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Flashcards in Hot Spots- Key terms Deck (6)
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1
Q

What is a mantle plume?

A

A mantle plume is upwelling magma heated by the hot spot in the Earth’s mantle

2
Q

What is an island chain?

A

A succession of volcanoes formed by the plate moving over a hot spot like a conveyor belt

3
Q

What is a sea mount?

A

When older volcanoes in an island chain are no longer active and are worn down by marine erosion, becoming low enough to be beneath the surface

4
Q

What is a supervolcano?

A

When a pool of magma is trapped beneath continental crust and builds up pressure until it erupts in a huge explosion

5
Q

What is a caldera?

A

A caldera is when the land above the pool if magma can no longer be supported and so collapses forming a huge depression

6
Q

What is a hot spot?

A

A hot spot is a small area in the Earth’s crust where an unusually high amount of radioactivity leads to volcanic activity