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Which of the following are associated with composite volcanoes? I. They result in explosive eruptions. II. They eject pyroclastic materials. III. Pyroclastic materials and ashes accumulate near the vent, forming layers. Select the correct answer using the code given below.

Options

  1. AI and II only
  2. BII and III only
  3. CI and III only
  4. DI, II and III

Correct answer

D. I, II and III

Step-by-step solution

Composite volcanoes are characterised by eruptions of cooler and more viscous lavas than basalt. These volcanoes often result in explosive eruptions. Along with lava, large quantities of pyroclastic material and ashes find their way to the ground. This material gathers near the vent openings leading to the creation of layers, which gives them the name composite volcanoes or stratovolcanoes. Therefore, all three statements I, II, and III are correct. Answer: I, II and III

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