Answer:
Step-by-step explanation:
The depression formed after a volcanic eruption is typically called a "caldera." A caldera is a large, basin-shaped depression that forms when a volcano collapses into itself following a massive eruption or series of eruptions. The collapse occurs when the magma chamber beneath the volcano is emptied, causing the overlying rock to lose support and sink downward. Calderas can range in size from just a few kilometres across to many tens of kilometres, and they are often surrounded by steep cliffs or walls that rise several hundred meters above the floor of the depression.