Question

the summits of some volcanoes are characterized by very wide, steep - sided depressions known as ____ most of which form by ____. select one: a. explosion pits/voluminous eruptions b. calderas/collapse of empty magma chamber c. parasitic cones/lava flows d. basalt plateaus/fissure eruptions

Explanation:

Calderas are large, steep - sided depressions at volcano summits. They typically form when the empty magma chamber collapses after a large - scale eruption.

Answer:

B. calderas/collapse of empty magma chamber