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Which of the following statements is accurate about volcanism?
Select all that apply.
A
often occurs at subduction zones
B
calmer volcanic activity occurs at seafloor spreading areas
+
с
always occurs at transform boundaries
D
volcanism helps scientist determine location and type of plate boundaries

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Volcanoes are produced in convergent and divergent boundaries. The options are A) often occurs at subduction zones, and D) volcanism helps scientist determine location and type of plate boundaries.

Which boundaries are involved in volcanic activity?

I. Divergent:

  • This boundary occurs when two plates separate and molten material rises from the mantle creating a new crust.

  • The hot material creates a new seabed between the separating plates, expanding the sea bottom.

  • Eruptions do not produce big notorious mountainous volcanoes due to the temperature shock between the rising hot magma and oceanic water.

II. Convergent.

  • Collision area between two plates.

  • Two oceanic plates might collide, or one oceanic plate with a continental one.

  • In this last case, the oceanic plate sinks under the continental plate, and magma rises to the surface by crevices.

  • The thicker and older plate subduces under the other plate.

  • Volcanoes get formed on the superior plate since magma flows over it.

Besides boundaries, volcanoes also emerge from hotspots.

What is a hotspot?

Hotspots are also random points over the globe where volcanoes are formed.

Why are Topographic maps significant?

Usually, maps of tectonic plate boundaries are made using earthquake locations and volcanoes' distribution.

Topographic maps can be useful to determine the location of plate boundaries and the type to which they belong.

Then, according to the type and area in which volcanoes are, researchers can identify the boundary type (convergent or divergent)

The correct options are,

A) often occurs at subduction zones

D) volcanism helps scientist determine location and type of plate boundaries

You can learn more about volcanism at

https://brainly.com/question/817944

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