Earth Science Quiz
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HAZARDS: EARTHQUAKES AND VOLCANOES
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The formation of a caldera is primarily a result of which geologic process?
A
The explosive excavation of material from a volcanic vent, creating a bowl-shaped depression at the summit.
B
The gradual erosion of a volcanic cone by glaciers and water, carving out a large amphitheater-like basin.
C
The subsidence of the roof of a magma chamber after it has been substantially emptied during a large eruption.
D
The forceful intrusion of a viscous magma body near the surface, causing the overlying ground to dome upwards and fracture.
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