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The most explosive type of volcano is

  • A.The caldera
  • B.A cinder cone
  • C.Basalt plateau
  • D.Shield volcanoes

Answer: A

A caldera forms in the most violent eruptions of all: gas-rich, viscous magma is blown out so rapidly that the emptied chamber roof collapses, leaving a basin many kilometres wide. Krakatoa and Santorini are examples.

Shield volcanoes and basalt plateaus erupt fluid lava quietly, and cinder cones produce only small, local explosive activity.

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