What is a large circular or elliptical depression at the summit of a volcano resulting from collapse called?

Name: What is a large circular or elliptical depression at the summit of a volcano resulting from collapse called?
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A caldera is a large, basin-like depression that forms following the evacuation of a magma chamber/reservoir. When a volcano erupts, it can empty the magma chamber beneath it. Without the support of the magma, the ground above the chamber can collapse, forming a caldera.

What Is a Large Circular or Elliptical Depression at the Summit