Mastering Volcanic Classification
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Questions and Answers

Name the three major types of volcanoes based on the frequency of their eruptions.

Active volcanoes, Dormant volcanoes, Extinct volcanoes.

How many active volcanoes are there in the world?

About 500.

Give three examples of active volcanoes.

Mt. St Helena (USA), Mt. Stromboli, Mt. Etna (Italy), Mauna Loa (Hawaii).

What are dormant volcanoes?

<p>Volcanoes that have erupted in the past and are likely to erupt again after remaining inactive for long periods.</p> Signup and view all the answers

Provide an example of a dormant volcano.

<p>Mt. Vesuvius.</p> Signup and view all the answers

What are the two main causes of volcanic activity on Earth?

<p>Diverging and converging tectonic plates.</p> Signup and view all the answers

Where are most volcanoes found on Earth?

<p>Most volcanoes are found underwater.</p> Signup and view all the answers

Name two specific locations where volcanoes can form due to stretching and thinning of the Earth's crust.

<p>East African Rift and Wells Gray-Clearwater volcanic field.</p> Signup and view all the answers

What is the postulated cause of volcanism away from plate boundaries?

<p>Upwelling diapirs from the core–mantle boundary.</p> Signup and view all the answers

What is hotspot volcanism and give an example?

<p>Hotspot volcanism is the formation of volcanoes away from plate boundaries due to upwelling magma. The Hawaiian hotspot is an example.</p> Signup and view all the answers

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