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Intro to Physical Geography > Volcanoes > Flashcards

Flashcards in Volcanoes Deck (2)
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1

What is a volcano?

vent or fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt.

2

Where does volcanic activity occur?

In 3 main areas of plates:
1. Spreading ridges undersea and on continents (Divergent boundaries, new crust produced)
2. Subduction zones (Convergent boundaries, old crust destroyed)
3. Hot Spots within plates