gabrielmontegrande26
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1. How do volcanic arc and island arc form? How do these features differ? 2. What happens when two crusts collide? 3. What happens when two plates slide past each other? 1. What happens when magma that rises from a divergent boundary? 2. What geographical structure is formed at a divergent boundary? 3. Complete the table below to compare the types of convergent boundary.​

Sagot :

janaeloisecorambao

Answer:

1. Offshore volcanoes form islands, resulting in a volcanic island arc. Generally, volcanic arcs result from the subduction of an oceanic tectonic plate under another tectonic plate, and often parallel an oceanic trench. ... Here the mantle melts and forms magma at depth under the overriding plate.

2. When two plates with continental crust collide, they will crumple and fold the rock between them. A plate with older, denser oceanic crust will sink beneath another plate. The crust melts in the asthenosphere and is destroyed.

3. When oceanic or continental plates slide past each other in opposite directions, or move in the same direction but at different speeds, a transform fault boundary is formed. No new crust is created or subducted, and no volcanoes form, but earthquakes occur along the fault.

1. Decompression melting often occurs at divergent boundaries, where tectonic plates separate. The rifting movement causes the buoyant magma below to rise and fill the space of lower pressure. The rock then cools into new crust. ... This process transfers heat and creates magma.

2. A divergent plate boundary often forms a mountain chain known as a ridge. This feature forms as magma escapes into the space between the spreading tectonic plates.

3. 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.

oceanic to oceanic-If the two plates that meet at a convergent plate boundary both are of oceanic crust, the older, denser plate will subduct beneath the less dense plate. ... The older plate subducts into a trench, resulting in earthquakes. Melting of mantle material creates volcanoes at the subduction zone.

ocean to continent-When oceanic crust converges with continental crust, the denser oceanic plate plunges beneath the continental plate. This process, called subduction, occurs at the oceanic trenches. ... The subducting plate causes melting in the mantle above the plate. The magma rises and erupts, creating volcanoes.

continental to continental-Another type of convergent plate boundary is when two continental plates collide. Continental lithosphere is low in density and very thick. Continental lithosphere cannot subduct. So when two continental plates collide, they just smash together.

hope this can help

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