Question

How do volcanoes above hot spots differ from volcanoes above subduction zones?


A. Volcanoes above hot spots have more viscous lava.
B. Volcanoes above hot spots tend to be stratovolcanoes.
C. Volcanoes above subduction zones have lava that is not basaltic.
D. Volcanoes above subduction zones do not tend to be in major earthquake areas.

Answer 1

C. Volcanoes above subduction zones have lava that is not basaltic.

Answer 2

Option (C)

Explanation:

The magma in the hot-spot region are basaltic, they can move fast because of their low viscosity. Whereas, the magma present in the subduction zone are rhyolitic, and moves slowly due to its high viscosity. Viscosity of a magma is directly proportional to its silica content.

This is the difference between the volcanoes over a hot-spot region and over subduction zone.

Answer: Thus, the correct answer is option (C).