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When two oceanic plates collide, the denser of the two slides under the other and into the mantle in a pocess called subduction. As this happens it brings some saewater with it. The seawater seepds into the superheated rocks in the mantle, causing some rock to melt. The resulting magma rises though the crust, causing volcanoes to form. These start on the sea floor and eventually build into islands. Additionally, as the plate subducts, sediment is scraped off the top and piles up where the two plates meet, forming an accretionary prism. The sediment is turned into stone by the pressure. In some cases, parts of the accretionary prism may poke above the surface, forming islands.
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What is a string of volcanoes along an ocean to ocean convergent boundary?
A chain of volcanoes is called a volcanic arc.
What is newly formed land consisting of an arc-shaped island chain called?
Volcanic island arc
Aera where an oceanic plate goes down into the mantle?
A subduction zone at a convergent plate boundary. Undersea trenches are formed where the oceanic plate subducts, and volcanism and earthquakes may result from the partial melting and downward movement of the subducting crust.
Where is each type of plate boundary present?
-Transform boundaries occur where plates slide or, perhaps more accurately, grind past each other along transform faults. The relative motion of the two plates is either sinistral (left side toward the observer) or dextral (right side toward the observer). The San Andreas Fault in California is one example. -Divergent boundaries occur where two plates slide apart from each other. Mid-ocean ridges (e.g., Mid-Atlantic Ridge) and active zones of rifting (such as Africa's Great Rift Valley) are both examples of divergent boundaries. -Convergent boundaries (or active margins) occur where two plates slide towards each other commonly forming either a subduction zone (if one plate moves underneath the other) or a continental collision (if the two plates contain continental crust). Deep marine trenches are typically associated with subduction zones. The subducting slab contains many hydrous minerals, which release their water on heating; this water then causes the mantle to melt, producing volcanism. Examples of this are the Andes mountain range in South America and the Japanese island arc.
What is subvergent boundary?
A subduction zone is a type of plate boundary where the denser of the two tectonic plates travelling towards each other will 'slide', or subduct, beneath the other.
What type of plate boundary formed at islands?
constructive plate boundaries cause volcanoes.
Which can be produced at an ocean-continental convergent boundary?
continental volcanic arc
What is the difference between an oceanic-oceanic convergent boundary and a oceanic-continental convergent boundary?
Oceanice oceanic has a trench, which is usually the deepest part of the ocean. It also has a volcanic island. That is how Islands are found in the center of oceans. oceanic convergent has similar features but do not have islands but instead volcanic arc on the continents.
What is the difference between an island arc and an island chain?
An island chain is a chain of islands that form in the middle of a plate. Example: Hawaii An island arc is a string of islands that form on a plate boundary. Example: Japan
The Aleutian Islands occur at a what type of boundary?
convergent boundary on a volcanic arc above a northward-subducting Pacific plate
What is produced at convergent plate boundaries?
A trench and a island arc
A series of volcanic islands that form along a plate boundary is called a what?
This is called a volcanic island arc.
String of volcanic landforms along a convergent boundarie?
island arc
What is a string of volcanoes along an ocean to ocean convergent boundary?
A chain of volcanoes is called a volcanic arc.
Which convergent plate boundary forms when two oceanic plates collide?
A DESTRUCTIVE or CONVERGENT plate boundary. e.g. Japan and the Pacific Ocean A DIVERGENT plate boundary is one in which the tectonic plates are separating/. e.g. The Mid-Atlantic ridge. A TRANSFORM plate boundary is one were the plates slide past each other. e.g. part of the San Andreas fault in California.
The cascade range volcanoes are associated with which type of plate boundary?
convergent oceanic oceanic
Volcanic island arc are associated with what type of plate boundaries?
convergent oceanic oceanic
