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Why does intermediate magma erupt in continental arcs?

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∙ 8y ago

Updated: 11/18/2022

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Q: Why does intermediate magma erupt in continental arcs?

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What is the type of rock typical of island arcs?

The type of rock typical of island arcs is andesite. Andesite is an intermediate volcanic rock that is commonly found in volcanic arcs where oceanic crust subducts beneath continental crust, forming magma that eventually erupts to create volcanic islands.

Does the mantle have mafic magma or felsic magma in it?

The mantle primarily contains mafic magma, which is rich in iron and magnesium. Felsic magma, which is rich in silica, is more commonly found in areas associated with continental crust or in volcanic arcs.

What types of mountains form when oceanic plates collide and slide under continental plates?

When oceanic plates collide and slide under continental plates, they can form volcanic mountain ranges called continental volcanic arcs. These arcs result from the melting of the descending oceanic plate, which then feeds magma to the Earth's surface. Examples include the Andes in South America and the Cascades in North America.

How is dacite formed?

Dacite is formed through the cooling and solidification of magma with a high silica content. This magma typically originates from partial melting of the Earth's crust, often associated with subduction zones or continental volcanic arcs. As the magma rises to the surface and cools, dacite is one of the volcanic rock types that can be produced.

What kind of volcanoe does granite come from?

Granite is an igneous rock that forms from the cooling and solidification of magma deep within the Earth's crust. This type of magma is typically associated with continental volcanic arcs or intrusions, rather than volcanic eruptions at the surface.

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Related Questions

What is the type of rock typical of island arcs?

The type of rock typical of island arcs is andesite. Andesite is an intermediate volcanic rock that is commonly found in volcanic arcs where oceanic crust subducts beneath continental crust, forming magma that eventually erupts to create volcanic islands.

What forms on the ocean floors in a subduction zone?

Deep ocean trenches and volcanic arcs form on the ocean floors in a subduction zone. The oceanic plate is forced beneath the continental plate, creating a deep trench. Melting of the subducted plate leads to the formation of magma, which can erupt at the surface to create volcanic arcs.

Oceanic-continental convergent plate boundary.?

In an oceanic-continental convergent plate boundary, an oceanic plate is subducted beneath a continental plate due to differences in density. This process can lead to the formation of deep ocean trenches, volcanic arcs on the continental plate, and earthquakes. The subduction of the oceanic plate can also cause melting of rock, leading to the formation of magma that can erupt as volcanoes on the continental plate.

Where is andesitic magma found?

Andesitic magma is commonly found in subduction zones where oceanic crust is being forced beneath continental crust. These environments are typically associated with volcanic arcs and stratovolcanoes. Examples of where andesitic magma is found include the Andes Mountains in South America and the Cascades in the western United States.

Does the mantle have mafic magma or felsic magma in it?

The mantle primarily contains mafic magma, which is rich in iron and magnesium. Felsic magma, which is rich in silica, is more commonly found in areas associated with continental crust or in volcanic arcs.

What types of mountains form when oceanic plates collide and slide under continental plates?

When oceanic plates collide and slide under continental plates, they can form volcanic mountain ranges called continental volcanic arcs. These arcs result from the melting of the descending oceanic plate, which then feeds magma to the Earth's surface. Examples include the Andes in South America and the Cascades in North America.

How is dacite formed?

Dacite is formed through the cooling and solidification of magma with a high silica content. This magma typically originates from partial melting of the Earth's crust, often associated with subduction zones or continental volcanic arcs. As the magma rises to the surface and cools, dacite is one of the volcanic rock types that can be produced.

What occurs when sea plates collide with continental plates?

When a oceanic plate collides with a continental plate, the denser oceanic plate is usually subducted beneath the lighter continental plate. This can result in the formation of mountain ranges, volcanic arcs, and deep ocean trenches. The collision can also lead to earthquakes and the release of magma.

What kind of volcanoe does granite come from?

Granite is an igneous rock that forms from the cooling and solidification of magma deep within the Earth's crust. This type of magma is typically associated with continental volcanic arcs or intrusions, rather than volcanic eruptions at the surface.

Where are continental volcanic arcs found?

Continental volcanic arcs are found at the boundaries where an oceanic plate subducts beneath a continental plate. Examples include the Andes in South America, the Cascades in North America, and the Japan Alps in Japan. These volcanic arcs are associated with explosive eruptions due to the interaction between the subducting oceanic plate and the overlying continental plate.

Steps in arc continent mountain formation?

Subduction occurs when an oceanic plate is forced below a continental plate. The subducted plate melts, creating magma that rises and forms volcanic arcs. Continued subduction and uplift lead to the formation of large mountain ranges on the overriding continental plate.

Which boundaries are likely to result in volcanic island arcs?

Volcanic island arcs are likely to result from convergent boundaries where an oceanic plate subducts beneath another oceanic plate or a continental plate. The subducted plate can melt, causing magma to rise and form a series of volcanic islands above the subduction zone.

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