction and collision. Convergent boundaries, also known as destructive boundaries, are regions where two or more plates move toward one another.

What boundary may form at the meeting of two oceanic plates or when an oceanic plate meets a continental plate?

When two plates collide, either between two oceanic plates, between two continents, or between a continent and the oceanic crust, a convergent plate boundary results.

When two oceanic plates collide and one is pushed beneath the other, what kind of convergent boundary results?

When two oceanic plates collide, a subduction zone is also created as the older plate is forced under the younger one, resulting in the formation of island arcs, which are long chains of volcanic islands.

Which plate is subducted when two oceanic plates collide at a convergent boundary?

The characteristics of an ocean-ocean subduction zone are the same as those of a continent-ocean subduction zone when two plates collide at a convergent plate boundary, the older, denser plate subducts beneath the less dense plate.

When two plates collide and form trenches, what type of convergent boundary results?

This process, known as subduction, causes the formation of deep ocean trenches like the one off the west coast of South America. As the rocks are pulled down beneath the continent, they start to melt, and occasionally the molten rock rises to the surface and pierces the continent to create a line of volcanoes.

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