GEOLOGY

Detailed explanation-1: -A caldera is a large depression formed when a volcano erupts and collapses. During a volcanic eruption, magma present in the magma chamber underneath the volcano is expelled, often forcefully. When the magma chamber empties, the support that the magma had provided inside the chamber disappears.

Detailed explanation-2: -Calderas are collapse features that form during large-volume volcanic eruptions when the underlying magma chamber is partially emptied and the ground above it subsides into it.

Detailed explanation-3: -A caldera is not the same thing as a crater. Craters are formed by the outward explosion of rocks and other materials from a volcano. Calderas are formed by the inward collapse of a volcano. Craters are usually more circular than calderas.

Detailed explanation-4: -Caldera: In some volcanoes, the summit of the volcano blows up during a violent explosion resulting in the formation of a large depression called a Caldera. Some calderas may have been formed by the collapse of the summit portion. Calderas are occupied by large lakes. The lake in the caldera is called the crater lake.

Detailed explanation-5: -Calderas form when magma chambers are partially emptied during large eruptions and the land surface subsides and the area above the shallow magma reservoir collapses.